style(test): prettier formatting in export e2e spec

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ARCHITECTURE.md

@@ -59,11 +59,11 @@ Datenzugriff ausschließlich über TanStack Query gegen die Backend-API (kein di
 
 ## 3. Auth-Flow
 
-1. Login (`POST /api/v1/auth/login`) mit E-Mail/Passwort → Access-Token (kurzlebig, ~15 min, JWT) + Refresh-Token (langlebig, ~7 Tage, in DB als Hash gespeichert, rotierend).
-2. Frontend hält Access-Token im Memory/React-Context, Refresh-Token als httpOnly-Cookie.
-3. Bei 401 automatischer Refresh über `POST /api/v1/auth/refresh`, danach Retry.
-4. Jeder geschützte Endpunkt: `JwtAuthGuard` (Authentifizierung) + `RolesGuard` (Autorisierung nach Rolle aus Abschnitt 3).
-5. API-Client-Rolle nutzt dieselben JWT-Endpunkte mit client-credentials-artigem Service-Account (kein OAuth2-Server im MVP, siehe Annahmen).
+1. Login (`POST /api/v1/auth/login`) mit E-Mail/Passwort → Access-Token (15 min, JWT HS256, `iss=apicore`, `aud=apicore:access`) + Refresh-Token (in DB als Hash, rotierend). Bei aktiver MFA zuerst ein Zwischen-Token (`aud=apicore:mfa-challenge`), das nie als Access-Token gilt.
+2. Frontend hält Access-Token im Memory/React-Context, Refresh-Token als httpOnly-Cookie (`Secure`, `SameSite=Lax`, Pfad `/api/v1/auth`).
+3. Bei 401 automatischer Refresh über `POST /api/v1/auth/refresh`, danach Retry. Rotation atomar; Wiederverwendung eines alten Tokens (nach 10 s Gnadenfrist für parallele Tabs) beendet alle Sitzungen. Spätestens `SESSION_MAX_AGE` (7 Tage) nach dem Login ist neu anzumelden.
+4. Guards in dieser Reihenfolge: `ThrottlerGuard` → `JwtAuthGuard` (Authentifizierung, Gültigkeit frisch aus der DB je Anfrage) → `PermissionsGuard` (Berechtigung, fail-closed).
+5. Maschinen-Zugriff (Wabenhain) nur per API-Schlüssel mit Scope-Allowlist und optionaler IP-Allowlist, siehe Annahme 14 und Abschnitt 9.
 
 ## 4. Datenfluss / Rückverfolgbarkeit
 
@@ -100,6 +100,17 @@ Fachliche Annahmen, getroffen weil das Lastenheft an der Stelle keine eindeutige
 9. **M365-Kalender-Synchronisation als einseitiger, asynchroner Push**: Abschnitt 4.25 verlangt nur einen internen Betriebskalender, keine externe Anbindung – diese Funktion ist eine reine Erweiterung ohne Lastenheft-Vorgabe. Umgesetzt als `CalendarSyncModule` (`ApiCore-Backend/src/calendar-sync/`): App-only Graph-API-Zugriff per Client-Credentials-Flow (`GraphClientService`) statt delegierter Anmeldung, da die Synchronisation unbeaufsichtigt im Hintergrund laufen muss und nicht an eine interaktive Benutzersitzung gebunden sein darf. Nutzt bewusst dieselbe Entra-App-Registrierung wie das SSO-Login (`OIDC_ISSUER_URL`/`OIDC_CLIENT_ID`/`OIDC_CLIENT_SECRET`, ausschließlich Env-Variablen) statt einer zweiten, separaten App-Registrierung – ein Enterprise-App-Objekt im Tenant genügt, sofern es zusätzlich zu den delegierten Login-Scopes auch die Application-Permission „Calendars.ReadWrite“ (Admin-Consent) erhält; die Tenant-ID wird dafür aus dem Pfad von `OIDC_ISSUER_URL` abgeleitet, statt eine weitere Konfigurationsvariable zu benötigen. Die Übertragung ist bewusst nur einseitig (ApiCore → M365-Gruppenkalender, adressiert über `groupId`); Änderungen, die direkt im M365-Kalender vorgenommen werden, fließen nicht zurück. Statt eines synchronen Push im Request-Pfad (wie beim Webhooks-Modul) nutzt `CalendarSyncOutboxEntry` ein Outbox-Muster mit minütlichem `@Cron`-Worker: Graph-API-Aufrufe sind zu langsam/fehleranfällig (Token-Refresh, Drosselung, transiente 5xx), um eine Durchsicht-/Aufgaben-Erstellung darauf warten zu lassen; fehlgeschlagene Versuche werden bis zu 5-mal wiederholt, danach bleibt der Eintrag `FAILED` bis zu einem manuellen "Jetzt synchronisieren" oder einer erneuten Änderung des Quelldatensatzes. Pro Quelltyp (Aufgabe/Durchsicht/Behandlung/Fütterung/Ernte/Königinnen-Zuordnung) ist die Synchronisation einzeln über die GUI (Verwaltung > Automatisierung > Kalender-Sync) abschaltbar; Kalendereinträge werden als ganztägige Graph-Events (`isAllDay: true`) angelegt, um Zeitzonen-/Uhrzeit-Mehrdeutigkeiten zu vermeiden, da die zugrundeliegenden Fachdaten selbst keine Uhrzeit führen.
 10. **Wartezeit manuell statt aus Wirkstoff-Datenbank abgeleitet**: `Treatment.withdrawalPeriodDays` wird pro Behandlung von Hand eingetragen (laut Packungsbeilage des verwendeten Mittels), statt automatisch aus Produktname/Wirkstoff hergeleitet zu werden. Eine hartkodierte Zuordnung Produkt→Wartezeit wäre eine faktische, rechtlich relevante Behauptung über Tierarzneimittel-Zulassungen, die im Code weder aktuell gehalten noch verlässlich verifiziert werden kann; die Verantwortung für den korrekten Wert bleibt beim Imker. Die App warnt in der Ernte-Erfassung nur, wenn ein Wert hinterlegt wurde und dessen Fenster (`endDate ?? date` + `withdrawalPeriodDays`) noch nicht abgelaufen ist – sie blockiert die Ernte nicht hart, da Ernte-Datensätze auch nachträglich für bereits erfolgte, reale Ernten erfasst werden.
 
+11. **Idempotenz per Opt-in**: Anlege-Endpunkte, die Formulare und die Offline-Warteschlange wiederholen können (Durchsicht, Behandlung, Fütterung, Varroa, Schwarmkontrolle, Ernte, Aufgabe, Abfüllung, Lagerbewegung), tragen `@Idempotent()`. Der Client sendet je Vorgang einen `Idempotency-Key`; eine Wiederholung liefert die gespeicherte erste Antwort (`IdempotencyRecord`, 90 Tage). Bewusst kein globaler Interceptor, da gespeicherte Antworten sonst Geheimnisse (MFA-Setup, Tokens) enthalten könnten. Die Tabelle ist flüchtig und nicht Teil des Backups.
+12. **Automatische Aufgaben sind Vorschläge**: `Task.sourceAutomationTrigger` kennzeichnet von Regeln erzeugte Aufgaben. Je Regel und Objekt existiert höchstens eine offene Aufgabe. Keine voreingestellte Frist (fachlich nicht belastbar ableitbar); optional `config.dueInDays` je Regel. Die Varroa-Schwelle (Milben/Tag) wird nur mit Tagesraten des natürlichen Milbenfalls verglichen.
+14. **API-Schlüssel für Maschinen-Zugriffe**: Integrationen (Wabenhain-Shop) nutzen einen Schlüssel `ack_…` im `Authorization: Bearer`-Header statt eines Service-Kontos mit Passwort. Gespeichert wird nur der SHA-256-Hash (32 Zufallsbytes, daher kein langsamer KDF nötig); der Klartext erscheint einmal bei der Erstellung. Ein Schlüssel ist kein Benutzer: `JwtAuthGuard` setzt `request.apiKey` statt `request.user`, `PermissionsGuard` lässt ihn nur auf Routen, deren Berechtigung in seinen Scopes steht – `@AnyAuthenticatedUser`-Routen nie. Erlaubte Scopes sind eine kurze Allowlist (`api-keys/api-key-scopes.ts`, derzeit nur `shop-sync:read`). Verwaltung mit `api-keys:manage`. Schlüssel sind bewusst nicht Teil des Backups: nach einer Wiederherstellung wird ein neuer Schlüssel ausgestellt.
+13. **Lebende vs. beendete Völker**: Nur `DISSOLVED`, `SOLD`, `DECEASED`, `MERGED` sperren Umsetzen/Teilen/Vereinigen/Königinzuweisung (`colonies/colony-status.ts`). `WEAK`, `CONSPICUOUS`, `QUEENLESS` bleiben bearbeitbar.
+15. **Bestandsbuch aus Behandlungen, nicht als eigenes Register**: Das Bestandsbuch nach Art. 108 VO (EU) 2019/6 wird aus `Treatment` erzeugt (`export/treatment-log.ts`); Lieferant, Erwerbsbeleg und verschreibender Tierarzt sind Freitextfelder der Behandlung, Name/Anschrift des Halters liegen in `SiteSettings`. Der Stand am Behandlungstag wird beim Anlegen als `Treatment.apiaryId` festgehalten (Umsetzen ändert ihn nicht nachträglich); für Altbestand wird er aus `ColonyApiaryHistory` abgeleitet und im PDF bei Unsicherheit markiert. Fehlende Pflichtangaben werden als „FEHLT“ gedruckt statt still weggelassen. Keine Wartezeit-Automatik (siehe 10).
+16. **Überwinterung als eigene Einträge statt Volksstatus**: `WinterCheck` (eindeutig je Volk, `winterYear`, Saison) hält Ein- und Auswinterung; ab Juli gehört ein Datum zum Winter desselben Jahres. Verlustursachen sind bewusst nur die COLOSS-Kategorien, keine Diagnosen. Die Übersicht gruppiert nach dem aktuellen Stand des Volkes. Ein Verlust ändert den Volksstatus nur auf ausdrücklichen Wunsch (`markColonyDeceased`). Neue Rechte vergibt die Migration an Nicht-System-Rollen, weil der Katalog-Sync nur System-Rollen berechtigt.
+
+17. **Schutz gegen Rechteausweitung in der Benutzerverwaltung**: Wer Benutzer pflegt, darf nur Konten verwalten (Passwort/MFA zurücksetzen, E-Mail ändern, (de)aktivieren) und Rollen vergeben, deren Rechte er selbst vollständig hat (`UsersService.assertWithinCallerPermissions`), analog zur Rollenbearbeitung.
+18. **SSO-Bindung an die IdP-Identität**: Die erste Microsoft-Anmeldung bindet das Konto an `"<iss>|<oid>"` (`User.ssoSubject`); danach zählt nur noch diese Identität, nicht der unverifizierte E-Mail-Claim. Mandantenübergreifende Issuer (`common`/`organizations`/`consumers`) schalten SSO ab. E-Mails werden ohne Groß-/Kleinschreibung verglichen.
+19. **Backups versiegelt**: AES-256-GCM über das gzip-Bundle, Schlüssel `BACKUP_ENCRYPTION_KEY` (sonst per HKDF aus `JWT_ACCESS_SECRET`). Nur versiegelte Dateien stellen Benutzer, Rollen, Webhooks und Audit-Log wieder her; Import verlangt Passwort (+ TOTP). Webhook-Secrets liegen verschlüsselt in der DB (Schlüssel aus `JWT_ACCESS_SECRET`) – für eine Wiederherstellung in einem anderen Deployment mit anderem `JWT_ACCESS_SECRET` müssen Webhook-Secrets und MFA neu eingerichtet werden.
+
 ## 7. Kubernetes
 
 `deploy/k8s/` enthält je Projekt: `deployment.yaml`, `service.yaml`, `ingress.yaml`, sowie `configmap.example.yaml` und `secret.example.yaml` (Platzhalter, keine echten Werte). Backend exponiert `GET /health` (liveness) und `GET /health/ready` (readiness, prüft DB-Verbindung). Beide Projekte je ein schlankes Multi-Stage-Dockerfile (Build-Stage mit vollem `node_modules`, Runtime-Stage mit `npm ci --omit=dev` bzw. Next.js `output: 'standalone'`).
@@ -119,3 +130,25 @@ Fachliche Annahmen, getroffen weil das Lastenheft an der Stelle keine eindeutige
 - **Restore:** Über `POST /backup/import` (bzw. den Import-Dialog unter Verwaltung > Backup) eine zuvor exportierte Bundle-Datei einspielen.
 
 Ein rohes `pg_dump`/PITR-Backup auf Infrastrukturebene bleibt als zusätzliche, komplementäre Absicherung für den Katastrophenfall (z. B. korrupte Datenbankdateien, nicht nur fachliche Daten) sinnvoll, ist aber nicht mehr der primäre, hier dokumentierte Mechanismus – die in-App-Lösung deckt den fachlichen Anwendungsfall "Daten sichern/übertragen" bereits vollständig ab.
+
+## 9. API-Sicherheit (Stand Oktober 2026)
+
+Grundlage: OWASP API Security Top 10 (2023) und OWASP ASVS Level 2. Umsetzung und Begründung je Punkt in `docs/pruefung-2026-09.md`, Abschnitt „API-Sicherheit“.
+
+| Bereich | Maßnahme |
+|---|---|
+| Authentifizierung | JWT mit festem Algorithmus, Issuer und Audience je Zweck; MFA (TOTP) mit Replay-Schutz; Kontosperre 15 min nach 5 Fehlversuchen; gleiche Antwort für unbekannte/gesperrte Konten; bcrypt auf jedem Pfad |
+| Passwörter | mind. 12 Zeichen, max. 72 Byte, Abgleich mit Have I Been Pwned (k-Anonymität, abschaltbar per `PASSWORD_BREACH_CHECK=false`) |
+| Sitzungen | Refresh-Rotation atomar, Diebstahlerkennung, max. 7 Tage; Einmal-Tokens für SSO-Abschluss und MFA-Schritt |
+| Step-up | Backup-Import, MFA ein/aus verlangen aktuelles Passwort (+ TOTP) |
+| Autorisierung | fail-closed `PermissionsGuard`; keine Rechteausweitung über Benutzer-/Rollenpflege; Suche nur über lesbare Objektarten |
+| Maschinen-Zugriff | API-Schlüssel nur als Hash, Scope-Allowlist (`shop-sync:read`), IP-Allowlist, widerrufbar, befristbar; Ersteller kann nur eigene Rechte vergeben |
+| Ausgehende Aufrufe | Webhooks: Ziel-IP beim Verbindungsaufbau geprüft (kein DNS-Rebinding), nur Port 80/443, https in Produktion, 5 s Timeout, Signatur über Zeitstempel+ID+Body |
+| Transport/Antworten | `Cache-Control: no-store` (außer öffentliche Chargen-Seite), CSP `default-src 'none'`, `frame-ancestors 'none'`, keine ETags; Produktion startet nur mit https-`FRONTEND_ORIGIN` und sicheren Cookies |
+| Rate-Limits | Throttler vor der Authentifizierung (100/min, Login/MFA/Refresh/Logout 10/min, öffentliche Chargen 30/min); Client-IP über `TRUST_PROXY` |
+| Daten | Backups verschlüsselt und signiert, Dateien 0600; CSV-Export ohne Formel-Injection; Logs ohne Query-Strings |
+
+**Bekannte Restpunkte (bewusst nicht umgesetzt):**
+
+- Rate-Limits zählen je Pod im Speicher; bei 2 Replikas verdoppelt sich das Limit. Brute-Force-Schutz hängt nicht daran, sondern an der Kontosperre in der DB. Ein gemeinsamer Speicher (Redis) wäre der nächste Schritt, falls Lastspitzen ein Thema werden.
+- Eine E-Mail-Änderung im eigenen Profil meldet „bereits vergeben“, wenn die Adresse existiert. Das erfordert eine Anmeldung plus aktuelles Passwort; eine generische Meldung würde Nutzer nur verwirren.

ApiCore-Backend/.env.example

@@ -9,9 +9,19 @@ JWT_ACCESS_SECRET="change-me-to-a-random-value-at-least-32-characters-long"
 JWT_REFRESH_SECRET="change-me-refresh-secret"
 JWT_ACCESS_EXPIRES_IN="15m"
 JWT_REFRESH_EXPIRES_IN="7d"
+# Hard limit from login, however often the session is refreshed.
+SESSION_MAX_AGE="7d"
+# New passwords are checked against known breaches (Have I Been Pwned,
+# k-anonymity: only 5 hash characters leave the server). "false" turns the
+# check off for deployments without internet access.
+# PASSWORD_BREACH_CHECK=true
 
 PORT=3001
 FRONTEND_ORIGIN="http://localhost:3000"
+# Reverse-proxy hops in front of the backend whose X-Forwarded-For is
+# trusted (client IP for rate limits and API-key IP allowlists). "1" for the
+# single K8s ingress; a list such as "loopback, 10.0.0.0/8" also works.
+TRUST_PROXY=1
 
 # Refresh-token cookie requires HTTPS by default. Set to "false" only for
 # local HTTP development - every real deployment must leave this unset (or
@@ -33,11 +43,19 @@ DOCUMENTS_STORAGE_PATH="./uploads"
 # ihre eigenen Backup-Dateien und die Lauf-Erkennung zwischen Replicas greift
 # nicht.
 BACKUP_STORAGE_PATH="./backups"
+# Directory a backup path set in the admin UI must stay under (the env
+# variable above is not restricted). Default "./backups".
+# BACKUP_ROOT="./backups"
 # Cron-Ausdruck (Standard: taeglich um 03:00 Uhr).
 BACKUP_CRON_SCHEDULE="0 3 * * *"
 # Wie viele der neuesten Backup-Dateien behalten werden, aeltere werden nach
 # jedem Lauf geloescht (Standard: 14).
 BACKUP_RETENTION_COUNT=14
+# Backups are encrypted (AES-256-GCM). Without this key they are sealed with a
+# key derived from JWT_ACCESS_SECRET and restore only into this deployment.
+# Set the same value on another deployment to restore there. At least 32
+# characters, e.g. "openssl rand -hex 32". Keep it outside the backup storage.
+# BACKUP_ENCRYPTION_KEY=""
 
 # Entra ID SSO. Ohne alle vier Werte bleibt SSO deaktiviert
 # (GET /api/v1/auth/sso/status meldet enabled: false, kein Fehler beim Start).

ApiCore-Backend/prisma/migrations/20260927031004_idempotency_and_automation_task_source/migration.sql

@@ -0,0 +1,29 @@
+-- CreateEnum
+CREATE TYPE "IdempotencyStatus" AS ENUM ('PENDING', 'COMPLETED');
+
+-- AlterTable
+ALTER TABLE "Task" ADD COLUMN     "sourceAutomationTrigger" "AutomationTriggerType";
+
+-- CreateTable
+CREATE TABLE "IdempotencyRecord" (
+    "id" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "key" TEXT NOT NULL,
+    "scope" TEXT NOT NULL,
+    "status" "IdempotencyStatus" NOT NULL DEFAULT 'PENDING',
+    "statusCode" INTEGER,
+    "responseBody" JSONB,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "IdempotencyRecord_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "IdempotencyRecord_createdAt_idx" ON "IdempotencyRecord"("createdAt");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "IdempotencyRecord_userId_key_key" ON "IdempotencyRecord"("userId", "key");
+
+-- CreateIndex
+CREATE INDEX "Task_sourceAutomationTrigger_relatedType_relatedId_status_idx" ON "Task"("sourceAutomationTrigger", "relatedType", "relatedId", "status");

ApiCore-Backend/prisma/migrations/20260927231113_add_api_keys/migration.sql

@@ -0,0 +1,24 @@
+-- CreateTable
+CREATE TABLE "ApiKey" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "prefix" TEXT NOT NULL,
+    "keyHash" TEXT NOT NULL,
+    "scopes" TEXT[],
+    "createdByUserId" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "lastUsedAt" TIMESTAMP(3),
+    "expiresAt" TIMESTAMP(3),
+    "revokedAt" TIMESTAMP(3),
+
+    CONSTRAINT "ApiKey_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "ApiKey_keyHash_key" ON "ApiKey"("keyHash");
+
+-- CreateIndex
+CREATE INDEX "ApiKey_revokedAt_idx" ON "ApiKey"("revokedAt");
+
+-- AddForeignKey
+ALTER TABLE "ApiKey" ADD CONSTRAINT "ApiKey_createdByUserId_fkey" FOREIGN KEY ("createdByUserId") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;

ApiCore-Backend/prisma/migrations/20260928040804_label_template_crop_marks/migration.sql

@@ -0,0 +1,3 @@
+-- AlterTable
+ALTER TABLE "LabelTemplate" ADD COLUMN     "cropMarks" BOOLEAN NOT NULL DEFAULT true;
+

ApiCore-Backend/prisma/migrations/20260928042023_follow_up_triggers/migration.sql

@@ -0,0 +1,11 @@
+-- AlterEnum
+-- This migration adds more than one value to an enum.
+-- With PostgreSQL versions 11 and earlier, this is not possible
+-- in a single migration. This can be worked around by creating
+-- multiple migrations, each migration adding only one value to
+-- the enum.
+
+
+ALTER TYPE "AutomationTriggerType" ADD VALUE 'TREATMENT_FOLLOW_UP';
+ALTER TYPE "AutomationTriggerType" ADD VALUE 'FEEDING_FOLLOW_UP';
+

ApiCore-Backend/prisma/migrations/20260928043245_bestandsbuch_fields/migration.sql

@@ -0,0 +1,13 @@
+-- AlterTable
+ALTER TABLE "SiteSettings" ADD COLUMN     "holderAddress" TEXT,
+ADD COLUMN     "holderName" TEXT;
+
+-- AlterTable
+ALTER TABLE "Treatment" ADD COLUMN     "apiaryId" TEXT,
+ADD COLUMN     "prescribingVet" TEXT,
+ADD COLUMN     "purchaseProof" TEXT,
+ADD COLUMN     "supplier" TEXT;
+
+-- AddForeignKey
+ALTER TABLE "Treatment" ADD CONSTRAINT "Treatment_apiaryId_fkey" FOREIGN KEY ("apiaryId") REFERENCES "Apiary"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+

ApiCore-Backend/prisma/migrations/20260928091348_winter_checks/migration.sql

@@ -0,0 +1,60 @@
+-- CreateEnum
+CREATE TYPE "WinterCheckSeason" AS ENUM ('AUTUMN', 'SPRING');
+
+-- CreateEnum
+CREATE TYPE "WinterOutcome" AS ENUM ('SURVIVED', 'WEAK', 'LOST');
+
+-- CreateEnum
+CREATE TYPE "ColonyLossCause" AS ENUM ('DEAD_OR_EMPTY', 'QUEEN_PROBLEM', 'NATURAL_DISASTER');
+
+-- CreateTable
+CREATE TABLE "WinterCheck" (
+    "id" TEXT NOT NULL,
+    "colonyId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "winterYear" INTEGER NOT NULL,
+    "season" "WinterCheckSeason" NOT NULL,
+    "date" TIMESTAMP(3) NOT NULL,
+    "occupiedSeams" INTEGER,
+    "feedStockKg" DOUBLE PRECISION,
+    "queenPresent" BOOLEAN,
+    "outcome" "WinterOutcome",
+    "lossCause" "ColonyLossCause",
+    "notes" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "WinterCheck_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "WinterCheck_winterYear_idx" ON "WinterCheck"("winterYear");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "WinterCheck_colonyId_winterYear_season_key" ON "WinterCheck"("colonyId", "winterYear", "season");
+
+-- AddForeignKey
+ALTER TABLE "WinterCheck" ADD CONSTRAINT "WinterCheck_colonyId_fkey" FOREIGN KEY ("colonyId") REFERENCES "Colony"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "WinterCheck" ADD CONSTRAINT "WinterCheck_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- Permissions: the boot-time catalog sync only grants new permissions to
+-- system roles (ADMIN). Winter checks are everyday beekeeping records, so the
+-- other roles get the same access they have to inspections.
+INSERT INTO "Permission" (id, key, resource, action, "labelDe", "groupDe", "sortOrder")
+VALUES
+  (gen_random_uuid()::text, 'winter-checks:read', 'winter-checks', 'read', 'Ansehen', 'Überwinterung', 850),
+  (gen_random_uuid()::text, 'winter-checks:create', 'winter-checks', 'create', 'Anlegen', 'Überwinterung', 851),
+  (gen_random_uuid()::text, 'winter-checks:update', 'winter-checks', 'update', 'Bearbeiten', 'Überwinterung', 852)
+ON CONFLICT (key) DO NOTHING;
+
+INSERT INTO "RolePermission" ("roleId", "permissionId", "grantedAt")
+SELECT r.id, p.id, now()
+FROM "Role" r, "Permission" p
+WHERE p.resource = 'winter-checks'
+  AND (
+    r.key IN ('ADMIN', 'BEEKEEPER', 'STAFF')
+    OR (r.key IN ('READONLY', 'API_CLIENT') AND p.action = 'read')
+  )
+ON CONFLICT DO NOTHING;

ApiCore-Backend/prisma/migrations/20261001090000_sso_subject_and_email_case/migration.sql

@@ -0,0 +1,15 @@
+-- Microsoft sign-in is bound to the IdP identity ("<iss>|<oid>"), set on the
+-- first SSO login; the unverified email claim no longer picks the account.
+ALTER TABLE "User" ADD COLUMN "ssoSubject" TEXT;
+CREATE UNIQUE INDEX "User_ssoSubject_key" ON "User"("ssoSubject");
+
+-- Emails are compared case-insensitively from now on. Store existing ones
+-- lower-case, except where that would collide with another account - those
+-- stay as they are and are still found by the case-insensitive lookup.
+UPDATE "User" AS u
+SET "email" = lower(u."email")
+WHERE u."email" <> lower(u."email")
+  AND NOT EXISTS (
+    SELECT 1 FROM "User" AS o
+    WHERE o."id" <> u."id" AND lower(o."email") = lower(u."email")
+  );

ApiCore-Backend/prisma/migrations/20261001100000_auth_lockout_totp_replay/migration.sql

@@ -0,0 +1,5 @@
+-- TOTP replay protection and per-account lockout after failed attempts.
+ALTER TABLE "User" ADD COLUMN "mfaLastTimeStep" INTEGER;
+ALTER TABLE "User" ADD COLUMN "failedAuthAttempts" INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE "User" ADD COLUMN "authLockedUntil" TIMESTAMP(3);
+ALTER TYPE "AuditAction" ADD VALUE 'ACCOUNT_LOCKED';

ApiCore-Backend/prisma/migrations/20261001110000_refresh_session_start/migration.sql

@@ -0,0 +1,3 @@
+-- Absolute session lifetime: every rotated refresh token keeps the time
+-- the session was first opened. Existing sessions count from now.
+ALTER TABLE "RefreshToken" ADD COLUMN "sessionStartedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP;

ApiCore-Backend/prisma/migrations/20261001120000_api_key_ip_allowlist/migration.sql

@@ -0,0 +1,3 @@
+-- API keys can be limited to source addresses (IP or CIDR).
+ALTER TABLE "ApiKey" ADD COLUMN "allowedIps" TEXT[] DEFAULT ARRAY[]::TEXT[];
+ALTER TABLE "ApiKey" ADD COLUMN "lastUsedIp" TEXT;

ApiCore-Backend/prisma/migrations/20261001130000_consumed_tokens/migration.sql

@@ -0,0 +1,8 @@
+-- One-time helper tokens (SSO completion, MFA challenge) are recorded once
+-- used; a second use of the same jti is refused.
+CREATE TABLE "ConsumedToken" (
+    "jti" TEXT NOT NULL,
+    "expiresAt" TIMESTAMP(3) NOT NULL,
+    CONSTRAINT "ConsumedToken_pkey" PRIMARY KEY ("jti")
+);
+CREATE INDEX "ConsumedToken_expiresAt_idx" ON "ConsumedToken"("expiresAt");

ApiCore-Backend/prisma/schema.prisma

@@ -80,6 +80,14 @@ model User {
   // src/auth/mfa/mfa-crypto.util.ts), nie im Klartext in der DB.
   mfaEnabled Boolean @default(false)
   mfaSecret  String?
+  // Zuletzt angenommener TOTP-Zeitschritt: derselbe Code (oder ein aelterer)
+  // wird danach nie wieder akzeptiert (Replay-Schutz).
+  mfaLastTimeStep Int?
+
+  // Fehlversuche (Passwort, MFA-Code, Bestaetigung) seit dem letzten Erfolg;
+  // ab 5 ist das Konto bis authLockedUntil gesperrt.
+  failedAuthAttempts Int       @default(0)
+  authLockedUntil    DateTime?
   avatarPath String?
 
   // Gesetzt bei jedem Passwortwechsel; JwtAuthGuard verwirft Access-Tokens,
@@ -88,11 +96,17 @@ model User {
   // nach einer Passwortaenderung nicht bis zu 15 Minuten weiter funktioniert.
   passwordChangedAt DateTime?
 
+  // Unveraenderliche Identitaet beim Identity Provider ("<iss>|<oid>"),
+  // gesetzt bei der ersten Microsoft-Anmeldung. Danach entscheidet nur sie,
+  // nicht mehr der (unverifizierte) E-Mail-Claim, welches Konto sich anmeldet.
+  ssoSubject String? @unique
+
   refreshTokens RefreshToken[]
 
   inspections           Inspection[]
   varroaMeasurements    VarroaMeasurement[]
   swarmControlChecks    SwarmControlCheck[]
+  winterChecks          WinterCheck[]
   treatments            Treatment[]
   feedings              Feeding[]
   harvests              Harvest[]
@@ -111,10 +125,47 @@ model User {
   webhookSubscriptions  WebhookSubscription[]
   documents             Document[]
   honeyBatchRelocations HoneyBatchRelocation[]
+  apiKeys               ApiKey[]
 
   @@index([roleId])
 }
 
+// Schlüssel für Maschinen-Zugriffe (z. B. Wabenhain-Shop-Sync) statt eines
+// Service-Kontos mit Passwort. Gespeichert wird nur der SHA-256-Hash des
+// Schlüssels; der Klartext wird genau einmal bei der Erstellung angezeigt.
+// Ein Schlüssel ist kein Benutzer: er darf nur die Routen, deren
+// Berechtigung in `scopes` steht (siehe api-keys/api-key-scopes.ts).
+model ApiKey {
+  id              String    @id @default(cuid())
+  name            String
+  // Anfang des Schlüssels ("ack_ab12cd34") - zum Wiedererkennen in der
+  // Liste, ohne den Schlüssel selbst zu speichern.
+  prefix          String
+  keyHash         String    @unique
+  scopes          String[]
+  createdByUserId String?
+  createdByUser   User?     @relation(fields: [createdByUserId], references: [id])
+  createdAt       DateTime  @default(now())
+  lastUsedAt      DateTime?
+  // Absender-IP der letzten Nutzung - hilft beim Einrichten der Allowlist.
+  lastUsedIp      String?
+  // Nur von diesen Adressen/Netzen (IP oder CIDR) gueltig; leer = ueberall.
+  allowedIps      String[]  @default([])
+  expiresAt       DateTime?
+  revokedAt       DateTime?
+
+  @@index([revokedAt])
+}
+
+// Einmal-Tokens (SSO-Abschluss, MFA-Zwischenschritt), die schon benutzt
+// wurden. Ein zweiter Versuch mit derselben jti wird abgelehnt.
+model ConsumedToken {
+  jti       String   @id
+  expiresAt DateTime
+
+  @@index([expiresAt])
+}
+
 model RefreshToken {
   id        String    @id @default(cuid())
   userId    String
@@ -123,6 +174,9 @@ model RefreshToken {
   expiresAt DateTime
   createdAt DateTime  @default(now())
   revokedAt DateTime?
+  // Anmeldezeitpunkt der Sitzung, an jede rotierte Nachfolge-Token vererbt:
+  // spaetestens SESSION_MAX_AGE danach ist neu anzumelden.
+  sessionStartedAt DateTime @default(now())
 
   @@index([userId])
 }
@@ -138,6 +192,7 @@ enum AuditAction {
   TOKEN_REFRESHED
   MFA_ENABLED
   MFA_DISABLED
+  ACCOUNT_LOCKED
 }
 
 model AuditLog {
@@ -181,6 +236,7 @@ model Apiary {
   colonies    Colony[]
   colonyMoves ColonyApiaryHistory[]
   harvests    Harvest[]
+  treatments  Treatment[]
 
   @@index([status])
 }
@@ -245,6 +301,7 @@ model Colony {
   inspections        Inspection[]
   varroaMeasurements VarroaMeasurement[]
   swarmControlChecks SwarmControlCheck[]
+  winterChecks       WinterCheck[]
   treatments         Treatment[]
   feedings           Feeding[]
   harvests           HarvestColony[]
@@ -460,11 +517,17 @@ model Task {
   sourceInspection        Inspection?            @relation(fields: [sourceInspectionId], references: [id])
   sourceTemplateId        String?
   sourceTemplate          TaskTemplate?          @relation(fields: [sourceTemplateId], references: [id])
+  // Set when an automation rule created the task (not a person). Keeps an
+  // automatic suggestion distinguishable from a planned task, and lets the
+  // rule see that it already left an open task for the same object instead
+  // of piling up a duplicate on every further trigger.
+  sourceAutomationTrigger AutomationTriggerType?
   createdAt               DateTime               @default(now())
   completedAt             DateTime?
 
   @@index([status, dueDate])
   @@index([relatedType, relatedId])
+  @@index([sourceAutomationTrigger, relatedType, relatedId, status])
 }
 
 enum TaskTemplateRecurrenceType {
@@ -564,6 +627,54 @@ model SwarmControlCheck {
   @@index([colonyId, date])
 }
 
+// ---------------------------------------------------------------------------
+// Ein- und Auswinterung, Winterverluste
+// ---------------------------------------------------------------------------
+
+enum WinterCheckSeason {
+  AUTUMN // Einwinterung
+  SPRING // Auswinterung
+}
+
+enum WinterOutcome {
+  SURVIVED
+  WEAK
+  LOST
+}
+
+// Verlustkategorien des COLOSS-Monitorings: totes/leeres Volk, unloesbares
+// Koeniginnenproblem, Naturereignis. Bewusst keine Diagnose (Varroa, Virus
+// ...): die gehoert, wenn ueberhaupt bekannt, in die Notiz.
+enum ColonyLossCause {
+  DEAD_OR_EMPTY
+  QUEEN_PROBLEM
+  NATURAL_DISASTER
+}
+
+// Eine Einwinterung und eine Auswinterung je Volk und Winter. winterYear ist
+// das Jahr, in dem der Winter beginnt (Winter 2026/27 = 2026).
+model WinterCheck {
+  id            String            @id @default(cuid())
+  colonyId      String
+  colony        Colony            @relation(fields: [colonyId], references: [id])
+  userId        String
+  user          User              @relation(fields: [userId], references: [id])
+  winterYear    Int
+  season        WinterCheckSeason
+  date          DateTime
+  occupiedSeams Int?
+  feedStockKg   Float?
+  queenPresent  Boolean?
+  outcome       WinterOutcome?
+  lossCause     ColonyLossCause?
+  notes         String?
+  createdAt     DateTime          @default(now())
+  updatedAt     DateTime          @updatedAt
+
+  @@unique([colonyId, winterYear, season])
+  @@index([winterYear])
+}
+
 // ---------------------------------------------------------------------------
 // Behandlung / Tierarzneimittel (Abschnitt 4.11)
 // ---------------------------------------------------------------------------
@@ -585,6 +696,14 @@ model Treatment {
   batchNumber          String?
   notes                String?
   withdrawalPeriodDays Int?
+  // Bestandsbuch (Art. 108 VO (EU) 2019/6): where the colony stood on the
+  // day of the treatment - kept with the treatment because the colony may
+  // be moved later - and the supplier / purchase proof / prescribing vet.
+  apiaryId             String?
+  apiary               Apiary?   @relation(fields: [apiaryId], references: [id])
+  supplier             String?
+  purchaseProof        String?
+  prescribingVet       String?
   createdAt            DateTime  @default(now())
 
   @@index([colonyId, date])
@@ -899,6 +1018,10 @@ model LabelTemplate {
   marginLeftMm Float    @default(5)
   gapXMm       Float    @default(2)
   gapYMm       Float    @default(2)
+  // Kleine Schnittmarken im Blattrand, eine an jedem Ende jeder
+  // Schnittlinie - zum Anlegen am Papierschneider. Aus bei vorgestanzten
+  // Etikettenbögen, die nicht geschnitten werden.
+  cropMarks    Boolean  @default(true)
   isDefault    Boolean  @default(false)
   active       Boolean  @default(true)
   createdAt    DateTime @default(now())
@@ -1040,6 +1163,8 @@ enum AutomationTriggerType {
   STOCK_ITEM_LOW
   HONEY_BATCH_NUMBER_FORMAT
   BOTTLING_LOT_NUMBER_FORMAT
+  TREATMENT_FOLLOW_UP
+  FEEDING_FOLLOW_UP
 }
 
 model AutomationRule {
@@ -1071,6 +1196,10 @@ model SiteSettings {
   instagramUrl  String?
   tiktokUrl     String?
   websiteUrl    String?
+  // Name and address of the bee keeper, printed on the Bestandsbuch. Never
+  // part of any public page.
+  holderName    String?
+  holderAddress String?
   updatedAt     DateTime @updatedAt
 }
 
@@ -1136,6 +1265,37 @@ model CalendarSyncSettings {
 // erneutes Enqueue (z. B. nach einer Aufgaben-Änderung) aktualisiert das
 // bestehende Graph-Event über die gespeicherte graphEventId, statt ein
 // Duplikat anzulegen.
+// ---------------------------------------------------------------------------
+// Idempotenz – schützt Anlege-Anfragen vor doppelter Ausführung, wenn ein
+// Client dieselbe Anfrage wiederholt (Offline-Warteschlange nach verlorener
+// Antwort, Netzabbruch, erneutes Absenden). Der Client schickt pro fachlichem
+// Vorgang einen eindeutigen `Idempotency-Key`; eine Wiederholung bekommt die
+// gespeicherte erste Antwort statt eines zweiten Datensatzes. Siehe
+// src/common/idempotency/idempotency.interceptor.ts.
+// ---------------------------------------------------------------------------
+
+enum IdempotencyStatus {
+  PENDING
+  COMPLETED
+}
+
+model IdempotencyRecord {
+  id           String            @id @default(cuid())
+  userId       String
+  key          String
+  // "POST /api/v1/inspections" - a key reused for a different endpoint is
+  // rejected instead of replaying an unrelated response.
+  scope        String
+  status       IdempotencyStatus @default(PENDING)
+  statusCode   Int?
+  responseBody Json?
+  createdAt    DateTime          @default(now())
+  updatedAt    DateTime          @updatedAt
+
+  @@unique([userId, key])
+  @@index([createdAt])
+}
+
 model CalendarSyncOutboxEntry {
   id           String                 @id @default(cuid())
   sourceType   CalendarSyncSourceType

ApiCore-Backend/src/api-keys/api-key-scopes.ts

@@ -0,0 +1,18 @@
+import { PermissionKey } from '../auth/permissions/permission-catalog';
+
+/**
+ * Permissions an API key may carry. Deliberately a short allowlist of
+ * read-only permissions, not the whole catalog: a key is a long-lived secret
+ * stored in another system, so it only ever gets what a machine integration
+ * needs. Removing an entry here also takes it away from existing keys (see
+ * ApiKeysService.authenticate).
+ */
+export const API_KEY_SCOPES = [
+  'shop-sync:read',
+] as const satisfies readonly PermissionKey[];
+
+export type ApiKeyScope = (typeof API_KEY_SCOPES)[number];
+
+export function isApiKeyScope(value: string): value is ApiKeyScope {
+  return (API_KEY_SCOPES as readonly string[]).includes(value);
+}

ApiCore-Backend/src/api-keys/api-keys.controller.ts

@@ -0,0 +1,53 @@
+import { Body, Controller, Get, Param, Patch, Post } from '@nestjs/common';
+import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
+import { RequirePermission } from '../auth/decorators/require-permission.decorator';
+import { CurrentUser } from '../auth/decorators/current-user.decorator';
+import type { AuthenticatedUser } from '../auth/types/authenticated-user';
+import { CreateApiKeyDto } from './dto/create-api-key.dto';
+import { UpdateApiKeyDto } from './dto/update-api-key.dto';
+import {
+  ApiKeySummary,
+  ApiKeysService,
+  CreatedApiKey,
+} from './api-keys.service';
+
+@ApiTags('api-keys')
+@ApiBearerAuth()
+@Controller('api-keys')
+export class ApiKeysController {
+  constructor(private readonly apiKeys: ApiKeysService) {}
+
+  @RequirePermission('api-keys:manage')
+  @Get()
+  findAll(): Promise<ApiKeySummary[]> {
+    return this.apiKeys.findAll();
+  }
+
+  @RequirePermission('api-keys:manage')
+  @Post()
+  create(
+    @Body() dto: CreateApiKeyDto,
+    @CurrentUser() actor: AuthenticatedUser,
+  ): Promise<CreatedApiKey> {
+    return this.apiKeys.create(dto, actor.id);
+  }
+
+  @RequirePermission('api-keys:manage')
+  @Patch(':id')
+  updateAllowedIps(
+    @Param('id') id: string,
+    @Body() dto: UpdateApiKeyDto,
+    @CurrentUser() actor: AuthenticatedUser,
+  ): Promise<ApiKeySummary> {
+    return this.apiKeys.updateAllowedIps(id, dto, actor.id);
+  }
+
+  @RequirePermission('api-keys:manage')
+  @Post(':id/revoke')
+  revoke(
+    @Param('id') id: string,
+    @CurrentUser() actor: AuthenticatedUser,
+  ): Promise<ApiKeySummary> {
+    return this.apiKeys.revoke(id, actor.id);
+  }
+}

ApiCore-Backend/src/api-keys/api-keys.module.ts

@@ -0,0 +1,12 @@
+import { Global, Module } from '@nestjs/common';
+import { ApiKeysController } from './api-keys.controller';
+import { ApiKeysService } from './api-keys.service';
+
+// Global: the app-wide auth guards need ApiKeysService to recognise keys.
+@Global()
+@Module({
+  controllers: [ApiKeysController],
+  providers: [ApiKeysService],
+  exports: [ApiKeysService],
+})
+export class ApiKeysModule {}

ApiCore-Backend/src/api-keys/api-keys.service.ts

@@ -0,0 +1,232 @@
+import {
+  ForbiddenException,
+  Injectable,
+  Logger,
+  NotFoundException,
+} from '@nestjs/common';
+import { createHash, randomBytes, randomInt } from 'node:crypto';
+import { PrismaService } from '../prisma/prisma.service';
+import { AuditLogService } from '../audit/audit-log.service';
+import { ApiKey } from '../../generated/prisma';
+import { CreateApiKeyDto } from './dto/create-api-key.dto';
+import { ApiKeyScope, isApiKeyScope } from './api-key-scopes';
+import { UpdateApiKeyDto } from './dto/update-api-key.dto';
+import { isIpAllowed, normalizeAllowlistEntry } from './ip-allowlist';
+import { PermissionResolverService } from '../auth/permissions/permission-resolver.service';
+
+function normalizeAllowlist(entries: readonly string[] | undefined): string[] {
+  return [
+    ...new Set(
+      (entries ?? [])
+        .map(normalizeAllowlistEntry)
+        .filter((entry): entry is string => entry !== null),
+    ),
+  ];
+}
+
+// ack_<8 lowercase chars>_<32 random bytes, base64url>
+const TOKEN_PATTERN = /^ack_[a-z0-9]{8}_[A-Za-z0-9_-]{43}$/;
+const PREFIX_ALPHABET = 'abcdefghijklmnopqrstuvwxyz0123456789';
+// lastUsedAt is informational; writing it on every request would turn each
+// read into a write for no benefit.
+const LAST_USED_RESOLUTION_MS = 5 * 60 * 1000;
+
+/** What a request authenticated by an API key may do - it is not a user. */
+export interface ApiKeyPrincipal {
+  id: string;
+  scopes: ApiKeyScope[];
+}
+
+/** An API key as shown in the admin UI - never the hash or the key itself. */
+export type ApiKeySummary = Omit<ApiKey, 'keyHash'>;
+
+export interface CreatedApiKey {
+  apiKey: ApiKeySummary;
+  /** The only time the plain key exists outside the caller's system. */
+  token: string;
+}
+
+function hashToken(token: string): string {
+  return createHash('sha256').update(token).digest('hex');
+}
+
+function randomPrefix(): string {
+  let prefix = '';
+  for (let i = 0; i < 8; i++) {
+    prefix += PREFIX_ALPHABET[randomInt(PREFIX_ALPHABET.length)];
+  }
+  return `ack_${prefix}`;
+}
+
+function toSummary(apiKey: ApiKey): ApiKeySummary {
+  const { keyHash, ...summary } = apiKey;
+  void keyHash;
+  return summary;
+}
+
+@Injectable()
+export class ApiKeysService {
+  private readonly logger = new Logger(ApiKeysService.name);
+
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly auditLog: AuditLogService,
+    private readonly permissionResolver: PermissionResolverService,
+  ) {}
+
+  async findAll(): Promise<ApiKeySummary[]> {
+    const keys = await this.prisma.apiKey.findMany({
+      orderBy: { createdAt: 'desc' },
+    });
+    return keys.map(toSummary);
+  }
+
+  async create(
+    dto: CreateApiKeyDto,
+    actingUserId: string,
+  ): Promise<CreatedApiKey> {
+    // Nobody hands a machine more than they may do themselves.
+    const callerPermissions =
+      await this.permissionResolver.getPermissions(actingUserId);
+    const missing = dto.scopes.filter((scope) => !callerPermissions.has(scope));
+    if (missing.length > 0) {
+      throw new ForbiddenException(
+        `Diese Berechtigung haben Sie selbst nicht: ${missing.join(', ')}`,
+      );
+    }
+    const prefix = randomPrefix();
+    // 32 random bytes: a plain hash of it is safe to store without a slow
+    // KDF - there is nothing guessable to brute-force.
+    const token = `${prefix}_${randomBytes(32).toString('base64url')}`;
+    const expiresAt =
+      dto.expiresInDays !== undefined
+        ? new Date(Date.now() + dto.expiresInDays * 24 * 60 * 60 * 1000)
+        : null;
+
+    const apiKey = await this.prisma.apiKey.create({
+      data: {
+        name: dto.name.trim(),
+        prefix,
+        keyHash: hashToken(token),
+        scopes: [...new Set(dto.scopes)],
+        allowedIps: normalizeAllowlist(dto.allowedIps),
+        expiresAt,
+        createdByUserId: actingUserId,
+      },
+    });
+    const summary = toSummary(apiKey);
+    await this.auditLog.record({
+      entityType: 'ApiKey',
+      entityId: apiKey.id,
+      action: 'CREATE',
+      userId: actingUserId,
+      afterData: summary,
+    });
+    return { apiKey: summary, token };
+  }
+
+  /** Changes where a key may be used from, without issuing a new one. */
+  async updateAllowedIps(
+    id: string,
+    dto: UpdateApiKeyDto,
+    actingUserId: string,
+  ): Promise<ApiKeySummary> {
+    const before = await this.prisma.apiKey.findUnique({ where: { id } });
+    if (!before) {
+      throw new NotFoundException('API-Schlüssel nicht gefunden');
+    }
+    const updated = await this.prisma.apiKey.update({
+      where: { id },
+      data: { allowedIps: normalizeAllowlist(dto.allowedIps) },
+    });
+    await this.auditLog.record({
+      entityType: 'ApiKey',
+      entityId: id,
+      action: 'UPDATE',
+      userId: actingUserId,
+      beforeData: toSummary(before),
+      afterData: toSummary(updated),
+    });
+    return toSummary(updated);
+  }
+
+  async revoke(id: string, actingUserId: string): Promise<ApiKeySummary> {
+    const before = await this.prisma.apiKey.findUnique({ where: { id } });
+    if (!before) {
+      throw new NotFoundException('API-Schlüssel nicht gefunden');
+    }
+    if (before.revokedAt) {
+      return toSummary(before);
+    }
+    const revoked = await this.prisma.apiKey.update({
+      where: { id },
+      data: { revokedAt: new Date() },
+    });
+    await this.auditLog.record({
+      entityType: 'ApiKey',
+      entityId: id,
+      action: 'DEACTIVATE',
+      userId: actingUserId,
+      beforeData: toSummary(before),
+      afterData: toSummary(revoked),
+    });
+    return toSummary(revoked);
+  }
+
+  /**
+   * Resolves a presented key to what it may do, or null for anything that
+   * must not pass: malformed, unknown, revoked or expired.
+   */
+  async authenticate(
+    token: string,
+    clientIp?: string,
+  ): Promise<ApiKeyPrincipal | null> {
+    if (!TOKEN_PATTERN.test(token)) {
+      return null;
+    }
+    const apiKey = await this.prisma.apiKey.findUnique({
+      where: { keyHash: hashToken(token) },
+    });
+    const now = new Date();
+    if (
+      !apiKey ||
+      apiKey.revokedAt ||
+      (apiKey.expiresAt && apiKey.expiresAt <= now)
+    ) {
+      return null;
+    }
+    if (!isIpAllowed(clientIp, apiKey.allowedIps)) {
+      // The key itself is right: say so, so the admin finds the cause - a
+      // thief learns nothing new, they already hold the key.
+      this.logger.warn(
+        `API key ${apiKey.prefix} used from ${clientIp ?? 'unknown'}, not in its allowlist`,
+      );
+      throw new ForbiddenException(
+        'API-Schlüssel ist für diese IP-Adresse nicht freigegeben',
+      );
+    }
+    if (
+      !apiKey.lastUsedAt ||
+      now.getTime() - apiKey.lastUsedAt.getTime() > LAST_USED_RESOLUTION_MS ||
+      apiKey.lastUsedIp !== (clientIp ?? null)
+    ) {
+      await this.prisma.apiKey.update({
+        where: { id: apiKey.id },
+        data: { lastUsedAt: now, lastUsedIp: clientIp ?? null },
+      });
+    }
+    // Intersect with today's allowlist: narrowing it later also narrows
+    // keys issued before.
+    return { id: apiKey.id, scopes: apiKey.scopes.filter(isApiKeyScope) };
+  }
+}
+
+/** The key from an `Authorization: Bearer ack_…` header, or null. */
+export function extractApiKeyToken(
+  authorization: string | undefined,
+): string | null {
+  if (!authorization?.startsWith('Bearer ack_')) {
+    return null;
+  }
+  return authorization.slice('Bearer '.length).trim();
+}

ApiCore-Backend/src/api-keys/dto/allowed-ips.validator.ts

@@ -0,0 +1,17 @@
+import {
+  ValidationArguments,
+  ValidatorConstraint,
+  ValidatorConstraintInterface,
+} from 'class-validator';
+import { normalizeAllowlistEntry } from '../ip-allowlist';
+
+@ValidatorConstraint({ name: 'allowedIp' })
+export class AllowedIpConstraint implements ValidatorConstraintInterface {
+  validate(value: unknown): boolean {
+    return typeof value === 'string' && normalizeAllowlistEntry(value) !== null;
+  }
+
+  defaultMessage(args: ValidationArguments): string {
+    return `${String(args.value)} ist keine IP-Adresse und kein Netz (z. B. 203.0.113.7 oder 203.0.113.0/24)`;
+  }
+}

ApiCore-Backend/src/api-keys/dto/create-api-key.dto.ts

@@ -0,0 +1,58 @@
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+import {
+  ArrayMaxSize,
+  ArrayMinSize,
+  ArrayUnique,
+  IsArray,
+  IsIn,
+  IsInt,
+  IsOptional,
+  IsString,
+  Max,
+  MaxLength,
+  Min,
+  MinLength,
+  Validate,
+} from 'class-validator';
+import { API_KEY_SCOPES } from '../api-key-scopes';
+import { MAX_ALLOWED_IPS } from '../ip-allowlist';
+import { AllowedIpConstraint } from './allowed-ips.validator';
+
+export class CreateApiKeyDto {
+  @ApiProperty({
+    description: 'Wofür der Schlüssel ist, z. B. "Wabenhain-Shop"',
+  })
+  @IsString()
+  @MinLength(1)
+  @MaxLength(80)
+  name!: string;
+
+  @ApiProperty({ enum: API_KEY_SCOPES, isArray: true })
+  @IsArray()
+  @ArrayMinSize(1)
+  @ArrayUnique()
+  @IsIn(API_KEY_SCOPES, { each: true })
+  scopes!: string[];
+
+  @ApiPropertyOptional({
+    description:
+      'Gültigkeit in Tagen; ohne Angabe gilt der Schlüssel bis zum Widerruf',
+  })
+  @IsOptional()
+  @IsInt()
+  @Min(1)
+  @Max(730)
+  expiresInDays?: number;
+
+  @ApiPropertyOptional({
+    description:
+      'Erlaubte Absender (IP oder CIDR), z. B. die Adresse des Wabenhain-Servers',
+    type: [String],
+  })
+  @IsOptional()
+  @IsArray()
+  @ArrayMaxSize(MAX_ALLOWED_IPS)
+  @IsString({ each: true })
+  @Validate(AllowedIpConstraint, { each: true })
+  allowedIps?: string[];
+}

ApiCore-Backend/src/api-keys/dto/update-api-key.dto.ts

@@ -0,0 +1,17 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { ArrayMaxSize, IsArray, IsString, Validate } from 'class-validator';
+import { MAX_ALLOWED_IPS } from '../ip-allowlist';
+import { AllowedIpConstraint } from './allowed-ips.validator';
+
+export class UpdateApiKeyDto {
+  @ApiProperty({
+    description:
+      'Erlaubte Absender (IP oder CIDR); leere Liste = von überall nutzbar',
+    type: [String],
+  })
+  @IsArray()
+  @ArrayMaxSize(MAX_ALLOWED_IPS)
+  @IsString({ each: true })
+  @Validate(AllowedIpConstraint, { each: true })
+  allowedIps!: string[];
+}

ApiCore-Backend/src/api-keys/ip-allowlist.spec.ts

@@ -0,0 +1,34 @@
+import { isIpAllowed, normalizeAllowlistEntry } from './ip-allowlist';
+
+describe('ip-allowlist', () => {
+  it('normalizes addresses and networks', () => {
+    expect(normalizeAllowlistEntry(' 203.0.113.7 ')).toBe('203.0.113.7');
+    expect(normalizeAllowlistEntry('203.0.113.0/24')).toBe('203.0.113.0/24');
+    expect(normalizeAllowlistEntry('2001:db8::/32')).toBe('2001:db8::/32');
+    expect(normalizeAllowlistEntry('::ffff:203.0.113.7')).toBe('203.0.113.7');
+  });
+
+  it('rejects anything else', () => {
+    for (const entry of [
+      '',
+      'example.com',
+      '203.0.113.0/33',
+      '1.2.3.4/x',
+      '1.2.3.4/8/1',
+    ]) {
+      expect(normalizeAllowlistEntry(entry)).toBeNull();
+    }
+  });
+
+  it('allows every address when the list is empty', () => {
+    expect(isIpAllowed('198.51.100.1', [])).toBe(true);
+  });
+
+  it('allows only listed addresses and networks', () => {
+    const list = ['203.0.113.7', '198.51.100.0/24'];
+    expect(isIpAllowed('203.0.113.7', list)).toBe(true);
+    expect(isIpAllowed('::ffff:198.51.100.42', list)).toBe(true);
+    expect(isIpAllowed('203.0.113.8', list)).toBe(false);
+    expect(isIpAllowed(undefined, list)).toBe(false);
+  });
+});

ApiCore-Backend/src/api-keys/ip-allowlist.ts

@@ -0,0 +1,66 @@
+import * as net from 'node:net';
+
+/** Max entries per key - an allowlist is a short list of servers. */
+export const MAX_ALLOWED_IPS = 20;
+
+function unmapIpv4(ip: string): string {
+  const mapped = /^::ffff:(\d+\.\d+\.\d+\.\d+)$/i.exec(ip);
+  return mapped ? mapped[1] : ip;
+}
+
+/**
+ * "203.0.113.7", "203.0.113.0/24", "2001:db8::/32" in canonical form, or
+ * null if the entry is neither an address nor a network.
+ */
+export function normalizeAllowlistEntry(entry: string): string | null {
+  const trimmed = entry.trim();
+  const [address, prefix, ...rest] = trimmed.split('/');
+  if (rest.length > 0 || !address) {
+    return null;
+  }
+  const ip = unmapIpv4(address);
+  const version = net.isIP(ip);
+  if (version === 0) {
+    return null;
+  }
+  if (prefix === undefined) {
+    return ip;
+  }
+  if (!/^\d{1,3}$/.test(prefix)) {
+    return null;
+  }
+  const bits = Number(prefix);
+  if (bits > (version === 4 ? 32 : 128)) {
+    return null;
+  }
+  return `${ip}/${bits}`;
+}
+
+/** An empty list allows every address. */
+export function isIpAllowed(
+  clientIp: string | undefined,
+  allowedIps: readonly string[],
+): boolean {
+  if (allowedIps.length === 0) {
+    return true;
+  }
+  if (!clientIp) {
+    return false;
+  }
+  const ip = unmapIpv4(clientIp);
+  const version = net.isIP(ip);
+  if (version === 0) {
+    return false;
+  }
+  const list = new net.BlockList();
+  for (const entry of allowedIps) {
+    const [address, prefix] = entry.split('/');
+    const family = net.isIP(address) === 6 ? 'ipv6' : 'ipv4';
+    if (prefix === undefined) {
+      list.addAddress(address, family);
+    } else {
+      list.addSubnet(address, Number(prefix), family);
+    }
+  }
+  return list.check(ip, version === 6 ? 'ipv6' : 'ipv4');
+}

ApiCore-Backend/src/app.config.ts

@@ -4,18 +4,58 @@ import helmet from 'helmet';
 import cookieParser from 'cookie-parser';
 import { AllExceptionsFilter } from './common/filters/all-exceptions.filter';
 import { requestLoggerMiddleware } from './common/middleware/request-logger.middleware';
+import { noStoreMiddleware } from './common/middleware/no-store.middleware';
+
+/**
+ * How many reverse-proxy hops to trust for X-Forwarded-For. It decides the
+ * client IP behind every rate limit and API-key IP allowlist: too few and
+ * all users share the proxy's IP, too many and a client can forge its own.
+ * A hop count ("1", the single K8s ingress) or Express' list syntax
+ * ("loopback, 10.0.0.0/8").
+ */
+export function trustProxySetting(): number | string {
+  const raw = process.env.TRUST_PROXY?.trim();
+  if (!raw) {
+    return 1;
+  }
+  return /^\d+$/.test(raw) ? Number(raw) : raw;
+}
 
 export function configureApp(app: NestExpressApplication): void {
   // Trust the single reverse-proxy hop (K8s ingress) so req.ip reflects the
   // real client IP from X-Forwarded-For — required for per-client throttling
   // to work correctly rather than rate-limiting all traffic together.
-  app.set('trust proxy', 1);
+  app.set('trust proxy', trustProxySetting());
+  // No ETags: they let caches and proxies revalidate (and keep) personal
+  // responses that are meant to be no-store.
+  app.set('etag', false);
   // Default 100kb JSON body limit is too small for the avatar upload, which
   // sends the image as a base64 data: URL in the JSON body (not multipart -
   // see profile/dto/upload-avatar.dto.ts for why) - 5mb comfortably covers
   // the 2MB decoded size cap plus base64 overhead.
   app.useBodyParser('json', { limit: '5mb' });
-  app.use(helmet());
+  app.use(
+    helmet({
+      // This server only answers JSON and files. A strict policy means even
+      // a response that is somehow rendered as a page can load nothing and
+      // cannot be framed. The Swagger UI (opt-in) needs scripts, so it keeps
+      // helmet's default page policy.
+      contentSecurityPolicy:
+        process.env.ENABLE_SWAGGER === 'true'
+          ? undefined
+          : {
+              useDefaults: false,
+              directives: {
+                defaultSrc: ["'none'"],
+                frameAncestors: ["'none'"],
+                baseUri: ["'none'"],
+                formAction: ["'none'"],
+              },
+            },
+      crossOriginResourcePolicy: { policy: 'same-site' },
+    }),
+  );
+  app.use(noStoreMiddleware);
   app.use(cookieParser());
   app.use(requestLoggerMiddleware);
   app.useGlobalFilters(new AllExceptionsFilter());

ApiCore-Backend/src/app.module.ts

@@ -1,6 +1,6 @@
 import { Module } from '@nestjs/common';
 import { ConfigModule } from '@nestjs/config';
-import { APP_GUARD } from '@nestjs/core';
+import { APP_GUARD, APP_INTERCEPTOR } from '@nestjs/core';
 import { ThrottlerGuard, ThrottlerModule } from '@nestjs/throttler';
 import { ScheduleModule } from '@nestjs/schedule';
 import { PrismaModule } from './prisma/prisma.module';
@@ -40,13 +40,18 @@ import { ImportModule } from './import/import.module';
 import { PublicModule } from './public/public.module';
 import { TaskTemplatesModule } from './task-templates/task-templates.module';
 import { SwarmControlModule } from './swarm-control/swarm-control.module';
+import { WinterChecksModule } from './winter-checks/winter-checks.module';
 import { WeatherModule } from './weather/weather.module';
 import { ProfileModule } from './profile/profile.module';
 import { SiteSettingsModule } from './site-settings/site-settings.module';
 import { BackupModule } from './backup/backup.module';
+import { ShopSyncModule } from './shop-sync/shop-sync.module';
+import { ApiKeysModule } from './api-keys/api-keys.module';
 import { JwtAuthGuard } from './auth/guards/jwt-auth.guard';
 import { PermissionsGuard } from './auth/guards/permissions.guard';
 import { PermissionsModule } from './auth/permissions/permissions.module';
+import { IdempotencyInterceptor } from './common/idempotency/idempotency.interceptor';
+import { IdempotencyCleanupService } from './common/idempotency/idempotency-cleanup.service';
 
 @Module({
   imports: [
@@ -91,16 +96,23 @@ import { PermissionsModule } from './auth/permissions/permissions.module';
     PublicModule,
     TaskTemplatesModule,
     SwarmControlModule,
+    WinterChecksModule,
     WeatherModule,
     ProfileModule,
     SiteSettingsModule,
     BackupModule,
+    ShopSyncModule,
+    ApiKeysModule,
   ],
   controllers: [],
   providers: [
+    // Throttle first: a request with a wrong token or API key must count
+    // against the limit too, before any database lookup is spent on it.
+    { provide: APP_GUARD, useClass: ThrottlerGuard },
     { provide: APP_GUARD, useClass: JwtAuthGuard },
     { provide: APP_GUARD, useClass: PermissionsGuard },
-    { provide: APP_GUARD, useClass: ThrottlerGuard },
+    { provide: APP_INTERCEPTOR, useClass: IdempotencyInterceptor },
+    IdempotencyCleanupService,
   ],
 })
 export class AppModule {}

ApiCore-Backend/src/auth/auth.controller.ts

@@ -82,6 +82,7 @@ export class AuthController {
   }
 
   @Public()
+  @Throttle(SENSITIVE_ACTION_THROTTLE)
   @Post('logout')
   @HttpCode(HttpStatus.NO_CONTENT)
   async logout(

ApiCore-Backend/src/auth/auth.module.ts

@@ -5,6 +5,7 @@ import { UsersModule } from '../users/users.module';
 import { AuthController } from './auth.controller';
 import { AuthService } from './auth.service';
 import { JwtStrategy } from './strategies/jwt.strategy';
+import { OneTimeTokenService } from './one-time-token.service';
 import { MfaModule } from './mfa/mfa.module';
 import { SsoModule } from './sso/sso.module';
 import { SsoController } from './sso/sso.controller';
@@ -18,6 +19,6 @@ import { SsoController } from './sso/sso.controller';
     SsoModule,
   ],
   controllers: [AuthController, SsoController],
-  providers: [AuthService, JwtStrategy],
+  providers: [AuthService, JwtStrategy, OneTimeTokenService],
 })
 export class AuthModule {}

ApiCore-Backend/src/auth/auth.service.spec.ts

@@ -5,6 +5,8 @@ import { PrismaService } from '../prisma/prisma.service';
 import { UsersService } from '../users/users.service';
 import { AuditLogService } from '../audit/audit-log.service';
 import { MfaService } from './mfa/mfa.service';
+import { AccountGuardService } from './mfa/account-guard.service';
+import { OneTimeTokenService } from './one-time-token.service';
 
 describe('AuthService', () => {
   let authService: AuthService;
@@ -26,7 +28,13 @@ describe('AuthService', () => {
   let mfaService: {
     signChallengeToken: jest.Mock;
     verifyChallengeToken: jest.Mock;
-    verifyCode: jest.Mock;
+  };
+  let oneTimeTokens: { consume: jest.Mock };
+  let accountGuard: {
+    isLocked: jest.Mock;
+    recordFailure: jest.Mock;
+    recordSuccess: jest.Mock;
+    consumeTotp: jest.Mock;
   };
 
   const activeUser = {
@@ -60,7 +68,13 @@ describe('AuthService', () => {
     mfaService = {
       signChallengeToken: jest.fn().mockReturnValue('mfa-challenge-token'),
       verifyChallengeToken: jest.fn(),
-      verifyCode: jest.fn(),
+    };
+    oneTimeTokens = { consume: jest.fn().mockResolvedValue(undefined) };
+    accountGuard = {
+      isLocked: jest.fn().mockReturnValue(false),
+      recordFailure: jest.fn().mockResolvedValue(undefined),
+      recordSuccess: jest.fn().mockResolvedValue(undefined),
+      consumeTotp: jest.fn(),
     };
 
     authService = new AuthService(
@@ -70,6 +84,8 @@ describe('AuthService', () => {
       auditLog as unknown as AuditLogService,
       permissionResolver as never,
       mfaService as unknown as MfaService,
+      accountGuard as unknown as AccountGuardService,
+      oneTimeTokens as unknown as OneTimeTokenService,
     );
   });
 
@@ -157,21 +173,40 @@ describe('AuthService', () => {
       );
     });
 
-    it('records a LOGIN_FAILED audit entry keyed by email when the user is unknown', async () => {
+    it('writes nothing attacker-chosen to the audit log for an unknown email', async () => {
       usersService.findByEmail.mockResolvedValue(null);
       await expect(
         authService.login('[email protected]', 'x'),
       ).rejects.toBeInstanceOf(UnauthorizedException);
-      expect(auditLog.record).toHaveBeenCalledWith(
-        expect.objectContaining({
-          action: 'LOGIN_FAILED',
-          entityId: '[email protected]',
-        }),
-      );
-      const [[recordArg]] = auditLog.record.mock.calls as [
-        [{ userId?: string }],
-      ];
-      expect(recordArg).not.toHaveProperty('userId');
+      expect(auditLog.record).not.toHaveBeenCalled();
+    });
+
+    it('counts a wrong password against the account', async () => {
+      usersService.findByEmail.mockResolvedValue(activeUser);
+      await expect(
+        authService.login(activeUser.email, 'wrong-password'),
+      ).rejects.toBeInstanceOf(UnauthorizedException);
+      expect(accountGuard.recordFailure).toHaveBeenCalledWith(activeUser.id);
+    });
+
+    it('refuses a locked account even with the right password, with the same message', async () => {
+      usersService.findByEmail.mockResolvedValue(activeUser);
+      accountGuard.isLocked.mockReturnValue(true);
+
+      const lockedMessage = await authService
+        .login(activeUser.email, 'correct-password')
+        .then(() => 'no error')
+        .catch((error: Error) => error.message);
+
+      accountGuard.isLocked.mockReturnValue(false);
+      const wrongMessage = await authService
+        .login(activeUser.email, 'wrong-password')
+        .then(() => 'no error')
+        .catch((error: Error) => error.message);
+
+      expect(lockedMessage).not.toBe('no error');
+      expect(lockedMessage).toBe(wrongMessage);
+      expect(prisma.refreshToken.create).not.toHaveBeenCalled();
     });
   });
 
@@ -183,9 +218,12 @@ describe('AuthService', () => {
     };
 
     it('issues tokens and records LOGIN when the code is valid', async () => {
-      mfaService.verifyChallengeToken.mockReturnValue({ userId: mfaUser.id });
+      mfaService.verifyChallengeToken.mockReturnValue({
+        userId: mfaUser.id,
+        claims: { jti: 'jti-1', exp: 1_900_000_000 },
+      });
       usersService.findById.mockResolvedValue(mfaUser);
-      mfaService.verifyCode.mockResolvedValue(true);
+      accountGuard.consumeTotp.mockResolvedValue(true);
       prisma.refreshToken.create.mockResolvedValue({});
 
       const result = await authService.verifyMfaAndLogin(
@@ -194,20 +232,20 @@ describe('AuthService', () => {
       );
 
       expect(result.accessToken).toBe('signed.jwt.token');
-      expect(mfaService.verifyCode).toHaveBeenCalledWith(
-        mfaUser.mfaSecret,
-        mfaUser.email,
-        '123456',
-      );
+      expect(accountGuard.consumeTotp).toHaveBeenCalledWith(mfaUser, '123456');
+      expect(accountGuard.recordSuccess).toHaveBeenCalledWith(mfaUser.id);
       expect(auditLog.record).toHaveBeenCalledWith(
         expect.objectContaining({ action: 'LOGIN', userId: mfaUser.id }),
       );
     });
 
     it('throws and records LOGIN_FAILED when the code is invalid', async () => {
-      mfaService.verifyChallengeToken.mockReturnValue({ userId: mfaUser.id });
+      mfaService.verifyChallengeToken.mockReturnValue({
+        userId: mfaUser.id,
+        claims: { jti: 'jti-1', exp: 1_900_000_000 },
+      });
       usersService.findById.mockResolvedValue(mfaUser);
-      mfaService.verifyCode.mockResolvedValue(false);
+      accountGuard.consumeTotp.mockResolvedValue(false);
 
       await expect(
         authService.verifyMfaAndLogin('mfa-challenge-token', '000000'),
@@ -295,7 +333,8 @@ describe('AuthService', () => {
       prisma.refreshToken.findUnique.mockResolvedValue({
         id: 'rt-1',
         userId: activeUser.id,
-        revokedAt: new Date(),
+        // Rotated out a minute ago - well past the parallel-tab window.
+        revokedAt: new Date(Date.now() - 60_000),
         expiresAt: new Date(Date.now() + 1000),
       });
       prisma.refreshToken.updateMany.mockResolvedValue({ count: 2 });
@@ -325,22 +364,78 @@ describe('AuthService', () => {
       );
     });
 
+    it('does not revoke everything when a parallel tab just rotated the token', async () => {
+      prisma.refreshToken.findUnique.mockResolvedValue({
+        id: 'rt-1',
+        userId: activeUser.id,
+        revokedAt: new Date(Date.now() - 1000),
+        expiresAt: new Date(Date.now() + 1000),
+      });
+
+      await expect(authService.refresh('just-rotated')).rejects.toBeInstanceOf(
+        UnauthorizedException,
+      );
+      expect(prisma.refreshToken.updateMany).not.toHaveBeenCalled();
+    });
+
+    it('gives only one of two concurrent refreshes a successor', async () => {
+      prisma.refreshToken.findUnique.mockResolvedValue({
+        id: 'rt-1',
+        userId: activeUser.id,
+        revokedAt: null,
+        expiresAt: new Date(Date.now() + 1000),
+        sessionStartedAt: new Date(),
+      });
+      usersService.findById.mockResolvedValue(activeUser);
+      prisma.refreshToken.updateMany.mockResolvedValue({ count: 0 });
+
+      await expect(authService.refresh('raced-token')).rejects.toBeInstanceOf(
+        UnauthorizedException,
+      );
+      expect(prisma.refreshToken.create).not.toHaveBeenCalled();
+    });
+
+    it('never extends a session past seven days from login', async () => {
+      const startedSixDaysAgo = new Date(Date.now() - 6 * 24 * 3600 * 1000);
+      prisma.refreshToken.findUnique.mockResolvedValue({
+        id: 'rt-1',
+        userId: activeUser.id,
+        revokedAt: null,
+        expiresAt: new Date(Date.now() + 1000),
+        sessionStartedAt: startedSixDaysAgo,
+      });
+      usersService.findById.mockResolvedValue(activeUser);
+      prisma.refreshToken.updateMany.mockResolvedValue({ count: 1 });
+      prisma.refreshToken.create.mockResolvedValue({});
+
+      await authService.refresh('valid-token');
+
+      const [[createArg]] = prisma.refreshToken.create.mock.calls as [
+        [{ data: { expiresAt: Date; sessionStartedAt: Date } }],
+      ];
+      expect(createArg.data.sessionStartedAt).toEqual(startedSixDaysAgo);
+      expect(createArg.data.expiresAt.getTime()).toBe(
+        startedSixDaysAgo.getTime() + 7 * 24 * 3600 * 1000,
+      );
+    });
+
     it('rotates the refresh token on success', async () => {
       prisma.refreshToken.findUnique.mockResolvedValue({
         id: 'rt-1',
         userId: activeUser.id,
         revokedAt: null,
         expiresAt: new Date(Date.now() + 1000),
+        sessionStartedAt: new Date(),
       });
       usersService.findById.mockResolvedValue(activeUser);
-      prisma.refreshToken.update.mockResolvedValue({});
+      prisma.refreshToken.updateMany.mockResolvedValue({ count: 1 });
       prisma.refreshToken.create.mockResolvedValue({});
 
       const result = await authService.refresh('valid-token');
 
       expect(result.accessToken).toBe('signed.jwt.token');
-      expect(prisma.refreshToken.update).toHaveBeenCalledWith(
-        expect.objectContaining({ where: { id: 'rt-1' } }),
+      expect(prisma.refreshToken.updateMany).toHaveBeenCalledWith(
+        expect.objectContaining({ where: { id: 'rt-1', revokedAt: null } }),
       );
       expect(auditLog.record).toHaveBeenCalledWith(
         expect.objectContaining({

ApiCore-Backend/src/auth/auth.service.ts

@@ -7,7 +7,10 @@ import { UsersService } from '../users/users.service';
 import { AuditLogService } from '../audit/audit-log.service';
 import { PermissionResolverService } from './permissions/permission-resolver.service';
 import { MfaService } from './mfa/mfa.service';
+import { AccountGuardService } from './mfa/account-guard.service';
+import { OneTimeTokenService } from './one-time-token.service';
 import { parseDurationToMs } from './util/duration';
+import { TOKEN_AUDIENCE, jwtSignOptions } from './util/jwt-claims';
 
 interface AuthTokens {
   accessToken: string;
@@ -31,6 +34,25 @@ export interface CurrentUserProfile {
 
 const REFRESH_TOKEN_BYTES = 40;
 
+// Hard cap from the moment of login, however often the session is refreshed.
+const DEFAULT_SESSION_MAX_AGE = '7d';
+// Two tabs refreshing with the same token at the same moment is normal;
+// only a reuse after this window is treated as theft.
+const ROTATION_GRACE_MS = 10_000;
+
+// Same answer for unknown email, wrong password, deactivated or locked
+// account - nothing in the response tells which one it was.
+const INVALID_CREDENTIALS =
+  'E-Mail oder Passwort falsch. Nach mehreren Fehlversuchen ist die Anmeldung für 15 Minuten gesperrt.';
+
+// Hash of a random value nobody knows, at the same cost as real password
+// hashes; compared against when there is no real hash, so every login
+// costs the same time.
+const DUMMY_PASSWORD_HASH = bcrypt.hashSync(
+  crypto.randomBytes(32).toString('hex'),
+  12,
+);
+
 @Injectable()
 export class AuthService {
   private readonly logger = new Logger(AuthService.name);
@@ -42,6 +64,8 @@ export class AuthService {
     private readonly auditLog: AuditLogService,
     private readonly permissionResolver: PermissionResolverService,
     private readonly mfaService: MfaService,
+    private readonly accountGuard: AccountGuardService,
+    private readonly oneTimeTokens: OneTimeTokenService,
   ) {}
 
   async getCurrentUserProfile(userId: string): Promise<CurrentUserProfile> {
@@ -72,56 +96,64 @@ export class AuthService {
     );
     return this.jwtService.sign(
       { sub: user.id, email: user.email },
-      {
-        secret: process.env.JWT_ACCESS_SECRET,
-        expiresIn: expiresInSeconds,
-      },
+      jwtSignOptions(TOKEN_AUDIENCE.access, expiresInSeconds),
     );
   }
 
-  private async issueRefreshToken(userId: string): Promise<string> {
+  private async issueRefreshToken(
+    userId: string,
+    sessionStartedAt: Date = new Date(),
+  ): Promise<string> {
     const token = crypto.randomBytes(REFRESH_TOKEN_BYTES).toString('hex');
-    const expiresAt = new Date(
+    const slidingExpiry =
       Date.now() +
-        parseDurationToMs(process.env.JWT_REFRESH_EXPIRES_IN ?? '7d'),
-    );
+      parseDurationToMs(process.env.JWT_REFRESH_EXPIRES_IN ?? '7d');
+    const absoluteExpiry =
+      sessionStartedAt.getTime() +
+      parseDurationToMs(process.env.SESSION_MAX_AGE ?? DEFAULT_SESSION_MAX_AGE);
     await this.prisma.refreshToken.create({
-      data: { userId, tokenHash: this.hashRefreshToken(token), expiresAt },
+      data: {
+        userId,
+        tokenHash: this.hashRefreshToken(token),
+        expiresAt: new Date(Math.min(slidingExpiry, absoluteExpiry)),
+        sessionStartedAt,
+      },
     });
     return token;
   }
 
   async login(email: string, password: string): Promise<LoginResult> {
     const user = await this.usersService.findByEmail(email);
+    // bcrypt runs on every path - unknown, deactivated, locked or real - so
+    // the response time does not reveal which accounts exist.
+    const passwordMatches = await bcrypt.compare(
+      password,
+      user?.passwordHash ?? DUMMY_PASSWORD_HASH,
+    );
     if (!user) {
-      this.logger.warn(`Login failed: no user with email ${email}`);
-      await this.auditLog.record({
-        entityType: 'AuthSession',
-        entityId: email,
-        action: 'LOGIN_FAILED',
-      });
-      throw new UnauthorizedException('Invalid credentials');
+      this.logger.warn('Login failed: unknown email');
+      throw new UnauthorizedException(INVALID_CREDENTIALS);
     }
-    if (!user.isActive) {
-      this.logger.warn(`Login failed: user ${user.id} is deactivated`);
+    if (!user.isActive || this.accountGuard.isLocked(user)) {
+      this.logger.warn(`Login refused: user ${user.id} inactive or locked`);
       await this.auditLog.record({
         entityType: 'AuthSession',
         entityId: user.id,
         action: 'LOGIN_FAILED',
         userId: user.id,
       });
-      throw new UnauthorizedException('Invalid credentials');
+      throw new UnauthorizedException(INVALID_CREDENTIALS);
     }
-    const passwordMatches = await bcrypt.compare(password, user.passwordHash);
     if (!passwordMatches) {
       this.logger.warn(`Login failed: wrong password for user ${user.id}`);
+      await this.accountGuard.recordFailure(user.id);
       await this.auditLog.record({
         entityType: 'AuthSession',
         entityId: user.id,
         action: 'LOGIN_FAILED',
         userId: user.id,
       });
-      throw new UnauthorizedException('Invalid credentials');
+      throw new UnauthorizedException(INVALID_CREDENTIALS);
     }
     if (user.mfaEnabled) {
       return {
@@ -135,6 +167,7 @@ export class AuthService {
     };
     const accessToken = this.signAccessToken(authenticatedUser);
     const refreshToken = await this.issueRefreshToken(user.id);
+    await this.accountGuard.recordSuccess(user.id);
     await this.auditLog.record({
       entityType: 'AuthSession',
       entityId: user.id,
@@ -177,20 +210,20 @@ export class AuthService {
   }
 
   async verifyMfaAndLogin(mfaToken: string, code: string): Promise<AuthTokens> {
-    const { userId } = this.mfaService.verifyChallengeToken(mfaToken);
+    const { userId, claims } = this.mfaService.verifyChallengeToken(mfaToken);
     const user = await this.usersService.findById(userId);
     if (!user.isActive || !user.mfaEnabled || !user.mfaSecret) {
       throw new UnauthorizedException('MFA nicht verfügbar');
     }
-    const isValid = await this.mfaService.verifyCode(
-      user.mfaSecret,
-      user.email,
-      code,
-    );
+    if (this.accountGuard.isLocked(user)) {
+      throw new UnauthorizedException(INVALID_CREDENTIALS);
+    }
+    const isValid = await this.accountGuard.consumeTotp(user, code);
     if (!isValid) {
       this.logger.warn(
-        `MFA verification failed: wrong code for user ${user.id}`,
+        `MFA verification failed: wrong or reused code for user ${user.id}`,
       );
+      await this.accountGuard.recordFailure(user.id);
       await this.auditLog.record({
         entityType: 'AuthSession',
         entityId: user.id,
@@ -199,6 +232,9 @@ export class AuthService {
       });
       throw new UnauthorizedException('Code ungültig');
     }
+    // A challenge that already opened a session cannot open another one.
+    await this.oneTimeTokens.consume(claims);
+    await this.accountGuard.recordSuccess(user.id);
     const authenticatedUser = {
       id: user.id,
       email: user.email,
@@ -222,6 +258,14 @@ export class AuthService {
     if (!stored) {
       throw new UnauthorizedException('Invalid refresh token');
     }
+    if (
+      stored.revokedAt &&
+      Date.now() - stored.revokedAt.getTime() < ROTATION_GRACE_MS
+    ) {
+      // Lost a race with a parallel refresh (second tab): no new session,
+      // but no alarm either - that tab simply uses the other's cookie.
+      throw new UnauthorizedException('Invalid refresh token');
+    }
     if (stored.revokedAt) {
       // Reuse of an already-rotated-out refresh token is a strong signal
       // it was stolen (a legitimate client only ever presents the newest
@@ -244,16 +288,25 @@ export class AuthService {
     if (!user.isActive) {
       throw new UnauthorizedException('Invalid refresh token');
     }
-    await this.prisma.refreshToken.update({
-      where: { id: stored.id },
+    // Atomic: of two requests presenting the same token, exactly one wins
+    // and gets a successor - one stolen token can never fork into two live
+    // sessions.
+    const claimed = await this.prisma.refreshToken.updateMany({
+      where: { id: stored.id, revokedAt: null },
       data: { revokedAt: new Date() },
     });
+    if (claimed.count !== 1) {
+      throw new UnauthorizedException('Invalid refresh token');
+    }
     const authenticatedUser = {
       id: user.id,
       email: user.email,
     };
     const accessToken = this.signAccessToken(authenticatedUser);
-    const newRefreshToken = await this.issueRefreshToken(user.id);
+    const newRefreshToken = await this.issueRefreshToken(
+      user.id,
+      stored.sessionStartedAt,
+    );
     await this.auditLog.record({
       entityType: 'AuthSession',
       entityId: user.id,

ApiCore-Backend/src/auth/dto/login.dto.ts

@@ -1,13 +1,18 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsEmail, IsString, MinLength } from 'class-validator';
+import { IsEmail, IsString, MaxLength, MinLength } from 'class-validator';
+import { NormalizeEmail } from '../../common/validation/normalize-email';
 
 export class LoginDto {
   @ApiProperty()
+  @NormalizeEmail()
   @IsEmail()
   email!: string;
 
   @ApiProperty()
   @IsString()
   @MinLength(8)
+  // Long enough for any real password; bounds the bcrypt work an
+  // anonymous request can cause.
+  @MaxLength(256)
   password!: string;
 }

ApiCore-Backend/src/auth/guards/jwt-auth.guard.spec.ts

@@ -2,16 +2,19 @@ import { ExecutionContext, UnauthorizedException } from '@nestjs/common';
 import { Reflector } from '@nestjs/core';
 import { JwtAuthGuard } from './jwt-auth.guard';
 import { PermissionResolverService } from '../permissions/permission-resolver.service';
+import { ApiKeysService } from '../../api-keys/api-keys.service';
 
 describe('JwtAuthGuard', () => {
   let guard: JwtAuthGuard;
   let reflector: { getAllAndOverride: jest.Mock };
   let permissionResolver: { isTokenValid: jest.Mock };
+  let apiKeys: { authenticate: jest.Mock };
 
   function contextWithUser(
     user: { id: string; tokenIssuedAt?: number } | undefined,
+    authorization?: string,
   ): ExecutionContext {
-    const request = { user };
+    const request = { user, headers: { authorization } };
     return {
       getHandler: () => ({}),
       getClass: () => ({}),
@@ -22,9 +25,11 @@ describe('JwtAuthGuard', () => {
   beforeEach(() => {
     reflector = { getAllAndOverride: jest.fn().mockReturnValue(false) };
     permissionResolver = { isTokenValid: jest.fn() };
+    apiKeys = { authenticate: jest.fn() };
     guard = new JwtAuthGuard(
       reflector as unknown as Reflector,
       permissionResolver as unknown as PermissionResolverService,
+      apiKeys as unknown as ApiKeysService,
     );
   });
 
@@ -72,4 +77,27 @@ describe('JwtAuthGuard', () => {
       UnauthorizedException,
     );
   });
+
+  it('authenticates an API key as a machine principal, not as a user', async () => {
+    const principal = { id: 'key-1', scopes: ['shop-sync:read'] };
+    apiKeys.authenticate.mockResolvedValue(principal);
+    const context = contextWithUser(undefined, 'Bearer ack_abcdefgh_secret');
+
+    await expect(guard.canActivate(context)).resolves.toBe(true);
+    const request = context.switchToHttp().getRequest<{
+      apiKey?: unknown;
+      user?: unknown;
+    }>();
+    expect(request.apiKey).toBe(principal);
+    expect(request.user).toBeUndefined();
+    expect(permissionResolver.isTokenValid).not.toHaveBeenCalled();
+  });
+
+  it('rejects an unknown, revoked or expired API key', async () => {
+    apiKeys.authenticate.mockResolvedValue(null);
+
+    await expect(
+      guard.canActivate(contextWithUser(undefined, 'Bearer ack_abcdefgh_x')),
+    ).rejects.toBeInstanceOf(UnauthorizedException);
+  });
 });

ApiCore-Backend/src/auth/guards/jwt-auth.guard.ts

@@ -8,9 +8,17 @@ import { AuthGuard } from '@nestjs/passport';
 import { IS_PUBLIC_KEY } from '../decorators/public.decorator';
 import { PermissionResolverService } from '../permissions/permission-resolver.service';
 import { AuthenticatedUser } from '../types/authenticated-user';
+import {
+  ApiKeyPrincipal,
+  ApiKeysService,
+  extractApiKeyToken,
+} from '../../api-keys/api-keys.service';
 
 interface RequestWithUser {
+  headers: { authorization?: string };
+  ip?: string;
   user?: AuthenticatedUser;
+  apiKey?: ApiKeyPrincipal;
 }
 
 /**
@@ -28,6 +36,7 @@ export class JwtAuthGuard extends AuthGuard('jwt') {
   constructor(
     private readonly reflector: Reflector,
     private readonly permissionResolver: PermissionResolverService,
+    private readonly apiKeys: ApiKeysService,
   ) {
     super();
   }
@@ -40,11 +49,29 @@ export class JwtAuthGuard extends AuthGuard('jwt') {
     if (isPublic) {
       return true;
     }
+    const request = context.switchToHttp().getRequest<RequestWithUser>();
+
+    // An API key ("Bearer ack_…") authenticates a machine, not a user: no
+    // request.user is set, so it can never pass a user-only route, and
+    // PermissionsGuard checks its scopes instead of a role.
+    const apiKeyToken = extractApiKeyToken(request.headers.authorization);
+    if (apiKeyToken !== null) {
+      // request.ip honours TRUST_PROXY (see app.config.ts).
+      const principal = await this.apiKeys.authenticate(
+        apiKeyToken,
+        request.ip,
+      );
+      if (!principal) {
+        throw new UnauthorizedException();
+      }
+      request.apiKey = principal;
+      return true;
+    }
+
     const authenticated = (await super.canActivate(context)) as boolean;
     if (!authenticated) {
       return false;
     }
-    const request = context.switchToHttp().getRequest<RequestWithUser>();
     const user = request.user;
     if (
       !user ||

ApiCore-Backend/src/auth/guards/permissions.guard.ts

@@ -6,9 +6,11 @@ import { REQUIRE_PERMISSION_KEY } from '../decorators/require-permission.decorat
 import { PermissionKey } from '../permissions/permission-catalog';
 import { PermissionResolverService } from '../permissions/permission-resolver.service';
 import { AuthenticatedUser } from '../types/authenticated-user';
+import type { ApiKeyPrincipal } from '../../api-keys/api-keys.service';
 
 interface RequestWithUser {
   user?: AuthenticatedUser;
+  apiKey?: ApiKeyPrincipal;
 }
 
 /**
@@ -47,6 +49,15 @@ export class PermissionsGuard implements CanActivate {
     const request = context.switchToHttp().getRequest<RequestWithUser>();
     const user = request.user;
 
+    // API keys pass only routes that name a permission the key carries -
+    // never @AnyAuthenticatedUser routes, which are meant for people.
+    if (request.apiKey) {
+      const scopes: readonly string[] = request.apiKey.scopes;
+      return Boolean(
+        requiredPermissions?.some((permission) => scopes.includes(permission)),
+      );
+    }
+
     if (requiredPermissions && requiredPermissions.length > 0) {
       if (!user) {
         return false;

ApiCore-Backend/src/auth/mfa/account-guard.service.ts

@@ -0,0 +1,97 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { PrismaService } from '../../prisma/prisma.service';
+import { AuditLogService } from '../../audit/audit-log.service';
+import { MfaService } from './mfa.service';
+
+/** After this many failed attempts in a row the account is locked ... */
+export const MAX_FAILED_AUTH_ATTEMPTS = 5;
+/** ... for this long. */
+export const AUTH_LOCK_MS = 15 * 60 * 1000;
+
+export interface GuardedUser {
+  id: string;
+  email: string;
+  mfaSecret: string | null;
+  mfaLastTimeStep: number | null;
+  authLockedUntil: Date | null;
+}
+
+/**
+ * Account-level brute-force protection, on top of the per-IP throttle:
+ * an attacker spreading guesses over many addresses still only gets five
+ * tries per account per 15 minutes - for the password, the MFA code and
+ * step-up confirmations alike. A TOTP code is accepted once: its time step
+ * is recorded, and that step or any earlier one is refused afterwards.
+ */
+@Injectable()
+export class AccountGuardService {
+  private readonly logger = new Logger(AccountGuardService.name);
+
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly mfaService: MfaService,
+    private readonly auditLog: AuditLogService,
+  ) {}
+
+  isLocked(user: Pick<GuardedUser, 'authLockedUntil'>): boolean {
+    return Boolean(user.authLockedUntil && user.authLockedUntil > new Date());
+  }
+
+  async recordFailure(userId: string): Promise<void> {
+    const updated = await this.prisma.user.update({
+      where: { id: userId },
+      data: { failedAuthAttempts: { increment: 1 } },
+      select: { failedAuthAttempts: true },
+    });
+    if (updated.failedAuthAttempts >= MAX_FAILED_AUTH_ATTEMPTS) {
+      await this.prisma.user.update({
+        where: { id: userId },
+        data: {
+          authLockedUntil: new Date(Date.now() + AUTH_LOCK_MS),
+          failedAuthAttempts: 0,
+        },
+      });
+      this.logger.warn(`Account ${userId} locked after repeated failures`);
+      await this.auditLog.record({
+        entityType: 'AuthSession',
+        entityId: userId,
+        action: 'ACCOUNT_LOCKED',
+        userId,
+      });
+    }
+  }
+
+  async recordSuccess(userId: string): Promise<void> {
+    await this.prisma.user.update({
+      where: { id: userId },
+      data: { failedAuthAttempts: 0, authLockedUntil: null },
+    });
+  }
+
+  /**
+   * True only for a valid code whose time step is newer than the last one
+   * used - and only for one of two concurrent requests with the same code.
+   */
+  async consumeTotp(user: GuardedUser, code: string): Promise<boolean> {
+    if (!user.mfaSecret) {
+      return false;
+    }
+    const timeStep = await this.mfaService.verifyCodeStep(
+      user.mfaSecret,
+      user.email,
+      code,
+      user.mfaLastTimeStep ?? undefined,
+    );
+    if (timeStep === null) {
+      return false;
+    }
+    const claimed = await this.prisma.user.updateMany({
+      where: {
+        id: user.id,
+        OR: [{ mfaLastTimeStep: null }, { mfaLastTimeStep: { lt: timeStep } }],
+      },
+      data: { mfaLastTimeStep: timeStep },
+    });
+    return claimed.count === 1;
+  }
+}

ApiCore-Backend/src/auth/mfa/mfa.module.ts

@@ -1,10 +1,11 @@
 import { Module } from '@nestjs/common';
 import { JwtModule } from '@nestjs/jwt';
 import { MfaService } from './mfa.service';
+import { AccountGuardService } from './account-guard.service';
 
 @Module({
   imports: [JwtModule.register({})],
-  providers: [MfaService],
-  exports: [MfaService],
+  providers: [MfaService, AccountGuardService],
+  exports: [MfaService, AccountGuardService],
 })
 export class MfaModule {}

ApiCore-Backend/src/auth/mfa/mfa.service.spec.ts

@@ -139,10 +139,13 @@ describe('MfaService', () => {
       jwtService.verify.mockReturnValue({
         sub: 'user-1',
         purpose: 'mfa-challenge',
+        jti: 'jti-1',
+        exp: 1_900_000_000,
       });
 
       expect(mfaService.verifyChallengeToken('token')).toEqual({
         userId: 'user-1',
+        claims: { jti: 'jti-1', exp: 1_900_000_000 },
       });
     });
 

ApiCore-Backend/src/auth/mfa/mfa.service.ts

@@ -2,7 +2,18 @@ import { Injectable, UnauthorizedException } from '@nestjs/common';
 import { JwtService } from '@nestjs/jwt';
 import * as QRCode from 'qrcode';
 import { decryptMfaSecret, encryptMfaSecret } from './mfa-crypto.util';
-import { buildTotpUri, generateTotpSecret, verifyTotpCode } from './totp.util';
+import {
+  buildTotpUri,
+  generateTotpSecret,
+  verifyTotpCode,
+  verifyTotpStep,
+} from './totp.util';
+import {
+  OneTimeTokenClaims,
+  TOKEN_AUDIENCE,
+  jwtSignOptions,
+  jwtVerifyOptions,
+} from '../util/jwt-claims';
 
 const SETUP_TOKEN_TTL = '10m';
 const CHALLENGE_TOKEN_TTL = '5m';
@@ -41,7 +52,7 @@ export class MfaService {
     });
     const setupToken = this.jwtService.sign(
       { sub: userId, secret, purpose: SETUP_TOKEN_PURPOSE },
-      { secret: process.env.JWT_ACCESS_SECRET, expiresIn: SETUP_TOKEN_TTL },
+      jwtSignOptions(TOKEN_AUDIENCE.mfaSetup, SETUP_TOKEN_TTL),
     );
     return { secret, qrCodeSvg, otpauthUri, setupToken };
   }
@@ -55,9 +66,10 @@ export class MfaService {
   ): Promise<{ encryptedSecret: string }> {
     let payload: SetupTokenPayload;
     try {
-      payload = this.jwtService.verify<SetupTokenPayload>(setupToken, {
-        secret: process.env.JWT_ACCESS_SECRET,
-      });
+      payload = this.jwtService.verify<SetupTokenPayload>(
+        setupToken,
+        jwtVerifyOptions(TOKEN_AUDIENCE.mfaSetup),
+      );
     } catch {
       throw new UnauthorizedException(
         'Setup-Token ungültig oder abgelaufen, MFA-Einrichtung neu starten',
@@ -76,16 +88,19 @@ export class MfaService {
   signChallengeToken(userId: string): string {
     return this.jwtService.sign(
       { sub: userId, purpose: CHALLENGE_TOKEN_PURPOSE },
-      { secret: process.env.JWT_ACCESS_SECRET, expiresIn: CHALLENGE_TOKEN_TTL },
+      jwtSignOptions(TOKEN_AUDIENCE.mfaChallenge, CHALLENGE_TOKEN_TTL),
     );
   }
 
-  verifyChallengeToken(challengeToken: string): { userId: string } {
-    let payload: ChallengeTokenPayload;
+  verifyChallengeToken(challengeToken: string): {
+    userId: string;
+    claims: OneTimeTokenClaims;
+  } {
+    let payload: ChallengeTokenPayload & OneTimeTokenClaims;
     try {
-      payload = this.jwtService.verify<ChallengeTokenPayload>(challengeToken, {
-        secret: process.env.JWT_ACCESS_SECRET,
-      });
+      payload = this.jwtService.verify<
+        ChallengeTokenPayload & OneTimeTokenClaims
+      >(challengeToken, jwtVerifyOptions(TOKEN_AUDIENCE.mfaChallenge));
     } catch {
       throw new UnauthorizedException(
         'Anmeldung abgelaufen, bitte erneut mit E-Mail und Passwort anmelden',
@@ -94,7 +109,25 @@ export class MfaService {
     if (payload.purpose !== CHALLENGE_TOKEN_PURPOSE) {
       throw new UnauthorizedException('Ungültiger Token');
     }
-    return { userId: payload.sub };
+    return {
+      userId: payload.sub,
+      claims: { jti: payload.jti, exp: payload.exp },
+    };
+  }
+
+  /** See verifyTotpStep; use AccountGuardService.consumeTotp for logins. */
+  async verifyCodeStep(
+    encryptedSecret: string,
+    email: string,
+    code: string,
+    afterTimeStep?: number,
+  ): Promise<number | null> {
+    return verifyTotpStep(
+      decryptMfaSecret(encryptedSecret),
+      email,
+      code,
+      afterTimeStep,
+    );
   }
 
   async verifyCode(

ApiCore-Backend/src/auth/mfa/totp.util.ts

@@ -20,6 +20,23 @@ export function buildTotpUri(secret: string, label: string): string {
   return createTotp(secret, label).toURI();
 }
 
+/**
+ * The time step a code belongs to, or null if it is wrong - or not newer
+ * than afterTimeStep (a code that was already used, or an older one).
+ */
+export async function verifyTotpStep(
+  secret: string,
+  label: string,
+  code: string,
+  afterTimeStep?: number,
+): Promise<number | null> {
+  const result = await createTotp(secret, label).verify(code, {
+    epochTolerance: EPOCH_TOLERANCE_SECONDS,
+    afterTimeStep,
+  });
+  return result.valid ? result.timeStep : null;
+}
+
 export async function verifyTotpCode(
   secret: string,
   label: string,

ApiCore-Backend/src/auth/one-time-token.service.ts

@@ -0,0 +1,38 @@
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+import { Prisma } from '../../generated/prisma';
+import { OneTimeTokenClaims } from './util/jwt-claims';
+
+/**
+ * Makes a short-lived helper token usable exactly once (SSO completion,
+ * MFA challenge after a successful code): its id is recorded, and a
+ * second presentation - a replayed request, a copied cookie - is refused.
+ * Works across replicas because the record lives in the database.
+ */
+@Injectable()
+export class OneTimeTokenService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async consume(claims: OneTimeTokenClaims): Promise<void> {
+    if (!claims.jti || !claims.exp) {
+      throw new UnauthorizedException(
+        'Anmeldung abgelaufen, bitte erneut anmelden',
+      );
+    }
+    try {
+      await this.prisma.consumedToken.create({
+        data: { jti: claims.jti, expiresAt: new Date(claims.exp * 1000) },
+      });
+    } catch (error: unknown) {
+      if (
+        error instanceof Prisma.PrismaClientKnownRequestError &&
+        error.code === 'P2002'
+      ) {
+        throw new UnauthorizedException(
+          'Diese Anmeldung wurde bereits abgeschlossen, bitte erneut anmelden',
+        );
+      }
+      throw error;
+    }
+  }
+}

ApiCore-Backend/src/auth/permissions/permission-catalog-sync.service.spec.ts

@@ -5,7 +5,7 @@ import { PERMISSION_CATALOG } from './permission-catalog';
 describe('PermissionCatalogSyncService', () => {
   let service: PermissionCatalogSyncService;
   let prisma: {
-    permission: { findMany: jest.Mock; create: jest.Mock };
+    permission: { findMany: jest.Mock; createMany: jest.Mock };
     role: { findMany: jest.Mock };
     rolePermission: { createMany: jest.Mock };
   };
@@ -13,10 +13,10 @@ describe('PermissionCatalogSyncService', () => {
   beforeEach(() => {
     prisma = {
       permission: {
+        // 1st call: existing keys (set per test). 2nd call: ids of the
+        // freshly inserted keys, derived from the `where.key.in` filter.
         findMany: jest.fn(),
-        create: jest.fn((args: { data: { key: string } }) =>
-          Promise.resolve({ id: `perm-${args.data.key}`, ...args.data }),
-        ),
+        createMany: jest.fn().mockResolvedValue({ count: 0 }),
       },
       role: { findMany: jest.fn().mockResolvedValue([]) },
       rolePermission: { createMany: jest.fn().mockResolvedValue({ count: 0 }) },
@@ -33,16 +33,16 @@ describe('PermissionCatalogSyncService', () => {
 
     await service.onModuleInit();
 
-    expect(prisma.permission.create).not.toHaveBeenCalled();
+    expect(prisma.permission.createMany).not.toHaveBeenCalled();
     expect(prisma.role.findMany).not.toHaveBeenCalled();
     expect(prisma.rolePermission.createMany).not.toHaveBeenCalled();
   });
 
   it('inserts missing catalog permissions and grants them to every system role', async () => {
     const [first, ...rest] = PERMISSION_CATALOG;
-    prisma.permission.findMany.mockResolvedValue(
-      rest.map((entry) => ({ key: entry.key })),
-    );
+    prisma.permission.findMany
+      .mockResolvedValueOnce(rest.map((entry) => ({ key: entry.key })))
+      .mockResolvedValueOnce([{ id: `perm-${first.key}` }]);
     prisma.role.findMany.mockResolvedValue([
       { id: 'role-admin' },
       { id: 'role-owner' },
@@ -50,7 +50,10 @@ describe('PermissionCatalogSyncService', () => {
 
     await service.onModuleInit();
 
-    expect(prisma.permission.create).toHaveBeenCalledWith({ data: first });
+    expect(prisma.permission.createMany).toHaveBeenCalledWith({
+      data: [first],
+      skipDuplicates: true,
+    });
     expect(prisma.role.findMany).toHaveBeenCalledWith({
       where: { isSystem: true },
       select: { id: true },
@@ -70,9 +73,26 @@ describe('PermissionCatalogSyncService', () => {
 
     await service.onModuleInit();
 
-    expect(prisma.permission.create).toHaveBeenCalledTimes(
-      PERMISSION_CATALOG.length,
-    );
+    expect(prisma.permission.createMany).toHaveBeenCalledWith({
+      data: PERMISSION_CATALOG,
+      skipDuplicates: true,
+    });
     expect(prisma.rolePermission.createMany).not.toHaveBeenCalled();
   });
+
+  it('tolerates another replica inserting the same permissions concurrently', async () => {
+    // Both replicas saw the permission as missing; the other one won the
+    // insert, so createMany skips it instead of throwing a unique error.
+    const [first, ...rest] = PERMISSION_CATALOG;
+    prisma.permission.findMany
+      .mockResolvedValueOnce(rest.map((entry) => ({ key: entry.key })))
+      .mockResolvedValueOnce([{ id: `perm-${first.key}` }]);
+    prisma.role.findMany.mockResolvedValue([{ id: 'role-admin' }]);
+
+    await expect(service.onModuleInit()).resolves.toBeUndefined();
+    expect(prisma.rolePermission.createMany).toHaveBeenCalledWith({
+      data: [{ roleId: 'role-admin', permissionId: `perm-${first.key}` }],
+      skipDuplicates: true,
+    });
+  });
 });

ApiCore-Backend/src/auth/permissions/permission-catalog-sync.service.ts

@@ -33,10 +33,18 @@ export class PermissionCatalogSyncService implements OnModuleInit {
     const missing = PERMISSION_CATALOG.filter(
       (entry) => !existingKeys.has(entry.key),
     );
-    const createdPermissions = await Promise.all(
-      missing.map((entry) => this.prisma.permission.create({ data: entry })),
-    );
     if (missing.length > 0) {
+      // skipDuplicates: several replicas boot at once against the same
+      // database and all see the same "missing" set. Plain creates made
+      // every replica but the first crash on a unique-key error.
+      await this.prisma.permission.createMany({
+        data: missing,
+        skipDuplicates: true,
+      });
+      const createdPermissions = await this.prisma.permission.findMany({
+        where: { key: { in: missing.map((entry) => entry.key) } },
+        select: { id: true },
+      });
       this.logger.log(
         `Synced ${missing.length} new permission(s) from the code catalog: ${missing
           .map((entry) => entry.key)

ApiCore-Backend/src/auth/permissions/permission-catalog.ts

@@ -111,6 +111,18 @@ export const PERMISSION_CATALOG = [
     ],
     800,
   ),
+  // Seeded with role grants by the winter_checks migration (everyday records
+  // like inspections, not an admin-only area).
+  ...group(
+    'Überwinterung',
+    'winter-checks',
+    [
+      ['read', 'Ansehen'],
+      ['create', 'Anlegen'],
+      ['update', 'Bearbeiten'],
+    ],
+    850,
+  ),
   ...group(
     'Behandlungen',
     'treatments',
@@ -306,6 +318,21 @@ export const PERMISSION_CATALOG = [
     ],
     3200,
   ),
+  // Deliberately separate from harvests:read etc.: those endpoints return
+  // internal notes and full records. The shop sync account needs only the
+  // allowlisted feed, so it gets this one permission and nothing else.
+  ...group(
+    'Shop-Synchronisation',
+    'shop-sync',
+    [['read', 'Freigegebene Daten für den Shop lesen']],
+    3300,
+  ),
+  ...group(
+    'API-Schlüssel',
+    'api-keys',
+    [['manage', 'Anlegen, ansehen und widerrufen']],
+    3400,
+  ),
 ] as const satisfies readonly PermissionCatalogEntry[];
 
 export type PermissionKey = (typeof PERMISSION_CATALOG)[number]['key'];

ApiCore-Backend/src/auth/permissions/permission-resolver.service.spec.ts

@@ -165,15 +165,34 @@ describe('PermissionResolverService', () => {
       );
     });
 
-    it('shares the cached entry with getPermissions instead of re-querying', async () => {
+    it('reads fresh every time and refreshes the cache for getPermissions', async () => {
       prisma.user.findUnique.mockResolvedValue(
         activeUserWithPermissions('colonies:read'),
       );
 
       await resolver.getPermissions('user-1');
       await resolver.isTokenValid('user-1', nowSeconds);
+      await resolver.getPermissions('user-1');
 
-      expect(prisma.user.findUnique).toHaveBeenCalledTimes(1);
+      // One read for the first getPermissions, one fresh read for the
+      // validity check - the second getPermissions uses that fresh entry.
+      expect(prisma.user.findUnique).toHaveBeenCalledTimes(2);
+    });
+
+    it('sees a deactivation made elsewhere on the next request', async () => {
+      prisma.user.findUnique.mockResolvedValueOnce(
+        activeUserWithPermissions('colonies:read'),
+      );
+      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
+        true,
+      );
+      prisma.user.findUnique.mockResolvedValueOnce({
+        ...activeUserWithPermissions('colonies:read'),
+        isActive: false,
+      });
+      await expect(resolver.isTokenValid('user-1', nowSeconds)).resolves.toBe(
+        false,
+      );
     });
   });
 

ApiCore-Backend/src/auth/permissions/permission-resolver.service.ts

@@ -37,11 +37,18 @@ export class PermissionResolverService {
     return entry.permissions;
   }
 
+  /**
+   * Always read fresh (one primary-key lookup) and stored as the cache
+   * entry the PermissionsGuard then uses: a deactivation, role change or
+   * password change made on ANOTHER replica takes effect on the very next
+   * request here, not after the cache window.
+   */
   async isTokenValid(
     userId: string,
     tokenIssuedAtSeconds: number,
   ): Promise<boolean> {
-    const entry = await this.getEntry(userId);
+    const entry = await this.loadEntry(userId);
+    this.cache.set(userId, entry);
     if (!entry.isActive) {
       return false;
     }

ApiCore-Backend/src/auth/reauth/reauth.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { MfaModule } from '../mfa/mfa.module';
+import { ReauthService } from './reauth.service';
+
+@Module({
+  imports: [MfaModule],
+  providers: [ReauthService],
+  exports: [ReauthService],
+})
+export class ReauthModule {}

ApiCore-Backend/src/auth/reauth/reauth.service.ts

@@ -0,0 +1,65 @@
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import * as bcrypt from 'bcryptjs';
+import { PrismaService } from '../../prisma/prisma.service';
+import { AccountGuardService } from '../mfa/account-guard.service';
+
+export interface ReauthProof {
+  password?: string;
+  mfaCode?: string;
+}
+
+/**
+ * Step-up check for actions that are as powerful as the account itself
+ * (restoring a backup overwrites every user): a stolen access token alone
+ * must not be enough, so the caller proves they know the password - and,
+ * with MFA on, holds the second factor - right now.
+ */
+@Injectable()
+export class ReauthService {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly accountGuard: AccountGuardService,
+  ) {}
+
+  async verify(userId: string, proof: ReauthProof): Promise<void> {
+    const user = await this.prisma.user.findUnique({
+      where: { id: userId },
+      select: {
+        id: true,
+        email: true,
+        passwordHash: true,
+        mfaEnabled: true,
+        mfaSecret: true,
+        mfaLastTimeStep: true,
+        authLockedUntil: true,
+        isActive: true,
+      },
+    });
+    if (!user || !user.isActive || this.accountGuard.isLocked(user)) {
+      throw new UnauthorizedException(
+        'Bestätigung derzeit nicht möglich. Nach mehreren Fehlversuchen ist sie für 15 Minuten gesperrt.',
+      );
+    }
+    const passwordMatches =
+      typeof proof.password === 'string' &&
+      (await bcrypt.compare(proof.password, user.passwordHash));
+    if (!passwordMatches) {
+      await this.accountGuard.recordFailure(user.id);
+      throw new UnauthorizedException(
+        'Bitte zur Bestätigung Ihr aktuelles Passwort eingeben',
+      );
+    }
+    if (user.mfaEnabled) {
+      const codeMatches =
+        typeof proof.mfaCode === 'string' &&
+        (await this.accountGuard.consumeTotp(user, proof.mfaCode));
+      if (!codeMatches) {
+        await this.accountGuard.recordFailure(user.id);
+        throw new UnauthorizedException(
+          'Bitte zur Bestätigung den aktuellen Code aus Ihrer Authenticator-App eingeben',
+        );
+      }
+    }
+    await this.accountGuard.recordSuccess(user.id);
+  }
+}

ApiCore-Backend/src/auth/sso/sso.controller.ts

@@ -17,6 +17,7 @@ import { MfaRequiredResponse } from '../auth.controller';
 import { AccessTokenDto } from '../dto/access-token.dto';
 import { SENSITIVE_ACTION_THROTTLE } from '../util/throttle';
 import { setRefreshTokenCookie } from '../util/refresh-token-cookie';
+import { OneTimeTokenService } from '../one-time-token.service';
 import { SsoService } from './sso.service';
 
 const PKCE_COOKIE = 'oidcPkceVerifier';
@@ -40,6 +41,7 @@ export class SsoController {
   constructor(
     private readonly ssoService: SsoService,
     private readonly authService: AuthService,
+    private readonly oneTimeTokens: OneTimeTokenService,
   ) {}
 
   private frontendLoginUrl(): string {
@@ -82,7 +84,7 @@ export class SsoController {
     const rawCookie = (req.cookies as Record<string, string> | undefined)?.[
       PKCE_COOKIE
     ];
-    res.clearCookie(PKCE_COOKIE, { path: PKCE_COOKIE_PATH });
+    res.clearCookie(PKCE_COOKIE, this.cookieOptions(PKCE_COOKIE_PATH, 0));
 
     const pkce = this.parsePkceCookie(rawCookie);
     if (!pkce) {
@@ -90,10 +92,10 @@ export class SsoController {
       return;
     }
 
-    const callbackUrl = new URL(
-      req.originalUrl,
-      `${req.protocol}://${req.get('host')}`,
-    );
+    // Built from the configured redirect URI, not from the Host header a
+    // client sends; only the query (code, state, iss) comes from the request.
+    const callbackUrl = new URL(process.env.OIDC_REDIRECT_URI as string);
+    callbackUrl.search = new URL(req.originalUrl, 'http://placeholder').search;
     const result = await this.ssoService.handleCallback(
       callbackUrl,
       pkce.codeVerifier,
@@ -126,13 +128,17 @@ export class SsoController {
     const ssoCode = (req.cookies as Record<string, string> | undefined)?.[
       SSO_CODE_COOKIE
     ];
-    res.clearCookie(SSO_CODE_COOKIE, { path: SSO_CODE_COOKIE_PATH });
+    res.clearCookie(
+      SSO_CODE_COOKIE,
+      this.cookieOptions(SSO_CODE_COOKIE_PATH, 0),
+    );
     if (!ssoCode) {
       throw new UnauthorizedException(
         'SSO-Anmeldung abgelaufen, bitte erneut versuchen',
       );
     }
-    const { userId } = this.ssoService.verifySsoCode(ssoCode);
+    const { userId, claims } = this.ssoService.verifySsoCode(ssoCode);
+    await this.oneTimeTokens.consume(claims);
     const result = await this.authService.issueTokensForSsoUser(userId);
     if (result.mfaRequired) {
       return { mfaRequired: true, mfaToken: result.mfaToken };

ApiCore-Backend/src/auth/sso/sso.service.spec.ts

@@ -18,9 +18,26 @@ jest.mock('openid-client', () => ({
 
 const mockedClient = client as jest.Mocked<typeof client>;
 
+const IDENTITY = {
+  iss: 'https://login.microsoftonline.com/tenant/v2.0',
+  sub: 'pairwise-sub',
+  oid: 'object-id-1',
+};
+const SSO_SUBJECT = `${IDENTITY.iss}|${IDENTITY.oid}`;
+
+function grantWithClaims(claims: Record<string, unknown>) {
+  return {
+    claims: () => claims,
+  } as unknown as Awaited<ReturnType<typeof client.authorizationCodeGrant>>;
+}
+
 describe('SsoService', () => {
   let ssoService: SsoService;
-  let usersService: { findByEmail: jest.Mock };
+  let usersService: {
+    findByEmail: jest.Mock;
+    findBySsoSubject: jest.Mock;
+    linkSsoSubject: jest.Mock;
+  };
   let jwtService: { sign: jest.Mock; verify: jest.Mock };
   const originalEnv = { ...process.env };
 
@@ -33,7 +50,11 @@ describe('SsoService', () => {
     process.env.OIDC_REDIRECT_URI =
       'https://api.example.com/api/v1/auth/sso/callback';
     process.env.JWT_ACCESS_SECRET = 'unit-test-jwt-access-secret';
-    usersService = { findByEmail: jest.fn() };
+    usersService = {
+      findByEmail: jest.fn(),
+      findBySsoSubject: jest.fn().mockResolvedValue(null),
+      linkSsoSubject: jest.fn(),
+    };
     jwtService = { sign: jest.fn(), verify: jest.fn() };
     ssoService = new SsoService(
       usersService as unknown as UsersService,
@@ -50,6 +71,12 @@ describe('SsoService', () => {
       expect(ssoService.isConfigured()).toBe(true);
     });
 
+    it('returns false for a multi-tenant issuer', () => {
+      process.env.OIDC_ISSUER_URL =
+        'https://login.microsoftonline.com/common/v2.0';
+      expect(ssoService.isConfigured()).toBe(false);
+    });
+
     it('returns false when a variable is missing', () => {
       delete process.env.OIDC_CLIENT_SECRET;
       expect(ssoService.isConfigured()).toBe(false);
@@ -116,7 +143,7 @@ describe('SsoService', () => {
 
     it('returns no_email when the ID token has neither email nor preferred_username', async () => {
       mockedClient.authorizationCodeGrant.mockResolvedValue({
-        claims: () => ({ sub: 'abc' }),
+        claims: () => ({ ...IDENTITY }),
       } as unknown as Awaited<
         ReturnType<typeof client.authorizationCodeGrant>
       >);
@@ -132,7 +159,7 @@ describe('SsoService', () => {
 
     it('returns no_account when no active local user matches the email claim', async () => {
       mockedClient.authorizationCodeGrant.mockResolvedValue({
-        claims: () => ({ email: '[email protected]' }),
+        claims: () => ({ ...IDENTITY, email: '[email protected]' }),
       } as unknown as Awaited<
         ReturnType<typeof client.authorizationCodeGrant>
       >);
@@ -149,7 +176,10 @@ describe('SsoService', () => {
 
     it('signs a short-lived sso-complete token for an active matching user', async () => {
       mockedClient.authorizationCodeGrant.mockResolvedValue({
-        claims: () => ({ preferred_username: '[email protected]' }),
+        claims: () => ({
+          ...IDENTITY,
+          preferred_username: '[email protected]',
+        }),
       } as unknown as Awaited<
         ReturnType<typeof client.authorizationCodeGrant>
       >);
@@ -175,6 +205,56 @@ describe('SsoService', () => {
         expect.objectContaining({ sub: 'user-1', purpose: 'sso-complete' }),
         expect.objectContaining({ expiresIn: '60s' }),
       );
+      expect(usersService.linkSsoSubject).toHaveBeenCalledWith(
+        'user-1',
+        SSO_SUBJECT,
+      );
+    });
+
+    it('signs in a linked account by its identity, whatever the email claim says', async () => {
+      mockedClient.authorizationCodeGrant.mockResolvedValue(
+        grantWithClaims({ ...IDENTITY, email: '[email protected]' }),
+      );
+      usersService.findBySsoSubject.mockResolvedValue({
+        id: 'user-1',
+        isActive: true,
+      });
+      jwtService.sign.mockReturnValue('signed-sso-code');
+
+      const result = await ssoService.handleCallback(
+        new URL('https://api.example.com/callback?code=x'),
+        'verifier',
+        'random-state',
+      );
+
+      expect(result).toEqual({ status: 'success', ssoCode: 'signed-sso-code' });
+      expect(usersService.findBySsoSubject).toHaveBeenCalledWith(SSO_SUBJECT);
+      expect(usersService.findByEmail).not.toHaveBeenCalled();
+    });
+
+    it('refuses a matching email when the account is linked to another identity', async () => {
+      mockedClient.authorizationCodeGrant.mockResolvedValue(
+        grantWithClaims({
+          ...IDENTITY,
+          oid: 'attacker-object-id',
+          email: '[email protected]',
+        }),
+      );
+      usersService.findByEmail.mockResolvedValue({
+        id: 'user-1',
+        isActive: true,
+        ssoSubject: SSO_SUBJECT,
+      });
+
+      const result = await ssoService.handleCallback(
+        new URL('https://api.example.com/callback?code=x'),
+        'verifier',
+        'random-state',
+      );
+
+      expect(result).toEqual({ status: 'error', reason: 'no_account' });
+      expect(jwtService.sign).not.toHaveBeenCalled();
+      expect(usersService.linkSsoSubject).not.toHaveBeenCalled();
     });
   });
 
@@ -183,8 +263,13 @@ describe('SsoService', () => {
       jwtService.verify.mockReturnValue({
         sub: 'user-1',
         purpose: 'sso-complete',
+        jti: 'jti-1',
+        exp: 1_900_000_000,
+      });
+      expect(ssoService.verifySsoCode('token')).toEqual({
+        userId: 'user-1',
+        claims: { jti: 'jti-1', exp: 1_900_000_000 },
       });
-      expect(ssoService.verifySsoCode('token')).toEqual({ userId: 'user-1' });
     });
 
     it('throws UnauthorizedException when verification fails', () => {

ApiCore-Backend/src/auth/sso/sso.service.ts

@@ -7,6 +7,12 @@ import {
 import { JwtService } from '@nestjs/jwt';
 import * as client from 'openid-client';
 import { UsersService } from '../../users/users.service';
+import {
+  OneTimeTokenClaims,
+  TOKEN_AUDIENCE,
+  jwtSignOptions,
+  jwtVerifyOptions,
+} from '../util/jwt-claims';
 
 const SSO_COMPLETE_TOKEN_TTL = '60s';
 const SSO_COMPLETE_TOKEN_PURPOSE = 'sso-complete';
@@ -16,6 +22,21 @@ interface SsoCompleteTokenPayload {
   purpose: typeof SSO_COMPLETE_TOKEN_PURPOSE;
 }
 
+// Entra's shared endpoints accept users of ANY tenant - with them, anyone
+// able to create an account in some tenant could present a matching email.
+const MULTI_TENANT_SEGMENTS = new Set(['common', 'organizations', 'consumers']);
+
+function isSingleTenantIssuer(issuerUrl: string): boolean {
+  try {
+    const segments = new URL(issuerUrl).pathname.split('/').filter(Boolean);
+    return !segments.some((segment) =>
+      MULTI_TENANT_SEGMENTS.has(segment.toLowerCase()),
+    );
+  } catch {
+    return false;
+  }
+}
+
 export type SsoCallbackResult =
   | { status: 'success'; ssoCode: string }
   | { status: 'error'; reason: 'exchange_failed' | 'no_email' | 'no_account' };
@@ -31,12 +52,22 @@ export class SsoService {
   ) {}
 
   isConfigured(): boolean {
-    return Boolean(
-      process.env.OIDC_ISSUER_URL &&
-      process.env.OIDC_CLIENT_ID &&
-      process.env.OIDC_CLIENT_SECRET &&
-      process.env.OIDC_REDIRECT_URI,
+    const issuer = process.env.OIDC_ISSUER_URL;
+    if (
+      !issuer ||
+      !process.env.OIDC_CLIENT_ID ||
+      !process.env.OIDC_CLIENT_SECRET ||
+      !process.env.OIDC_REDIRECT_URI
+    ) {
+      return false;
+    }
+    if (!isSingleTenantIssuer(issuer)) {
+      this.logger.error(
+        'SSO disabled: OIDC_ISSUER_URL must name one tenant (not common/organizations/consumers)',
       );
+      return false;
+    }
+    return true;
   }
 
   private async getConfig(): Promise<client.Configuration> {
@@ -93,6 +124,27 @@ export class SsoService {
       return { status: 'error', reason: 'exchange_failed' };
     }
     const claims = tokens.claims();
+    // The account is bound to the IdP's immutable identity (issuer + object
+    // id), not to the email claim: Entra does not verify email or
+    // preferred_username, so a mutable claim alone must never pick the
+    // account.
+    const objectId =
+      (claims?.oid as string | undefined) ?? claims?.sub ?? undefined;
+    const ssoSubject =
+      claims?.iss && objectId ? `${claims.iss}|${objectId}` : null;
+    if (!ssoSubject) {
+      this.logger.warn('SSO callback succeeded but ID token had no subject');
+      return { status: 'error', reason: 'no_account' };
+    }
+    const linked = await this.usersService.findBySsoSubject(ssoSubject);
+    if (linked) {
+      if (!linked.isActive) {
+        this.logger.warn(`SSO login denied: user ${linked.id} is deactivated`);
+        return { status: 'error', reason: 'no_account' };
+      }
+      return { status: 'success', ssoCode: this.signSsoCode(linked.id) };
+    }
+
     const email =
       (claims?.email as string | undefined) ??
       (claims?.preferred_username as string | undefined);
@@ -104,27 +156,38 @@ export class SsoService {
     }
     const user = await this.usersService.findByEmail(email);
     if (!user || !user.isActive) {
+      this.logger.warn('SSO login denied: no active local account for email');
+      return { status: 'error', reason: 'no_account' };
+    }
+    if (user.ssoSubject) {
+      // Already bound to a different IdP identity: someone else is
+      // presenting this email.
       this.logger.warn(
-        `SSO login denied: no active local account for ${email}`,
+        `SSO login denied: user ${user.id} is linked to another identity`,
       );
       return { status: 'error', reason: 'no_account' };
     }
-    const ssoCode = this.jwtService.sign(
-      { sub: user.id, purpose: SSO_COMPLETE_TOKEN_PURPOSE },
-      {
-        secret: process.env.JWT_ACCESS_SECRET,
-        expiresIn: SSO_COMPLETE_TOKEN_TTL,
-      },
-    );
-    return { status: 'success', ssoCode };
+    // First sign-in: bind the account to this identity for good.
+    await this.usersService.linkSsoSubject(user.id, ssoSubject);
+    return { status: 'success', ssoCode: this.signSsoCode(user.id) };
   }
 
-  verifySsoCode(ssoCode: string): { userId: string } {
-    let payload: SsoCompleteTokenPayload;
+  private signSsoCode(userId: string): string {
+    return this.jwtService.sign(
+      { sub: userId, purpose: SSO_COMPLETE_TOKEN_PURPOSE },
+      jwtSignOptions(TOKEN_AUDIENCE.ssoComplete, SSO_COMPLETE_TOKEN_TTL),
+    );
+  }
+
+  verifySsoCode(ssoCode: string): {
+    userId: string;
+    claims: OneTimeTokenClaims;
+  } {
+    let payload: SsoCompleteTokenPayload & OneTimeTokenClaims;
     try {
-      payload = this.jwtService.verify<SsoCompleteTokenPayload>(ssoCode, {
-        secret: process.env.JWT_ACCESS_SECRET,
-      });
+      payload = this.jwtService.verify<
+        SsoCompleteTokenPayload & OneTimeTokenClaims
+      >(ssoCode, jwtVerifyOptions(TOKEN_AUDIENCE.ssoComplete));
     } catch {
       throw new UnauthorizedException(
         'SSO-Anmeldung abgelaufen, bitte erneut versuchen',
@@ -133,6 +196,9 @@ export class SsoService {
     if (payload.purpose !== SSO_COMPLETE_TOKEN_PURPOSE) {
       throw new UnauthorizedException('Ungültiger Token');
     }
-    return { userId: payload.sub };
+    return {
+      userId: payload.sub,
+      claims: { jti: payload.jti, exp: payload.exp },
+    };
   }
 }

ApiCore-Backend/src/auth/strategies/jwt.strategy.ts

@@ -1,7 +1,8 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, UnauthorizedException } from '@nestjs/common';
 import { PassportStrategy } from '@nestjs/passport';
 import { ExtractJwt, Strategy } from 'passport-jwt';
 import { AuthenticatedUser } from '../types/authenticated-user';
+import { JWT_ALGORITHM, JWT_ISSUER, TOKEN_AUDIENCE } from '../util/jwt-claims';
 
 interface AccessTokenPayload {
   sub: string;
@@ -10,6 +11,8 @@ interface AccessTokenPayload {
   // reject tokens issued before the user's last password change (see
   // PermissionResolverService.isTokenValid).
   iat: number;
+  // Set only on the helper tokens (MFA setup/challenge, SSO completion).
+  purpose?: string;
 }
 
 @Injectable()
@@ -19,10 +22,19 @@ export class JwtStrategy extends PassportStrategy(Strategy) {
       jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
       ignoreExpiration: false,
       secretOrKey: process.env.JWT_ACCESS_SECRET as string,
+      // Only access tokens: the MFA challenge token (issued after the
+      // password step, before the second factor) shares the secret and must
+      // never open a session on its own.
+      algorithms: [JWT_ALGORITHM],
+      issuer: JWT_ISSUER,
+      audience: TOKEN_AUDIENCE.access,
     });
   }
 
   validate(payload: AccessTokenPayload): AuthenticatedUser {
+    if (payload.purpose !== undefined || typeof payload.sub !== 'string') {
+      throw new UnauthorizedException();
+    }
     return {
       id: payload.sub,
       email: payload.email,

ApiCore-Backend/src/auth/util/jwt-claims.ts

@@ -0,0 +1,56 @@
+import type { JwtSignOptions, JwtVerifyOptions } from '@nestjs/jwt';
+import { randomUUID } from 'node:crypto';
+
+/**
+ * Every JWT ApiCore issues is signed with JWT_ACCESS_SECRET, so the token's
+ * audience - not the secret - is what tells an access token apart from the
+ * short-lived helper tokens (MFA setup, MFA challenge, SSO completion).
+ * Without a pinned audience, the MFA challenge token handed out after the
+ * password step would pass the access-token strategy and skip the second
+ * factor entirely.
+ *
+ * Algorithm and issuer are pinned as well, so a token is only ever accepted
+ * in the exact shape ApiCore itself produces.
+ */
+export const JWT_ISSUER = 'apicore';
+export const JWT_ALGORITHM = 'HS256';
+
+export const TOKEN_AUDIENCE = {
+  access: 'apicore:access',
+  mfaSetup: 'apicore:mfa-setup',
+  mfaChallenge: 'apicore:mfa-challenge',
+  ssoComplete: 'apicore:sso-complete',
+} as const;
+
+export type TokenAudience =
+  (typeof TOKEN_AUDIENCE)[keyof typeof TOKEN_AUDIENCE];
+
+export function jwtSignOptions(
+  audience: TokenAudience,
+  expiresIn: JwtSignOptions['expiresIn'],
+): JwtSignOptions {
+  return {
+    secret: process.env.JWT_ACCESS_SECRET,
+    algorithm: JWT_ALGORITHM,
+    issuer: JWT_ISSUER,
+    audience,
+    expiresIn,
+    // Unique id, so a one-time token can be marked as used.
+    jwtid: randomUUID(),
+  };
+}
+
+/** What a verified one-time token carries for OneTimeTokenService. */
+export interface OneTimeTokenClaims {
+  jti?: string;
+  exp?: number;
+}
+
+export function jwtVerifyOptions(audience: TokenAudience): JwtVerifyOptions {
+  return {
+    secret: process.env.JWT_ACCESS_SECRET,
+    algorithms: [JWT_ALGORITHM],
+    issuer: JWT_ISSUER,
+    audience,
+  };
+}

ApiCore-Backend/src/auth/util/refresh-token-cookie.ts

@@ -5,24 +5,32 @@ import { parseDurationToMs } from './duration';
 export const REFRESH_TOKEN_COOKIE = 'refreshToken';
 export const REFRESH_TOKEN_COOKIE_PATH = '/api/v1/auth';
 
-export function setRefreshTokenCookie(
-  res: Response,
-  refreshToken: string,
-): void {
-  res.cookie(REFRESH_TOKEN_COOKIE, refreshToken, {
+function cookieOptions() {
+  return {
     httpOnly: true,
     // Explicit opt-out for local HTTP dev only; every real deployment must
     // set COOKIE_SECURE=true so the refresh-token cookie is never sent
     // over plaintext HTTP.
     secure: process.env.COOKIE_SECURE !== 'false',
-    sameSite: 'lax',
+    sameSite: 'lax' as const,
     path: REFRESH_TOKEN_COOKIE_PATH,
+  };
+}
+
+export function setRefreshTokenCookie(
+  res: Response,
+  refreshToken: string,
+): void {
+  res.cookie(REFRESH_TOKEN_COOKIE, refreshToken, {
+    ...cookieOptions(),
     maxAge: parseDurationToMs(process.env.JWT_REFRESH_EXPIRES_IN ?? '7d'),
   });
 }
 
+// Same attributes as when set - some browsers keep a cookie that is
+// cleared with different ones.
 export function clearRefreshTokenCookie(res: Response): void {
-  res.clearCookie(REFRESH_TOKEN_COOKIE, { path: REFRESH_TOKEN_COOKIE_PATH });
+  res.clearCookie(REFRESH_TOKEN_COOKIE, cookieOptions());
 }
 
 export function extractRefreshToken(req: Request): string {

ApiCore-Backend/src/automation/automation.service.spec.ts

@@ -4,6 +4,7 @@ import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
 import { NotificationsService } from '../notifications/notifications.service';
 import { WebhooksService } from '../webhooks/webhooks.service';
+import { AutomationTriggerType } from '../../generated/prisma';
 
 describe('AutomationService', () => {
   let service: AutomationService;
@@ -14,7 +15,7 @@ describe('AutomationService', () => {
       findUnique: jest.Mock;
       update: jest.Mock;
     };
-    task: { create: jest.Mock };
+    task: { create: jest.Mock; findFirst: jest.Mock };
   };
   let auditLog: { record: jest.Mock };
   let notifications: { record: jest.Mock };
@@ -50,7 +51,10 @@ describe('AutomationService', () => {
         findUnique: jest.fn(),
         update: jest.fn(),
       },
-      task: { create: jest.fn().mockResolvedValue({ id: 'task-1' }) },
+      task: {
+        create: jest.fn().mockResolvedValue({ id: 'task-1' }),
+        findFirst: jest.fn().mockResolvedValue(null),
+      },
     };
     auditLog = { record: jest.fn() };
     notifications = { record: jest.fn() };
@@ -79,7 +83,9 @@ describe('AutomationService', () => {
 
     const result = await service.findAll();
 
-    expect(prisma.automationRule.upsert).toHaveBeenCalledTimes(8);
+    expect(prisma.automationRule.upsert).toHaveBeenCalledTimes(
+      Object.values(AutomationTriggerType).length,
+    );
     expect(result).toHaveLength(3);
   });
 
@@ -154,6 +160,7 @@ describe('AutomationService', () => {
       await service.evaluateVarroaMeasurement({
         id: 'measurement-1',
         colonyId: 'colony-1',
+        method: 'NATURAL_MITE_FALL',
         calculatedValue: 12,
         miteCount: null,
       } as never);
@@ -167,6 +174,7 @@ describe('AutomationService', () => {
       await service.evaluateVarroaMeasurement({
         id: 'measurement-2',
         colonyId: 'colony-1',
+        method: 'NATURAL_MITE_FALL',
         calculatedValue: 5,
         miteCount: null,
       } as never);
@@ -174,17 +182,59 @@ describe('AutomationService', () => {
       expect(prisma.task.create).not.toHaveBeenCalled();
     });
 
-    it('falls back to miteCount when calculatedValue is null', async () => {
+    it('ignores a raw board count without a per-day rate', async () => {
+      // 15 mites over an unknown number of days says nothing about the
+      // per-day threshold - comparing them would be a unit error.
       prisma.automationRule.findUnique.mockResolvedValue(varroaRule);
 
       await service.evaluateVarroaMeasurement({
         id: 'measurement-3',
         colonyId: 'colony-1',
+        method: 'NATURAL_MITE_FALL',
         calculatedValue: null,
         miteCount: 15,
       } as never);
 
-      expect(prisma.task.create).toHaveBeenCalledTimes(1);
+      expect(prisma.task.create).not.toHaveBeenCalled();
+    });
+
+    it('ignores sample-based methods, whose values use another unit', async () => {
+      prisma.automationRule.findUnique.mockResolvedValue(varroaRule);
+
+      await service.evaluateVarroaMeasurement({
+        id: 'measurement-4',
+        colonyId: 'colony-1',
+        method: 'WASHING_METHOD',
+        calculatedValue: 30,
+        miteCount: 30,
+      } as never);
+
+      expect(prisma.task.create).not.toHaveBeenCalled();
+    });
+
+    it('adds no second task while one for the same colony is still open', async () => {
+      prisma.automationRule.findUnique.mockResolvedValue(varroaRule);
+      prisma.task.findFirst.mockResolvedValue({ id: 'open-task' });
+
+      await service.evaluateVarroaMeasurement({
+        id: 'measurement-5',
+        colonyId: 'colony-1',
+        method: 'NATURAL_MITE_FALL',
+        calculatedValue: 25,
+        miteCount: 25,
+      } as never);
+
+      expect(prisma.task.create).not.toHaveBeenCalled();
+      expect(notifications.record).not.toHaveBeenCalled();
+      expect(prisma.task.findFirst).toHaveBeenCalledWith({
+        where: {
+          sourceAutomationTrigger: 'VARROA_THRESHOLD',
+          relatedType: 'COLONY',
+          relatedId: 'colony-1',
+          status: { in: ['OPEN', 'IN_PROGRESS'] },
+        },
+        select: { id: true },
+      });
     });
   });
 

ApiCore-Backend/src/automation/automation.service.ts

@@ -8,10 +8,12 @@ import {
   AutomationTriggerType,
   Colony,
   Inspection,
+  Feeding,
   Prisma,
   StockItem,
   SwarmControlCheck,
   TaskRelatedType,
+  Treatment,
   VarroaMeasurement,
 } from '../../generated/prisma';
 import { UpdateAutomationRuleDto } from './dto/update-automation-rule.dto';
@@ -20,6 +22,8 @@ import { formatGeneratedNumber } from './number-format';
 interface RuleDefaults {
   config: Record<string, unknown>;
   actionTemplate: string;
+  /** Rules without a sensible built-in setting start switched off. */
+  active?: boolean;
 }
 
 const DEFAULT_RULES: Record<AutomationTriggerType, RuleDefaults> = {
@@ -60,8 +64,55 @@ const DEFAULT_RULES: Record<AutomationTriggerType, RuleDefaults> = {
     config: { format: 'WH-{YYYY}-{SEQ:4}' },
     actionTemplate: '',
   },
+  // Follow-up checks: how many days after a treatment or feeding a check
+  // makes sense depends on the product and the season, so there is no
+  // built-in interval - the beekeeper switches the rule on and sets
+  // config.dueInDays.
+  TREATMENT_FOLLOW_UP: {
+    config: {},
+    actionTemplate: 'Behandlungserfolg kontrollieren',
+    active: false,
+  },
+  FEEDING_FOLLOW_UP: {
+    config: {},
+    actionTemplate: 'Futterabnahme und Futtervorrat kontrollieren',
+    active: false,
+  },
 };
 
+/**
+ * Optional per-rule follow-up interval (config.dueInDays). There is no
+ * built-in default: how soon a queenless colony or a high mite fall needs a
+ * look depends on season and practice, so the rule stays date-less unless the
+ * beekeeper configures one.
+ */
+function formatDay(date: Date): string {
+  return date.toLocaleDateString('de-DE', {
+    day: '2-digit',
+    month: '2-digit',
+    year: 'numeric',
+    timeZone: 'UTC',
+  });
+}
+
+function dueDateFromConfig(
+  dueInDays: unknown,
+  baseDate: Date = new Date(),
+): Date | undefined {
+  if (
+    typeof dueInDays !== 'number' ||
+    !Number.isInteger(dueInDays) ||
+    dueInDays < 0 ||
+    dueInDays > 365
+  ) {
+    return undefined;
+  }
+  const due = new Date(baseDate);
+  due.setUTCHours(0, 0, 0, 0);
+  due.setUTCDate(due.getUTCDate() + dueInDays);
+  return due;
+}
+
 @Injectable()
 export class AutomationService {
   constructor(
@@ -81,6 +132,7 @@ export class AutomationService {
         update: {},
         create: {
           triggerType,
+          active: defaults.active ?? true,
           config: defaults.config as Prisma.InputJsonValue,
           actionTemplate: defaults.actionTemplate,
         },
@@ -174,9 +226,16 @@ export class AutomationService {
     if (!rule || !rule.active) {
       return;
     }
+    // The threshold is a natural mite fall rate (mites per day). Only that
+    // method yields a value in this unit - a mite count from a sugar roll or
+    // wash is per bee sample and would be compared against the wrong scale,
+    // as would a raw board count without the number of days it covered.
+    if (measurement.method !== 'NATURAL_MITE_FALL') {
+      return;
+    }
     const config = rule.config as { thresholdMitesPerDay?: number } | null;
     const threshold = config?.thresholdMitesPerDay ?? 10;
-    const value = measurement.calculatedValue ?? measurement.miteCount;
+    const value = measurement.calculatedValue;
     if (value !== null && value >= threshold) {
       await this.triggerAction(rule, 'COLONY', measurement.colonyId);
     }
@@ -227,6 +286,44 @@ export class AutomationService {
     await this.triggerAction(rule, 'STORAGE', item.id);
   }
 
+  async evaluateTreatment(treatment: Treatment): Promise<void> {
+    await this.evaluateFollowUp(
+      'TREATMENT_FOLLOW_UP',
+      treatment.colonyId,
+      treatment.endDate ?? treatment.date,
+      `Nach Behandlung mit ${treatment.product} am ${formatDay(treatment.endDate ?? treatment.date)}.`,
+    );
+  }
+
+  async evaluateFeeding(feeding: Feeding): Promise<void> {
+    await this.evaluateFollowUp(
+      'FEEDING_FOLLOW_UP',
+      feeding.colonyId,
+      feeding.date,
+      `Nach Fütterung (${feeding.amount} ${feeding.unit}) am ${formatDay(feeding.date)}.`,
+    );
+  }
+
+  /** A check counted from the measure's own date, not from today. */
+  private async evaluateFollowUp(
+    triggerType: 'TREATMENT_FOLLOW_UP' | 'FEEDING_FOLLOW_UP',
+    colonyId: string,
+    measureDate: Date,
+    description: string,
+  ): Promise<void> {
+    await this.ensureDefaults();
+    const rule = await this.prisma.automationRule.findUnique({
+      where: { triggerType },
+    });
+    if (!rule || !rule.active) {
+      return;
+    }
+    await this.triggerAction(rule, 'COLONY', colonyId, undefined, {
+      baseDate: measureDate,
+      description,
+    });
+  }
+
   // Returns null (never throws) when the rule is inactive or has no format
   // configured, so the caller can fall back to requiring manual entry.
   async generateNumber(
@@ -274,13 +371,36 @@ export class AutomationService {
     return rule;
   }
 
+  /**
+   * Leaves a suggestion task (never a record of work done) plus a warning.
+   *
+   * At most one open task per rule and object: while the reorder task for a
+   * stock item or the check task for a colony is still open, further triggers
+   * (the next removal below minimum, a second high varroa count) add nothing.
+   * Repeating the same alarm would only bury the one task that matters.
+   */
   private async triggerAction(
     rule: AutomationRule,
     relatedType: TaskRelatedType,
     relatedId: string,
     sourceInspectionId?: string,
+    options: { baseDate?: Date; description?: string } = {},
   ): Promise<void> {
+    const alreadyOpen = await this.prisma.task.findFirst({
+      where: {
+        sourceAutomationTrigger: rule.triggerType,
+        relatedType,
+        relatedId,
+        status: { in: ['OPEN', 'IN_PROGRESS'] },
+      },
+      select: { id: true },
+    });
+    if (alreadyOpen) {
+      return;
+    }
+
     const title = rule.actionTemplate ?? 'Automatisierte Aufgabe';
+    const config = rule.config as { dueInDays?: unknown } | null;
     const task = await this.prisma.task.create({
       data: {
         title,
@@ -288,6 +408,9 @@ export class AutomationService {
         relatedType,
         relatedId,
         sourceInspectionId,
+        sourceAutomationTrigger: rule.triggerType,
+        description: options.description,
+        dueDate: dueDateFromConfig(config?.dueInDays, options.baseDate),
       },
     });
     await this.webhooks.dispatch('task.created', task);

ApiCore-Backend/src/backup/backup-crypto.spec.ts

@@ -0,0 +1,67 @@
+import { BadRequestException } from '@nestjs/common';
+import { isSealedBackup, openBackup, sealBackup } from './backup-crypto';
+
+describe('backup-crypto', () => {
+  const originalEnv = { ...process.env };
+  const bundle = {
+    version: 2,
+    exportedAt: '2026-10-01T09:00:00.000Z',
+    data: { user: [{ id: 'u1', passwordHash: '$2a$12$secret' }] },
+  };
+
+  beforeEach(() => {
+    process.env.JWT_ACCESS_SECRET = 'x'.repeat(40);
+    delete process.env.BACKUP_ENCRYPTION_KEY;
+  });
+
+  afterEach(() => {
+    process.env = { ...originalEnv };
+  });
+
+  it('round-trips a bundle and hides its contents', () => {
+    const sealed = sealBackup(bundle, bundle.exportedAt);
+
+    expect(isSealedBackup(sealed)).toBe(true);
+    expect(JSON.stringify(sealed)).not.toContain('passwordHash');
+    expect(JSON.stringify(sealed)).not.toContain('$2a$12$secret');
+    expect(openBackup(sealed)).toEqual(bundle);
+  });
+
+  it('rejects a file whose ciphertext was changed', () => {
+    const sealed = sealBackup(bundle, bundle.exportedAt);
+    const bytes = Buffer.from(sealed.ciphertext, 'base64');
+    bytes[0] ^= 0xff;
+
+    expect(() =>
+      openBackup({ ...sealed, ciphertext: bytes.toString('base64') }),
+    ).toThrow(BadRequestException);
+  });
+
+  it('rejects a file whose header was changed', () => {
+    const sealed = sealBackup(bundle, bundle.exportedAt);
+
+    expect(() =>
+      openBackup({ ...sealed, exportedAt: '2020-01-01T00:00:00.000Z' }),
+    ).toThrow(BadRequestException);
+  });
+
+  it('rejects a file sealed with another key', () => {
+    const sealed = sealBackup(bundle, bundle.exportedAt);
+    process.env.BACKUP_ENCRYPTION_KEY = 'y'.repeat(40);
+
+    expect(() => openBackup(sealed)).toThrow(BadRequestException);
+  });
+
+  it('uses BACKUP_ENCRYPTION_KEY independently of the JWT secret', () => {
+    process.env.BACKUP_ENCRYPTION_KEY = 'k'.repeat(40);
+    const sealed = sealBackup(bundle, bundle.exportedAt);
+    process.env.JWT_ACCESS_SECRET = 'z'.repeat(40);
+
+    expect(openBackup(sealed)).toEqual(bundle);
+  });
+
+  it('refuses a too short BACKUP_ENCRYPTION_KEY', () => {
+    process.env.BACKUP_ENCRYPTION_KEY = 'short';
+    expect(() => sealBackup(bundle, bundle.exportedAt)).toThrow();
+  });
+});

ApiCore-Backend/src/backup/backup-crypto.ts

@@ -0,0 +1,155 @@
+import { BadRequestException } from '@nestjs/common';
+import * as crypto from 'node:crypto';
+import * as zlib from 'node:zlib';
+
+/**
+ * A backup holds everything - password hashes, encrypted MFA secrets,
+ * webhook signing secrets - and an import writes straight into the users
+ * table. So the file is sealed: AES-256-GCM over the gzipped bundle, which
+ * keeps it unreadable outside ApiCore AND makes any change to it (or a
+ * hand-made file) fail authentication before a single row is touched.
+ *
+ * Key: BACKUP_ENCRYPTION_KEY when set (needed to restore into another
+ * deployment), otherwise derived from JWT_ACCESS_SECRET - so a deployment
+ * can always restore its own backups. Either way the AES key comes from
+ * HKDF with a backup-specific label, never the raw secret.
+ */
+export const SEALED_BACKUP_FORMAT = 'apicore-backup';
+export const SEALED_BACKUP_VERSION = 3;
+
+const ALGORITHM = 'aes-256-gcm';
+const IV_BYTES = 12;
+const MIN_KEY_LENGTH = 32;
+// Decompressed size cap: a small file must not unpack into gigabytes.
+const MAX_PLAINTEXT_BYTES = 512 * 1024 * 1024;
+
+export interface SealedBackup {
+  format: typeof SEALED_BACKUP_FORMAT;
+  version: typeof SEALED_BACKUP_VERSION;
+  algorithm: 'A256GCM+gzip';
+  /** Tells which key a file needs, without revealing the key. */
+  keyId: string;
+  exportedAt: string;
+  iv: string;
+  tag: string;
+  ciphertext: string;
+}
+
+function rootSecret(): { secret: string; source: 'backup' | 'jwt' } {
+  const backupKey = process.env.BACKUP_ENCRYPTION_KEY;
+  if (backupKey) {
+    if (backupKey.length < MIN_KEY_LENGTH) {
+      throw new Error(
+        `BACKUP_ENCRYPTION_KEY must be at least ${MIN_KEY_LENGTH} characters`,
+      );
+    }
+    return { secret: backupKey, source: 'backup' };
+  }
+  const jwtSecret = process.env.JWT_ACCESS_SECRET;
+  if (!jwtSecret) {
+    throw new Error('JWT_ACCESS_SECRET is not set');
+  }
+  return { secret: jwtSecret, source: 'jwt' };
+}
+
+function deriveKey(): { key: Buffer; keyId: string } {
+  const { secret, source } = rootSecret();
+  const key = Buffer.from(
+    crypto.hkdfSync(
+      'sha256',
+      secret,
+      'apicore-backup',
+      `apicore-backup-v${SEALED_BACKUP_VERSION}:${source}`,
+      32,
+    ),
+  );
+  const keyId = crypto
+    .createHash('sha256')
+    .update(key)
+    .digest('hex')
+    .slice(0, 12);
+  return { key, keyId };
+}
+
+function associatedData(
+  header: Pick<SealedBackup, 'format' | 'version' | 'keyId' | 'exportedAt'>,
+): Buffer {
+  return Buffer.from(
+    `${header.format}|${header.version}|${header.keyId}|${header.exportedAt}`,
+  );
+}
+
+export function sealBackup(bundle: unknown, exportedAt: string): SealedBackup {
+  const { key, keyId } = deriveKey();
+  const iv = crypto.randomBytes(IV_BYTES);
+  const header = {
+    format: SEALED_BACKUP_FORMAT,
+    version: SEALED_BACKUP_VERSION,
+    keyId,
+    exportedAt,
+  } as const;
+  const cipher = crypto.createCipheriv(ALGORITHM, key, iv);
+  cipher.setAAD(associatedData(header));
+  const compressed = zlib.gzipSync(Buffer.from(JSON.stringify(bundle)));
+  const ciphertext = Buffer.concat([cipher.update(compressed), cipher.final()]);
+  return {
+    ...header,
+    algorithm: 'A256GCM+gzip',
+    iv: iv.toString('base64'),
+    tag: cipher.getAuthTag().toString('base64'),
+    ciphertext: ciphertext.toString('base64'),
+  };
+}
+
+export function isSealedBackup(value: unknown): value is SealedBackup {
+  if (typeof value !== 'object' || value === null) {
+    return false;
+  }
+  const candidate = value as Record<string, unknown>;
+  return (
+    candidate.format === SEALED_BACKUP_FORMAT &&
+    typeof candidate.ciphertext === 'string'
+  );
+}
+
+/** The bundle inside a sealed backup; throws if the file was not made with this key or was changed. */
+export function openBackup(sealed: SealedBackup): unknown {
+  if (sealed.version !== SEALED_BACKUP_VERSION) {
+    throw new BadRequestException(
+      `Backup-Version ${String(sealed.version)} wird nicht unterstützt`,
+    );
+  }
+  const { key, keyId } = deriveKey();
+  if (sealed.keyId !== keyId) {
+    throw new BadRequestException(
+      'Backup wurde mit einem anderen Schlüssel erstellt (BACKUP_ENCRYPTION_KEY prüfen)',
+    );
+  }
+  let compressed: Buffer;
+  try {
+    const decipher = crypto.createDecipheriv(
+      ALGORITHM,
+      key,
+      Buffer.from(sealed.iv, 'base64'),
+    );
+    decipher.setAAD(associatedData(sealed));
+    decipher.setAuthTag(Buffer.from(sealed.tag, 'base64'));
+    compressed = Buffer.concat([
+      decipher.update(Buffer.from(sealed.ciphertext, 'base64')),
+      decipher.final(),
+    ]);
+  } catch {
+    throw new BadRequestException(
+      'Backup-Datei ist beschädigt oder wurde verändert',
+    );
+  }
+  let json: string;
+  try {
+    json = zlib
+      .gunzipSync(compressed, { maxOutputLength: MAX_PLAINTEXT_BYTES })
+      .toString('utf-8');
+  } catch {
+    throw new BadRequestException('Backup-Datei ist zu groß oder beschädigt');
+  }
+  return JSON.parse(json) as unknown;
+}

ApiCore-Backend/src/backup/backup-schedule-rules.spec.ts

@@ -0,0 +1,50 @@
+import { BadRequestException } from '@nestjs/common';
+import * as path from 'node:path';
+import {
+  assertBackupCron,
+  assertGuiBackupPath,
+  resolveGuiBackupPath,
+} from './backup-schedule-rules';
+
+describe('backup-schedule-rules', () => {
+  const originalRoot = process.env.BACKUP_ROOT;
+
+  beforeEach(() => {
+    process.env.BACKUP_ROOT = path.resolve('/data/backups');
+  });
+
+  afterAll(() => {
+    process.env.BACKUP_ROOT = originalRoot;
+  });
+
+  it('keeps a GUI path under the backup root', () => {
+    expect(resolveGuiBackupPath('nightly')).toBe(
+      path.resolve('/data/backups/nightly'),
+    );
+    expect(() => assertGuiBackupPath('nightly')).not.toThrow();
+  });
+
+  it('refuses a GUI path that leaves the backup root', () => {
+    expect(() => assertGuiBackupPath('../../app/public')).toThrow(
+      BadRequestException,
+    );
+    expect(() => assertGuiBackupPath('/etc')).toThrow(BadRequestException);
+    expect(() => assertGuiBackupPath('/data/backups-evil')).toThrow(
+      BadRequestException,
+    );
+  });
+
+  it('accepts a daily schedule', () => {
+    expect(() => assertBackupCron('0 3 * * *')).not.toThrow();
+  });
+
+  it('refuses a schedule that runs more than hourly or has seconds', () => {
+    expect(() => assertBackupCron('* * * * *')).toThrow(BadRequestException);
+    expect(() => assertBackupCron('*/10 * * * *')).toThrow(BadRequestException);
+    expect(() => assertBackupCron('* * * * * *')).toThrow(BadRequestException);
+  });
+
+  it('refuses an invalid expression', () => {
+    expect(() => assertBackupCron('every day')).toThrow(BadRequestException);
+  });
+});

ApiCore-Backend/src/backup/backup-schedule-rules.ts

@@ -0,0 +1,55 @@
+import { BadRequestException } from '@nestjs/common';
+import { CronTime, validateCronExpression } from 'cron';
+import * as path from 'node:path';
+
+/**
+ * Limits on what the admin UI may configure for automatic backups. The env
+ * variables (set by the operator) stay unrestricted; a GUI value is data a
+ * logged-in user typed, so it may neither write a full dump anywhere on the
+ * server's file system nor run an export every second.
+ */
+const MIN_INTERVAL_MS = 60 * 60 * 1000;
+const INTERVAL_SAMPLES = 48;
+
+/** Root every GUI-configured backup directory must stay under. */
+export function backupRoot(): string {
+  return path.resolve(process.env.BACKUP_ROOT ?? './backups');
+}
+
+/** The GUI path resolved under backupRoot(), or null if it would leave it. */
+export function resolveGuiBackupPath(value: string): string | null {
+  const root = backupRoot();
+  const resolved = path.resolve(root, value);
+  if (resolved !== root && !resolved.startsWith(root + path.sep)) {
+    return null;
+  }
+  return resolved;
+}
+
+export function assertGuiBackupPath(value: string): void {
+  if (resolveGuiBackupPath(value) === null) {
+    throw new BadRequestException(
+      `Backup-Pfad muss innerhalb von ${backupRoot()} liegen`,
+    );
+  }
+}
+
+/** A standard five-field cron expression that fires at most once an hour. */
+export function assertBackupCron(expression: string): void {
+  const fields = expression.trim().split(/\s+/);
+  if (fields.length !== 5 || !validateCronExpression(expression).valid) {
+    throw new BadRequestException(
+      'Zeitplan muss ein Cron-Ausdruck mit fünf Feldern sein, z. B. "0 3 * * *"',
+    );
+  }
+  const runs = new CronTime(expression)
+    .sendAt(INTERVAL_SAMPLES)
+    .map((run) => run.toMillis());
+  for (let i = 1; i < runs.length; i++) {
+    if (runs[i] - runs[i - 1] < MIN_INTERVAL_MS) {
+      throw new BadRequestException(
+        'Zeitplan darf höchstens einmal pro Stunde sichern',
+      );
+    }
+  }
+}

ApiCore-Backend/src/backup/backup-scheduler.service.ts

@@ -5,6 +5,10 @@ import * as fs from 'node:fs/promises';
 import * as path from 'node:path';
 import { BackupService } from './backup.service';
 import { BackupSettingsService } from './backup-settings.service';
+import {
+  assertBackupCron,
+  resolveGuiBackupPath,
+} from './backup-schedule-rules';
 
 const SCHEDULED_JOB_NAME = 'automatic-backup';
 const DEFAULT_CRON_SCHEDULE = '0 3 * * *';
@@ -68,7 +72,13 @@ export class BackupSchedulerService implements OnModuleInit {
     const gui = await this.backupSettingsService.get();
 
     return {
-      path: hasEnvPath ? (envPath as string) : (gui.storagePath ?? null),
+      // A GUI path counts only inside BACKUP_ROOT (a value stored before
+      // that rule existed and pointing elsewhere disables the schedule).
+      path: hasEnvPath
+        ? (envPath as string)
+        : gui.storagePath
+          ? resolveGuiBackupPath(gui.storagePath)
+          : null,
       cronSchedule: hasEnvCron
         ? (envCron as string)
         : (gui.cronSchedule ?? DEFAULT_CRON_SCHEDULE),
@@ -88,11 +98,22 @@ export class BackupSchedulerService implements OnModuleInit {
   // admin's schedule/path/retention change takes effect immediately without
   // a pod restart.
   async reload(): Promise<void> {
+    const settings = await this.effectiveSettings();
+    if (!settings.envOverrides.cronSchedule) {
+      try {
+        assertBackupCron(settings.cronSchedule);
+      } catch {
+        // Keep whatever is running instead of silently ending backups.
+        this.logger.error(
+          `Ungültiger Backup-Zeitplan "${settings.cronSchedule}" - bisheriger Zeitplan bleibt aktiv`,
+        );
+        return;
+      }
+    }
     if (this.schedulerRegistry.doesExist('cron', SCHEDULED_JOB_NAME)) {
       this.schedulerRegistry.deleteCronJob(SCHEDULED_JOB_NAME);
     }
 
-    const settings = await this.effectiveSettings();
     if (!settings.path) {
       this.logger.log(
         'Kein Backup-Pfad konfiguriert (weder Env noch GUI) - automatische Backups deaktiviert',
@@ -144,7 +165,7 @@ export class BackupSchedulerService implements OnModuleInit {
 
   // Manual trigger (e.g. "Jetzt sichern" button) - always runs, no
   // duplicate-tick guard, since a human explicitly asked for it.
-  async runNow(): Promise<{ filePath: string }> {
+  async runNow(): Promise<{ fileName: string }> {
     const settings = await this.effectiveSettings();
     if (!settings.path) {
       throw new Error(
@@ -153,7 +174,8 @@ export class BackupSchedulerService implements OnModuleInit {
     }
     const filePath = await this.writeBackup(settings.path);
     await this.pruneOldBackups(settings.path, settings.retentionCount);
-    return { filePath };
+    // Only the name: the server's directory layout stays on the server.
+    return { fileName: path.basename(filePath) };
   }
 
   private async runScheduled(directory: string): Promise<void> {
@@ -176,14 +198,15 @@ export class BackupSchedulerService implements OnModuleInit {
   }
 
   private async writeBackup(directory: string): Promise<string> {
-    const bundle = await this.backupService.exportAll();
-    await fs.mkdir(directory, { recursive: true });
-    const timestamp = bundle.exportedAt.replace(/[:.]/g, '-');
+    const sealed = await this.backupService.exportSealed();
+    await fs.mkdir(directory, { recursive: true, mode: 0o700 });
+    const timestamp = sealed.exportedAt.replace(/[:.]/g, '-');
     const filePath = path.join(
       directory,
       `${BACKUP_FILE_PREFIX}${timestamp}${BACKUP_FILE_SUFFIX}`,
     );
-    await fs.writeFile(filePath, JSON.stringify(bundle, null, 2));
+    // Owner-only: the file holds every account's credentials (encrypted).
+    await fs.writeFile(filePath, JSON.stringify(sealed), { mode: 0o600 });
     return filePath;
   }
 

ApiCore-Backend/src/backup/backup-settings.service.ts

@@ -3,6 +3,7 @@ import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
 import { BackupSettings } from '../../generated/prisma';
 import { UpdateBackupSettingsDto } from './dto/update-backup-settings.dto';
+import { assertBackupCron, assertGuiBackupPath } from './backup-schedule-rules';
 
 const SINGLETON_ID = 'singleton';
 
@@ -31,6 +32,12 @@ export class BackupSettingsService {
     dto: UpdateBackupSettingsDto,
     actingUserId: string,
   ): Promise<BackupSettings> {
+    if (dto.storagePath) {
+      assertGuiBackupPath(dto.storagePath);
+    }
+    if (dto.cronSchedule) {
+      assertBackupCron(dto.cronSchedule);
+    }
     const before = await this.get();
     const settings = await this.prisma.backupSettings.update({
       where: { id: SINGLETON_ID },

ApiCore-Backend/src/backup/backup.controller.ts

@@ -16,7 +16,9 @@ import { RequirePermission } from '../auth/decorators/require-permission.decorat
 import { CurrentUser } from '../auth/decorators/current-user.decorator';
 import type { AuthenticatedUser } from '../auth/types/authenticated-user';
 import { BackupSettings } from '../../generated/prisma';
-import { BackupBundle, BackupService } from './backup.service';
+import { BackupService } from './backup.service';
+import { ReauthService } from '../auth/reauth/reauth.service';
+import { BackupImportProofDto } from './dto/backup-import-proof.dto';
 import {
   BackupScheduleStatus,
   BackupSchedulerService,
@@ -38,6 +40,7 @@ export class BackupController {
     private readonly backupService: BackupService,
     private readonly backupSchedulerService: BackupSchedulerService,
     private readonly backupSettingsService: BackupSettingsService,
+    private readonly reauth: ReauthService,
   ) {}
 
   @RequirePermission('backup:export')
@@ -48,7 +51,7 @@ export class BackupController {
 
   @RequirePermission('backup:export')
   @Post('schedule/run-now')
-  runScheduleNow(): Promise<{ filePath: string }> {
+  runScheduleNow(): Promise<{ fileName: string }> {
     return this.backupSchedulerService.runNow();
   }
 
@@ -72,11 +75,12 @@ export class BackupController {
   @RequirePermission('backup:export')
   @Get('export')
   async export(@Res() res: Response): Promise<void> {
-    const bundle = await this.backupService.exportAll();
+    const sealed = await this.backupService.exportSealed();
     const filename = `apicore-backup-${new Date().toISOString().slice(0, 10)}.json`;
     res.setHeader('Content-Type', 'application/json; charset=utf-8');
     res.setHeader('Content-Disposition', `attachment; filename="${filename}"`);
-    res.send(JSON.stringify(bundle, null, 2));
+    res.setHeader('Cache-Control', 'no-store');
+    res.send(JSON.stringify(sealed));
   }
 
   @RequirePermission('backup:import')
@@ -99,17 +103,20 @@ export class BackupController {
   )
   async import(
     @UploadedFile() file: Express.Multer.File | undefined,
+    @Body() proof: BackupImportProofDto,
     @CurrentUser() actor: AuthenticatedUser,
   ) {
+    // Restoring overwrites every account: prove it is really you, now.
+    await this.reauth.verify(actor.id, proof);
     if (!file) {
       throw new BadRequestException('No file uploaded');
     }
-    let bundle: BackupBundle;
+    let parsed: unknown;
     try {
-      bundle = JSON.parse(file.buffer.toString('utf-8')) as BackupBundle;
+      parsed = JSON.parse(file.buffer.toString('utf-8'));
     } catch {
       throw new BadRequestException('Datei ist kein gültiges JSON');
     }
-    return this.backupService.importAll(bundle, actor.id);
+    return this.backupService.importFile(parsed, actor.id);
   }
 }

ApiCore-Backend/src/backup/backup.module.ts

@@ -1,10 +1,12 @@
 import { Module } from '@nestjs/common';
+import { ReauthModule } from '../auth/reauth/reauth.module';
 import { BackupController } from './backup.controller';
 import { BackupService } from './backup.service';
 import { BackupSchedulerService } from './backup-scheduler.service';
 import { BackupSettingsService } from './backup-settings.service';
 
 @Module({
+  imports: [ReauthModule],
   controllers: [BackupController],
   providers: [BackupService, BackupSchedulerService, BackupSettingsService],
 })

ApiCore-Backend/src/backup/backup.service.spec.ts

@@ -2,6 +2,7 @@ import { BadRequestException } from '@nestjs/common';
 import { BackupService } from './backup.service';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
+import { PermissionResolverService } from '../auth/permissions/permission-resolver.service';
 
 jest.mock('node:fs/promises', () => ({
   readFile: jest.fn(),
@@ -24,6 +25,7 @@ const BUSINESS_ENTITY_KEYS = [
   'task',
   'varroaMeasurement',
   'swarmControlCheck',
+  'winterCheck',
   'treatment',
   'feeding',
   'harvest',
@@ -68,6 +70,8 @@ describe('BackupService', () => {
     user: { upsert: jest.Mock; findMany: jest.Mock };
   };
   let auditLog: { record: jest.Mock };
+  let permissionResolver: { invalidateAll: jest.Mock };
+  const TRUSTED = { trusted: true };
 
   beforeEach(() => {
     jest.clearAllMocks();
@@ -91,6 +95,9 @@ describe('BackupService', () => {
       findUnique: jest.fn().mockResolvedValue({ id: 'permission-1' }),
     };
     tx.user.findMany = jest.fn().mockResolvedValue([{ id: 'known-user' }]);
+    (tx.role as unknown as { findMany: jest.Mock }).findMany = jest
+      .fn()
+      .mockResolvedValue([]);
 
     prisma = {
       user: {
@@ -113,9 +120,11 @@ describe('BackupService', () => {
 
     auditLog = { record: jest.fn().mockResolvedValue(undefined) };
 
+    permissionResolver = { invalidateAll: jest.fn() };
     service = new BackupService(
       prisma as unknown as PrismaService,
       auditLog as unknown as AuditLogService,
+      permissionResolver as unknown as PermissionResolverService,
     );
   });
 
@@ -197,7 +206,7 @@ describe('BackupService', () => {
   describe('importAll', () => {
     it('rejects a bundle with no data object', async () => {
       await expect(
-        service.importAll({ version: 2 } as never, 'admin-1'),
+        service.importAll({ version: 2 } as never, 'admin-1', TRUSTED),
       ).rejects.toBeInstanceOf(BadRequestException);
       expect(prisma.$transaction).not.toHaveBeenCalled();
     });
@@ -210,6 +219,7 @@ describe('BackupService', () => {
           data: { role: [{ id: 'source-id', key: 'ADMIN', name: 'Admin' }] },
         },
         'admin-1',
+        TRUSTED,
       );
 
       const [[call]] = tx.role.upsert.mock.calls as [
@@ -232,6 +242,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       const [[call]] = tx.user.upsert.mock.calls as [
@@ -251,6 +262,7 @@ describe('BackupService', () => {
             },
           },
           'admin-1',
+          TRUSTED,
         ),
       ).rejects.toBeInstanceOf(BadRequestException);
     });
@@ -274,6 +286,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       expect(tx.rolePermission.upsert).toHaveBeenCalledTimes(1);
@@ -292,6 +305,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       expect(tx.queen.upsert).toHaveBeenCalledTimes(2);
@@ -325,6 +339,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       const [[call]] = tx.inspection.upsert.mock.calls as [
@@ -351,6 +366,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       const [[call]] = tx.inspection.upsert.mock.calls as [
@@ -371,6 +387,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       const [[call]] = tx.stockMovement.upsert.mock.calls as [
@@ -395,6 +412,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       const [[call]] = tx.automationRule.upsert.mock.calls as [
@@ -421,14 +439,14 @@ describe('BackupService', () => {
             document: [
               {
                 id: 'doc-1',
-                entityType: 'Colony',
+                entityType: 'COLONY',
                 mimeType: 'application/pdf',
                 uploadedByUserId: 'known-user',
-                contentBase64: Buffer.from('hello').toString('base64'),
+                contentBase64: Buffer.from('%PDF-1.4 hello').toString('base64'),
               },
               {
                 id: 'doc-2',
-                entityType: 'Colony',
+                entityType: 'COLONY',
                 mimeType: 'application/pdf',
                 uploadedByUserId: null,
                 contentBase64: null,
@@ -437,6 +455,7 @@ describe('BackupService', () => {
           },
         },
         'admin-1',
+        TRUSTED,
       );
 
       expect(fs.writeFile).toHaveBeenCalledTimes(1);
@@ -456,6 +475,7 @@ describe('BackupService', () => {
           data: { apiary: [{ id: 'apiary-1', name: 'Stand Wald' }] },
         },
         'admin-1',
+        TRUSTED,
       );
 
       expect(auditLog.record).toHaveBeenCalledWith(
@@ -463,9 +483,111 @@ describe('BackupService', () => {
           entityType: 'Backup',
           action: 'CREATE',
           userId: 'admin-1',
-          afterData: expect.objectContaining({ apiary: 1 }) as unknown,
+          afterData: expect.objectContaining({
+            imported: expect.objectContaining({ apiary: 1 }) as unknown,
+          }) as unknown,
         }),
       );
+      expect(permissionResolver.invalidateAll).toHaveBeenCalled();
+    });
+
+    it('refuses a document whose entityType would leave the storage root', async () => {
+      await expect(
+        service.importAll(
+          {
+            version: 2,
+            exportedAt: '2026-01-01T00:00:00.000Z',
+            data: {
+              document: [
+                {
+                  id: 'doc-evil',
+                  entityType: '../../app/dist',
+                  mimeType: 'application/pdf',
+                  contentBase64: Buffer.from('%PDF-1.4').toString('base64'),
+                },
+              ],
+            },
+          },
+          'admin-1',
+          TRUSTED,
+        ),
+      ).rejects.toBeInstanceOf(BadRequestException);
+      expect(fs.mkdir).not.toHaveBeenCalled();
+      expect(fs.writeFile).not.toHaveBeenCalled();
+    });
+
+    it('refuses a document whose bytes do not match its declared type', async () => {
+      await expect(
+        service.importAll(
+          {
+            version: 2,
+            exportedAt: '2026-01-01T00:00:00.000Z',
+            data: {
+              document: [
+                {
+                  id: 'doc-html',
+                  entityType: 'COLONY',
+                  mimeType: 'application/pdf',
+                  contentBase64: Buffer.from('<script>').toString('base64'),
+                },
+              ],
+            },
+          },
+          'admin-1',
+          TRUSTED,
+        ),
+      ).rejects.toBeInstanceOf(BadRequestException);
+      expect(fs.writeFile).not.toHaveBeenCalled();
+    });
+
+    it('never rewrites audit entries that already exist', async () => {
+      await service.importAll(
+        {
+          version: 2,
+          exportedAt: '2026-01-01T00:00:00.000Z',
+          data: { auditLog: [{ id: 'audit-1', action: 'LOGIN' }] },
+        },
+        'admin-1',
+        TRUSTED,
+      );
+      const [[call]] = tx.auditLog.upsert.mock.calls as [
+        [{ update: Record<string, unknown> }],
+      ];
+      expect(call.update).toEqual({});
+    });
+
+    it('takes no users, roles, webhooks or audit entries from an unsealed file', async () => {
+      const summary = await service.importAll(
+        {
+          version: 2,
+          exportedAt: '2026-01-01T00:00:00.000Z',
+          data: {
+            role: [{ key: 'ADMIN', name: 'Admin' }],
+            user: [
+              {
+                id: 'admin-victim',
+                email: '[email protected]',
+                passwordHash: 'attacker-hash',
+                roleKey: 'ADMIN',
+              },
+            ],
+            webhookSubscription: [{ id: 'hook-1', url: 'https://evil' }],
+            auditLog: [{ id: 'audit-1' }],
+            apiary: [{ id: 'apiary-1', name: 'Stand Wald' }],
+          },
+        },
+        'admin-1',
+        { trusted: false },
+      );
+
+      expect(tx.role.upsert).not.toHaveBeenCalled();
+      expect(tx.user.upsert).not.toHaveBeenCalled();
+      expect(tx.webhookSubscription.upsert).not.toHaveBeenCalled();
+      expect(tx.auditLog.upsert).not.toHaveBeenCalled();
+      expect(tx.apiary.upsert).toHaveBeenCalledTimes(1);
+      expect(summary.skipped).toEqual(
+        expect.arrayContaining(['role', 'user', 'webhookSubscription']),
+      );
     });
   });
 });

ApiCore-Backend/src/backup/backup.service.ts

@@ -4,7 +4,19 @@ import * as fs from 'node:fs/promises';
 import * as path from 'node:path';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
-import { ALLOWED_DOCUMENT_MIME_TYPES } from '../documents/document-mime-types';
+import {
+  ALLOWED_DOCUMENT_MIME_TYPES,
+  isAllowedDocumentMimeType,
+} from '../documents/document-mime-types';
+import { matchesFileSignature } from '../common/file-signature';
+import { PermissionResolverService } from '../auth/permissions/permission-resolver.service';
+import { DocumentEntityType } from '../../generated/prisma';
+import {
+  SealedBackup,
+  isSealedBackup,
+  openBackup,
+  sealBackup,
+} from './backup-crypto';
 
 const BACKUP_VERSION = 2;
 const IMPORT_TRANSACTION_TIMEOUT_MS = 10 * 60 * 1000;
@@ -17,8 +29,28 @@ export interface BackupBundle {
 
 export interface BackupImportSummary {
   imported: Record<string, number>;
+  /**
+   * Tables left out because the file was an old, unsealed (v2) backup: its
+   * contents cannot be proven to come from ApiCore, so nothing that grants
+   * access (users, roles, webhooks) or rewrites history (audit log) is
+   * taken from it.
+   */
+  skipped: string[];
 }
 
+// What an unsealed file may never write - see BackupImportSummary.skipped.
+const TRUSTED_ONLY_TABLES = [
+  'role',
+  'user',
+  'rolePermission',
+  'webhookSubscription',
+  'auditLog',
+] as const;
+
+const DOCUMENT_ENTITY_TYPES = new Set<string>(
+  Object.values(DocumentEntityType),
+);
+
 // Excluded on purpose:
 // - Permission: code-derived, re-synced from the catalog on every boot -
 //   including it would just fight that sync. RolePermission references
@@ -55,8 +87,33 @@ export class BackupService {
   constructor(
     private readonly prisma: PrismaService,
     private readonly auditLog: AuditLogService,
+    private readonly permissionResolver: PermissionResolverService,
   ) {}
 
+  /** The export as it leaves the server: encrypted and tamper-evident. */
+  async exportSealed(): Promise<SealedBackup> {
+    const bundle = await this.exportAll();
+    return sealBackup(bundle, bundle.exportedAt);
+  }
+
+  /**
+   * Restores an uploaded file. A sealed backup is restored completely; an
+   * old unsealed one only with its business data (see TRUSTED_ONLY_TABLES).
+   */
+  async importFile(
+    parsed: unknown,
+    actingUserId: string,
+  ): Promise<BackupImportSummary> {
+    if (isSealedBackup(parsed)) {
+      return this.importAll(openBackup(parsed) as BackupBundle, actingUserId, {
+        trusted: true,
+      });
+    }
+    return this.importAll(parsed as BackupBundle, actingUserId, {
+      trusted: false,
+    });
+  }
+
   async exportAll(): Promise<BackupBundle> {
     const data: Record<string, unknown[]> = {};
 
@@ -93,6 +150,7 @@ export class BackupService {
     data.task = await this.prisma.task.findMany();
     data.varroaMeasurement = await this.prisma.varroaMeasurement.findMany();
     data.swarmControlCheck = await this.prisma.swarmControlCheck.findMany();
+    data.winterCheck = await this.prisma.winterCheck.findMany();
     data.treatment = await this.prisma.treatment.findMany();
     data.feeding = await this.prisma.feeding.findMany();
     data.harvest = await this.prisma.harvest.findMany();
@@ -144,6 +202,7 @@ export class BackupService {
   async importAll(
     bundle: BackupBundle,
     actingUserId: string,
+    { trusted }: { trusted: boolean },
   ): Promise<BackupImportSummary> {
     if (
       typeof bundle !== 'object' ||
@@ -154,7 +213,18 @@ export class BackupService {
       throw new BadRequestException('Invalid backup file');
     }
 
+    const isTrustedOnly = (key: string): boolean =>
+      (TRUSTED_ONLY_TABLES as readonly string[]).includes(key);
+    const skipped = trusted
+      ? []
+      : TRUSTED_ONLY_TABLES.filter((key) => {
+          const value = bundle.data[key];
+          return Array.isArray(value) && value.length > 0;
+        });
     const rowsOf = (key: string): Row[] => {
+      if (!trusted && isTrustedOnly(key)) {
+        return [];
+      }
       const value = bundle.data[key];
       return Array.isArray(value) ? (value as Row[]) : [];
     };
@@ -164,6 +234,13 @@ export class BackupService {
     await this.prisma.$transaction(
       async (tx) => {
         const roleKeyToId = new Map<string, string>();
+        // Roles already in this database resolve too - an unsealed file
+        // brings none of its own.
+        for (const role of await tx.role.findMany({
+          select: { id: true, key: true },
+        })) {
+          roleKeyToId.set(role.key, role.id);
+        }
         for (const row of rowsOf('role')) {
           const withoutId: Row = { ...row };
           delete withoutId.id;
@@ -430,6 +507,21 @@ export class BackupService {
         }
         imported.swarmControlCheck = rowsOf('swarmControlCheck').length;
 
+        for (const row of rowsOf('winterCheck')) {
+          await tx.winterCheck.upsert({
+            where: { id: row.id as string },
+            create: {
+              ...row,
+              userId: resolveUserId(asString(row, 'userId')),
+            } as never,
+            update: {
+              ...row,
+              userId: resolveUserId(asString(row, 'userId')),
+            } as never,
+          });
+        }
+        imported.winterCheck = rowsOf('winterCheck').length;
+
         for (const row of rowsOf('treatment')) {
           await tx.treatment.upsert({
             where: { id: row.id as string },
@@ -677,13 +769,30 @@ export class BackupService {
           if (!contentBase64) {
             continue;
           }
-          const buffer = Buffer.from(contentBase64, 'base64');
-          const extension =
-            ALLOWED_DOCUMENT_MIME_TYPES[row.mimeType as string] ?? '';
-          const directory = path.join(
-            documentsStorageRoot(),
-            (row.entityType as string).toLowerCase(),
+          const entityType = asString(row, 'entityType');
+          const mimeType = asString(row, 'mimeType');
+          if (
+            !entityType ||
+            !DOCUMENT_ENTITY_TYPES.has(entityType) ||
+            !mimeType ||
+            !isAllowedDocumentMimeType(mimeType)
+          ) {
+            throw new BadRequestException(
+              `Dokument ${String(row.id)} hat einen unzulässigen Typ`,
             );
+          }
+          const buffer = Buffer.from(contentBase64, 'base64');
+          if (!matchesFileSignature(buffer, mimeType)) {
+            throw new BadRequestException(
+              `Dokument ${String(row.id)}: Inhalt passt nicht zum Dateityp`,
+            );
+          }
+          const extension = ALLOWED_DOCUMENT_MIME_TYPES[mimeType];
+          const storageRoot = path.resolve(documentsStorageRoot());
+          const directory = path.join(storageRoot, entityType.toLowerCase());
+          if (!directory.startsWith(storageRoot + path.sep)) {
+            throw new BadRequestException('Unzulässiger Speicherpfad');
+          }
           await fs.mkdir(directory, { recursive: true });
           const storagePath = path.join(
             directory,
@@ -723,6 +832,7 @@ export class BackupService {
         }
         imported.notification = rowsOf('notification').length;
 
+        // Append-only: entries already here are never rewritten by a file.
         for (const row of rowsOf('auditLog')) {
           await tx.auditLog.upsert({
             where: { id: row.id as string },
@@ -730,10 +840,7 @@ export class BackupService {
               ...row,
               userId: resolveOptionalUserId(asString(row, 'userId')),
             } as never,
-            update: {
-              ...row,
-              userId: resolveOptionalUserId(asString(row, 'userId')),
-            } as never,
+            update: {},
           });
         }
         imported.auditLog = rowsOf('auditLog').length;
@@ -741,14 +848,17 @@ export class BackupService {
       { timeout: IMPORT_TRANSACTION_TIMEOUT_MS },
     );
 
+    // Users, roles and grants may have changed underneath every cache.
+    this.permissionResolver.invalidateAll();
+
     await this.auditLog.record({
       entityType: 'Backup',
       entityId: 'import',
       action: 'CREATE',
       userId: actingUserId,
-      afterData: imported,
+      afterData: { imported, skipped, sealed: trusted },
     });
 
-    return { imported };
+    return { imported, skipped };
   }
 }

ApiCore-Backend/src/backup/dto/backup-import-proof.dto.ts

@@ -0,0 +1,16 @@
+import { ApiPropertyOptional } from '@nestjs/swagger';
+import { IsOptional, IsString, Matches, MaxLength } from 'class-validator';
+
+/** Step-up proof sent with a backup upload (multipart fields). */
+export class BackupImportProofDto {
+  @ApiPropertyOptional({ description: 'Aktuelles Passwort' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(200)
+  password?: string;
+
+  @ApiPropertyOptional({ description: 'Aktueller TOTP-Code, falls MFA aktiv' })
+  @IsOptional()
+  @Matches(/^\d{6}$/)
+  mfaCode?: string;
+}

ApiCore-Backend/src/bottling/bottling.controller.ts

@@ -15,6 +15,7 @@ import type { AuthenticatedUser } from '../auth/types/authenticated-user';
 import { CreateBottlingBatchDto } from './dto/create-bottling-batch.dto';
 import { UpdateBottlingBatchDto } from './dto/update-bottling-batch.dto';
 import { BottlingService } from './bottling.service';
+import { Idempotent } from '../common/idempotency/idempotent.decorator';
 
 @ApiTags('bottling')
 @ApiBearerAuth()
@@ -35,6 +36,7 @@ export class BottlingController {
   }
 
   @RequirePermission('bottling:create')
+  @Idempotent()
   @Post()
   create(
     @Body() dto: CreateBottlingBatchDto,

ApiCore-Backend/src/bottling/bottling.service.spec.ts

@@ -5,6 +5,18 @@ import { AuditLogService } from '../audit/audit-log.service';
 import { WebhooksService } from '../webhooks/webhooks.service';
 import { AutomationService } from '../automation/automation.service';
 
+type AmountChange = number | { increment?: number; decrement?: number };
+
+function applyAmountChange(
+  current: number | null,
+  change: AmountChange | undefined,
+): number | null {
+  if (change === undefined) return current;
+  if (typeof change === 'number') return change;
+  if (current === null) return null;
+  return current + (change.increment ?? 0) - (change.decrement ?? 0);
+}
+
 describe('BottlingService', () => {
   let service: BottlingService;
   let prisma: {
@@ -21,18 +33,71 @@ describe('BottlingService', () => {
   let auditLog: { record: jest.Mock };
   let tx: {
     bottlingBatch: { create: jest.Mock; update: jest.Mock; delete: jest.Mock };
-    honeyBatch: { update: jest.Mock };
+    honeyBatch: {
+      findUnique: jest.Mock;
+      update: jest.Mock;
+      updateMany: jest.Mock;
+    };
   };
   let webhooks: { dispatch: jest.Mock };
+  // Honey batch rows as the transaction sees them - the tests assert the
+  // resulting amounts instead of the exact sequence of UPDATE statements.
+  let honeyBatches: Map<string, { amount: number | null; status?: string }>;
 
   beforeEach(() => {
+    honeyBatches = new Map();
     tx = {
       bottlingBatch: {
         create: jest.fn(),
         update: jest.fn(),
         delete: jest.fn(),
       },
-      honeyBatch: { update: jest.fn() },
+      honeyBatch: {
+        findUnique: jest.fn(({ where }: { where: { id: string } }) => {
+          const row = honeyBatches.get(where.id);
+          return Promise.resolve(row ? { id: where.id, ...row } : null);
+        }),
+        update: jest.fn(
+          ({
+            where,
+            data,
+          }: {
+            where: { id: string };
+            data: { amount?: AmountChange; status?: string };
+          }) => {
+            const row = honeyBatches.get(where.id) ?? { amount: null };
+            honeyBatches.set(where.id, {
+              amount: applyAmountChange(row.amount, data.amount),
+              status: data.status ?? row.status,
+            });
+            return Promise.resolve({});
+          },
+        ),
+        updateMany: jest.fn(
+          ({
+            where,
+            data,
+          }: {
+            where: { id: string; amount?: { gte?: number } };
+            data: { amount: AmountChange; status?: string };
+          }) => {
+            const row = honeyBatches.get(where.id);
+            const minimum = where.amount?.gte;
+            if (
+              !row ||
+              row.amount === null ||
+              (minimum !== undefined && row.amount < minimum)
+            ) {
+              return Promise.resolve({ count: 0 });
+            }
+            honeyBatches.set(where.id, {
+              amount: applyAmountChange(row.amount, data.amount),
+              status: data.status ?? row.status,
+            });
+            return Promise.resolve({ count: 1 });
+          },
+        ),
+      },
     };
     prisma = {
       honeyBatch: { findUnique: jest.fn(), update: jest.fn() },
@@ -101,6 +166,7 @@ describe('BottlingService', () => {
       id: 'h1',
       amount: 25,
     });
+    honeyBatches.set('h1', { amount: 25 });
     tx.bottlingBatch.create.mockResolvedValueOnce({
       id: 'b1',
       totalAmount: 25,
@@ -123,10 +189,7 @@ describe('BottlingService', () => {
     );
 
     expect(result).toEqual({ id: 'b1', totalAmount: 25 });
-    expect(tx.honeyBatch.update).toHaveBeenCalledWith({
-      where: { id: 'h1' },
-      data: { amount: 0, status: 'BOTTLED' },
-    });
+    expect(honeyBatches.get('h1')).toEqual({ amount: 0, status: 'BOTTLED' });
     expect(auditLog.record).toHaveBeenCalledWith(
       expect.objectContaining({
         entityType: 'BottlingBatch',
@@ -135,6 +198,32 @@ describe('BottlingService', () => {
     );
   });
 
+  it('refuses a bottling when the stored amount shrank after the first check', async () => {
+    // The pre-check saw 25 kg, but a concurrent bottling already took most
+    // of it - the conditional booking inside the transaction must catch that.
+    prisma.honeyBatch.findUnique.mockResolvedValueOnce({
+      id: 'h1',
+      amount: 25,
+    });
+    honeyBatches.set('h1', { amount: 3 });
+
+    await expect(
+      service.create(
+        {
+          honeyBatchId: 'h1',
+          date: '2026-01-01',
+          jarSize: 500,
+          jarCount: 20,
+          bestBeforeDate: '2027-01-01',
+          lotNumber: 'L-9',
+        },
+        'user-1',
+      ),
+    ).rejects.toBeInstanceOf(BadRequestException);
+    expect(tx.bottlingBatch.create).not.toHaveBeenCalled();
+    expect(honeyBatches.get('h1')?.amount).toBe(3);
+  });
+
   it('update writes an audit log entry with before and after data', async () => {
     const before = {
       id: 'b1',
@@ -209,6 +298,7 @@ describe('BottlingService', () => {
     prisma.bottlingBatch.findUnique
       .mockResolvedValueOnce(before)
       .mockResolvedValueOnce({ ...before, jarCount: 10, totalAmount: 5 });
+    honeyBatches.set('h1', { amount: 0 });
 
     await service.update('b1', { jarCount: 10 }, 'user-1');
 
@@ -217,10 +307,7 @@ describe('BottlingService', () => {
     ];
     expect(updateArgs[0].data.jarCount).toBe(10);
     expect(updateArgs[0].data.totalAmount).toBe(5);
-    expect(tx.honeyBatch.update).toHaveBeenCalledWith({
-      where: { id: 'h1' },
-      data: { amount: 5 },
-    });
+    expect(honeyBatches.get('h1')?.amount).toBe(5);
   });
 
   it('rejects a corrected amount that exceeds the honey batch capacity', async () => {
@@ -251,17 +338,13 @@ describe('BottlingService', () => {
       .mockResolvedValueOnce(before)
       .mockResolvedValueOnce({ ...before, honeyBatchId: 'h2' });
     prisma.honeyBatch.findUnique.mockResolvedValueOnce({ id: 'h2', amount: 8 });
+    honeyBatches.set('h1', { amount: 2 });
+    honeyBatches.set('h2', { amount: 8 });
 
     await service.update('b1', { honeyBatchId: 'h2' }, 'user-1');
 
-    expect(tx.honeyBatch.update).toHaveBeenCalledWith({
-      where: { id: 'h1' },
-      data: { amount: 7 },
-    });
-    expect(tx.honeyBatch.update).toHaveBeenCalledWith({
-      where: { id: 'h2' },
-      data: { amount: 3, status: 'BOTTLED' },
-    });
+    expect(honeyBatches.get('h1')?.amount).toBe(7);
+    expect(honeyBatches.get('h2')).toEqual({ amount: 3, status: 'BOTTLED' });
   });
 
   it('remove gives the amount back and records a DELETE audit entry', async () => {
@@ -272,6 +355,7 @@ describe('BottlingService', () => {
       totalAmount: 5,
     };
     prisma.bottlingBatch.findUnique.mockResolvedValueOnce(before);
+    honeyBatches.set('h1', { amount: 2 });
 
     const result = await service.remove('b1', 'user-1');
 
@@ -279,10 +363,7 @@ describe('BottlingService', () => {
     expect(tx.bottlingBatch.delete).toHaveBeenCalledWith({
       where: { id: 'b1' },
     });
-    expect(tx.honeyBatch.update).toHaveBeenCalledWith({
-      where: { id: 'h1' },
-      data: { amount: 7 },
-    });
+    expect(honeyBatches.get('h1')?.amount).toBe(7);
     expect(auditLog.record).toHaveBeenCalledWith(
       expect.objectContaining({
         entityType: 'BottlingBatch',

ApiCore-Backend/src/bottling/bottling.service.ts

@@ -7,7 +7,7 @@ import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
 import { WebhooksService } from '../webhooks/webhooks.service';
 import { AutomationService } from '../automation/automation.service';
-import { BottlingBatch } from '../../generated/prisma';
+import { BottlingBatch, Prisma } from '../../generated/prisma';
 import { CreateBottlingBatchDto } from './dto/create-bottling-batch.dto';
 import { UpdateBottlingBatchDto } from './dto/update-bottling-batch.dto';
 
@@ -29,6 +29,74 @@ function roundKg(amount: number): number {
   return Math.round(amount * 1000) / 1000;
 }
 
+const INSUFFICIENT_AMOUNT_MESSAGE =
+  'Abfüllmenge übersteigt die verfügbare Menge der Honigcharge';
+
+type Tx = Prisma.TransactionClient;
+
+/**
+ * Deducts `amount` kg from a honey batch in one conditional UPDATE, so the
+ * database - not a value read earlier - decides whether enough is left.
+ * A batch without a recorded amount (null) is not tracked and stays null.
+ */
+async function takeFromHoneyBatch(
+  tx: Tx,
+  honeyBatchId: string,
+  amount: number,
+): Promise<void> {
+  const current = await tx.honeyBatch.findUnique({
+    where: { id: honeyBatchId },
+    select: { amount: true },
+  });
+  if (!current) {
+    throw new NotFoundException('Honey batch not found');
+  }
+  if (current.amount === null) {
+    await tx.honeyBatch.update({
+      where: { id: honeyBatchId },
+      data: { status: 'BOTTLED' },
+    });
+    return;
+  }
+  // Tolerance of half a gram absorbs float noise from earlier writes.
+  const booked = await tx.honeyBatch.updateMany({
+    where: { id: honeyBatchId, amount: { gte: amount - 0.0005 } },
+    data: { amount: { decrement: amount }, status: 'BOTTLED' },
+  });
+  if (booked.count === 0) {
+    throw new BadRequestException(INSUFFICIENT_AMOUNT_MESSAGE);
+  }
+  await normalizeAmount(tx, honeyBatchId);
+}
+
+async function giveBackToHoneyBatch(
+  tx: Tx,
+  honeyBatchId: string,
+  amount: number,
+): Promise<void> {
+  await tx.honeyBatch.updateMany({
+    where: { id: honeyBatchId, amount: { not: null } },
+    data: { amount: { increment: amount } },
+  });
+  await normalizeAmount(tx, honeyBatchId);
+}
+
+/** Keeps gram precision and clamps float noise below zero to exactly 0. */
+async function normalizeAmount(tx: Tx, honeyBatchId: string): Promise<void> {
+  const row = await tx.honeyBatch.findUnique({
+    where: { id: honeyBatchId },
+    select: { amount: true },
+  });
+  if (row?.amount == null) return;
+  const normalized = Math.max(0, roundKg(row.amount));
+  if (normalized !== row.amount) {
+    await tx.honeyBatch.update({
+      where: { id: honeyBatchId },
+      data: { amount: normalized },
+    });
+  }
+}
+
 @Injectable()
 export class BottlingService {
   constructor(
@@ -73,11 +141,9 @@ export class BottlingService {
       }
     }
 
-    const totalAmount = (dto.jarSize * dto.jarCount) / 1000;
+    const totalAmount = roundKg((dto.jarSize * dto.jarCount) / 1000);
     if (honeyBatch.amount !== null && totalAmount > honeyBatch.amount) {
-      throw new BadRequestException(
-        'Abfüllmenge übersteigt die verfügbare Menge der Honigcharge',
-      );
+      throw new BadRequestException(INSUFFICIENT_AMOUNT_MESSAGE);
     }
 
     const lotNumber =
@@ -91,7 +157,12 @@ export class BottlingService {
 
     const bottlingBatch: BottlingBatch = await this.prisma.$transaction(
       async (tx) => {
-        const created = await tx.bottlingBatch.create({
+        // Booked against the stored amount inside the transaction, never
+        // against the value read above: two bottlings submitted at the same
+        // time (double tap, two devices) must not both pass the check and
+        // overwrite each other's deduction.
+        await takeFromHoneyBatch(tx, dto.honeyBatchId, totalAmount);
+        return tx.bottlingBatch.create({
           data: {
             honeyBatchId: dto.honeyBatchId,
             productId: dto.productId,
@@ -104,17 +175,6 @@ export class BottlingService {
             userId: actingUserId,
           },
         });
-        await tx.honeyBatch.update({
-          where: { id: dto.honeyBatchId },
-          data: {
-            amount:
-              honeyBatch.amount !== null
-                ? honeyBatch.amount - totalAmount
-                : null,
-            status: 'BOTTLED',
-          },
-        });
-        return created;
       },
     );
 
@@ -163,8 +223,8 @@ export class BottlingService {
       throw new NotFoundException('Honey batch not found');
     }
 
-    // Capacity on the target batch, with this bottling batch's current amount
-    // released first when it already sits on that same batch.
+    // Early, friendly check against the amounts read above. The booking
+    // itself happens atomically inside the transaction below.
     const availableOnTarget =
       targetHoneyBatch.amount === null
         ? null
@@ -173,14 +233,26 @@ export class BottlingService {
               (movedToOtherHoneyBatch ? 0 : before.totalAmount),
           );
     if (availableOnTarget !== null && totalAmount > availableOnTarget) {
-      throw new BadRequestException(
-        'Abfüllmenge übersteigt die verfügbare Menge der Honigcharge',
-      );
+      throw new BadRequestException(INSUFFICIENT_AMOUNT_MESSAGE);
     }
 
     // A duplicate lotNumber surfaces as Prisma P2002 and is turned into a
     // 409 with a field-specific message by AllExceptionsFilter.
     await this.prisma.$transaction(async (tx) => {
+      const amountChanged =
+        movedToOtherHoneyBatch || totalAmount !== before.totalAmount;
+      if (amountChanged) {
+        // Give the previous amount back first, then take the corrected one -
+        // a correction never double-charges the source batch.
+        await giveBackToHoneyBatch(tx, before.honeyBatchId, before.totalAmount);
+        await takeFromHoneyBatch(tx, honeyBatchId, totalAmount);
+      }
+      if (movedToOtherHoneyBatch) {
+        await tx.honeyBatch.update({
+          where: { id: honeyBatchId },
+          data: { status: 'BOTTLED' },
+        });
+      }
       await tx.bottlingBatch.update({
         where: { id },
         data: {
@@ -196,38 +268,6 @@ export class BottlingService {
           lotNumber: dto.lotNumber,
         },
       });
-
-      if (movedToOtherHoneyBatch) {
-        await tx.honeyBatch.update({
-          where: { id: before.honeyBatchId },
-          data: {
-            amount:
-              before.honeyBatch.amount === null
-                ? null
-                : roundKg(before.honeyBatch.amount + before.totalAmount),
-          },
-        });
-        await tx.honeyBatch.update({
-          where: { id: honeyBatchId },
-          data: {
-            amount:
-              availableOnTarget === null
-                ? null
-                : roundKg(availableOnTarget - totalAmount),
-            status: 'BOTTLED',
-          },
-        });
-      } else if (totalAmount !== before.totalAmount) {
-        await tx.honeyBatch.update({
-          where: { id: honeyBatchId },
-          data: {
-            amount:
-              availableOnTarget === null
-                ? null
-                : roundKg(availableOnTarget - totalAmount),
-          },
-        });
-      }
     });
 
     const bottlingBatch = await this.findById(id);
@@ -257,14 +297,7 @@ export class BottlingService {
 
     await this.prisma.$transaction(async (tx) => {
       await tx.bottlingBatch.delete({ where: { id } });
-      if (before.honeyBatch.amount !== null) {
-        await tx.honeyBatch.update({
-          where: { id: before.honeyBatchId },
-          data: {
-            amount: roundKg(before.honeyBatch.amount + before.totalAmount),
-          },
-        });
-      }
+      await giveBackToHoneyBatch(tx, before.honeyBatchId, before.totalAmount);
     });
 
     await this.auditLog.record({

ApiCore-Backend/src/colonies/colonies.service.ts

@@ -1,4 +1,5 @@
 import {
+  BadRequestException,
   ConflictException,
   Injectable,
   NotFoundException,
@@ -13,6 +14,7 @@ import { UpdateColonyDto } from './dto/update-colony.dto';
 import { MoveColonyDto } from './dto/move-colony.dto';
 import { SplitColonyDto } from './dto/split-colony.dto';
 import { MergeColonyDto } from './dto/merge-colony.dto';
+import { isLivingColonyStatus } from './colony-status';
 
 export interface ColonyFilter {
   status?: ColonyStatus;
@@ -43,10 +45,13 @@ export class ColoniesService {
     return colony;
   }
 
+  // Only a colony that no longer exists (dissolved, sold, dead, merged) is
+  // locked. Weak, conspicuous or queenless colonies are still worked with -
+  // uniting a queenless colony with another is the textbook case for merge.
   private assertActive(colony: Colony): void {
-    if (colony.status !== 'ACTIVE') {
+    if (!isLivingColonyStatus(colony.status)) {
       throw new ConflictException(
-        `Das Volk ist nicht aktiv (Status: ${colony.status})`,
+        `Das Volk besteht nicht mehr (Status: ${colony.status})`,
       );
     }
   }
@@ -206,6 +211,16 @@ export class ColoniesService {
   ): Promise<Colony> {
     const survivor = await this.findById(id);
     this.assertActive(survivor);
+    if (dto.mergedColonyIds.includes(survivor.id)) {
+      throw new BadRequestException(
+        'Ein Volk kann nicht mit sich selbst vereinigt werden',
+      );
+    }
+    if (new Set(dto.mergedColonyIds).size !== dto.mergedColonyIds.length) {
+      throw new BadRequestException(
+        'Jedes Volk darf nur einmal zur Vereinigung ausgewählt werden',
+      );
+    }
     await this.prisma.$transaction(async (tx) => {
       for (const mergedColonyId of dto.mergedColonyIds) {
         const merged = await tx.colony.findUnique({
@@ -265,6 +280,9 @@ export class ColoniesService {
 
   async dissolve(id: string, actingUserId: string): Promise<Colony> {
     const before = await this.findById(id);
+    // Re-dissolving would overwrite deactivatedAt and the terminal status
+    // (e.g. MERGED -> DISSOLVED), losing when and how the colony really ended.
+    this.assertActive(before);
     const colony = await this.prisma.$transaction(async (tx) => {
       const updated = await tx.colony.update({
         where: { id },

ApiCore-Backend/src/colonies/colony-status.ts

@@ -0,0 +1,18 @@
+import { ColonyStatus } from '../../generated/prisma';
+
+/**
+ * Statuses after which a colony no longer exists as a living unit. The other
+ * statuses (ACTIVE, WEAK, CONSPICUOUS, QUEENLESS) describe a colony that is
+ * still in the apiary and can be worked with - a weak colony still gets moved,
+ * and a queenless one is exactly the colony a beekeeper unites with another.
+ */
+export const TERMINAL_COLONY_STATUSES: readonly ColonyStatus[] = [
+  'DISSOLVED',
+  'SOLD',
+  'DECEASED',
+  'MERGED',
+];
+
+export function isLivingColonyStatus(status: ColonyStatus): boolean {
+  return !TERMINAL_COLONY_STATUSES.includes(status);
+}

ApiCore-Backend/src/common/filters/all-exceptions.filter.ts

@@ -49,6 +49,30 @@ const FOREIGN_KEY_MESSAGE =
  * status and message they deserve. Anything not listed here stays a 500 with
  * a generic body, so no internal detail leaks.
  */
+/**
+ * Errors raised by Express middleware before Nest sees the request (body
+ * too large, malformed JSON, unsupported encoding) carry a 4xx `status`.
+ * They are client mistakes, not outages: answer with that status.
+ */
+function middlewareErrorResponse(
+  exception: unknown,
+): { status: number; message: string } | null {
+  if (typeof exception !== 'object' || exception === null) {
+    return null;
+  }
+  const candidate = exception as { status?: unknown; statusCode?: unknown };
+  const status = candidate.status ?? candidate.statusCode;
+  if (typeof status !== 'number' || status < 400 || status >= 500) {
+    return null;
+  }
+  const messages: Record<number, string> = {
+    400: 'Ungültige Anfrage',
+    413: 'Anfrage ist zu groß',
+    415: 'Format der Anfrage wird nicht unterstützt',
+  };
+  return { status, message: messages[status] ?? 'Ungültige Anfrage' };
+}
+
 function prismaErrorResponse(
   exception: unknown,
 ): { status: number; message: string } | null {
@@ -105,7 +129,8 @@ export class AllExceptionsFilter implements ExceptionFilter {
     const request = ctx.getRequest<Request>();
 
     const isHttpException = exception instanceof HttpException;
-    const prismaResponse = prismaErrorResponse(exception);
+    const prismaResponse =
+      prismaErrorResponse(exception) ?? middlewareErrorResponse(exception);
     const status = isHttpException
       ? exception.getStatus()
       : (prismaResponse?.status ?? HttpStatus.INTERNAL_SERVER_ERROR);
@@ -117,7 +142,8 @@ export class AllExceptionsFilter implements ExceptionFilter {
         };
     const message =
       exception instanceof Error ? exception.message : 'Unknown error';
-    const context = `${request.method} ${request.originalUrl} -> ${status}`;
+    // Path only - query strings can carry codes and personal data.
+    const context = `${request.method} ${request.baseUrl}${request.path} -> ${status}`;
     // Compared against the literal 500, not HttpStatus.INTERNAL_SERVER_ERROR:
     // eslint's no-unsafe-enum-comparison and TS's no-unnecessary-type-assertion
     // fight over any cast here, so a plain number sidesteps both cleanly.

ApiCore-Backend/src/common/idempotency/idempotency-cleanup.service.ts

@@ -0,0 +1,33 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { Cron, CronExpression } from '@nestjs/schedule';
+import { PrismaService } from '../../prisma/prisma.service';
+
+// Longer than any realistic offline stretch at the apiary: an entry queued
+// on the phone must still find its key when it finally syncs, otherwise the
+// repeat would create a duplicate after all.
+export const IDEMPOTENCY_RETENTION_DAYS = 90;
+
+@Injectable()
+export class IdempotencyCleanupService {
+  private readonly logger = new Logger(IdempotencyCleanupService.name);
+
+  constructor(private readonly prisma: PrismaService) {}
+
+  @Cron(CronExpression.EVERY_DAY_AT_4AM)
+  async removeExpired(now: Date = new Date()): Promise<number> {
+    const cutoff = new Date(
+      now.getTime() - IDEMPOTENCY_RETENTION_DAYS * 24 * 60 * 60 * 1000,
+    );
+    const { count } = await this.prisma.idempotencyRecord.deleteMany({
+      where: { createdAt: { lt: cutoff } },
+    });
+    if (count > 0) {
+      this.logger.log(`Removed ${count} expired idempotency record(s)`);
+    }
+    // Used one-time tokens only matter until the token itself expires.
+    await this.prisma.consumedToken.deleteMany({
+      where: { expiresAt: { lt: now } },
+    });
+    return count;
+  }
+}

ApiCore-Backend/src/common/idempotency/idempotency.interceptor.ts

@@ -0,0 +1,188 @@
+import {
+  BadRequestException,
+  CallHandler,
+  ConflictException,
+  ExecutionContext,
+  Injectable,
+  NestInterceptor,
+} from '@nestjs/common';
+import { Reflector } from '@nestjs/core';
+import type { Request, Response } from 'express';
+import { Observable, from, of, throwError } from 'rxjs';
+import { catchError, mergeMap } from 'rxjs/operators';
+import { PrismaService } from '../../prisma/prisma.service';
+import { Prisma } from '../../../generated/prisma';
+import type { AuthenticatedUser } from '../../auth/types/authenticated-user';
+import { IDEMPOTENT_KEY } from './idempotent.decorator';
+
+export const IDEMPOTENCY_HEADER = 'idempotency-key';
+
+// UUIDs and similar opaque tokens - long enough to be unguessable per user,
+// short enough to keep the unique index small. Anything else is a client bug.
+const KEY_PATTERN = /^[A-Za-z0-9_-]{16,128}$/;
+
+const ABANDONED_PENDING_MS = 5 * 60 * 1000;
+
+type RequestWithUser = Request & { user?: AuthenticatedUser };
+
+/**
+ * Makes a POST safe to repeat. A client that cannot tell whether its request
+ * arrived - the offline queue after a dropped connection, a retry after a
+ * timeout - sends the same `Idempotency-Key` again and gets the stored first
+ * response back instead of a second inspection, harvest or task.
+ *
+ * Flow per (user, key):
+ * - first request claims the key (PENDING row), runs the handler and stores
+ *   status + body (COMPLETED);
+ * - a repeat after completion replays the stored response;
+ * - a repeat while the first one still runs gets 409, the client retries later;
+ * - a failed handler releases the key, so a corrected retry is possible.
+ *
+ * Only handlers marked @Idempotent() take part (response bodies are stored,
+ * so endpoints returning secrets must never opt in). Requests without the
+ * header, or to other handlers, behave exactly as before.
+ */
+@Injectable()
+export class IdempotencyInterceptor implements NestInterceptor {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly reflector: Reflector,
+  ) {}
+
+  async intercept(
+    context: ExecutionContext,
+    next: CallHandler,
+  ): Promise<Observable<unknown>> {
+    const http = context.switchToHttp();
+    const request = http.getRequest<RequestWithUser>();
+    const rawKey = request.headers[IDEMPOTENCY_HEADER];
+    const userId = request.user?.id;
+    const optedIn = this.reflector.get<boolean | undefined>(
+      IDEMPOTENT_KEY,
+      context.getHandler(),
+    );
+    if (
+      !optedIn ||
+      request.method !== 'POST' ||
+      rawKey === undefined ||
+      !userId
+    ) {
+      return next.handle();
+    }
+    const key = Array.isArray(rawKey) ? rawKey[0] : rawKey;
+    if (!KEY_PATTERN.test(key)) {
+      throw new BadRequestException(
+        'Ungültiger Idempotency-Key (16–128 Zeichen, nur Buchstaben, Ziffern, "-" und "_")',
+      );
+    }
+    const scope = `${request.method} ${request.baseUrl}${request.path}`;
+
+    let claimed = await this.claim(userId, key, scope);
+    if (!claimed && (await this.releaseIfAbandoned(userId, key))) {
+      claimed = await this.claim(userId, key, scope);
+    }
+    if (!claimed) {
+      const existing = await this.prisma.idempotencyRecord.findUnique({
+        where: { userId_key: { userId, key } },
+      });
+      if (!existing) {
+        // Released between our failed insert and this read - the first
+        // attempt failed. Let the client retry instead of guessing.
+        throw new ConflictException(
+          'Diese Anfrage wurde gerade abgebrochen - bitte erneut senden',
+        );
+      }
+      if (existing.scope !== scope) {
+        throw new ConflictException(
+          'Dieser Idempotency-Key wurde bereits für eine andere Aktion verwendet',
+        );
+      }
+      if (existing.status !== 'COMPLETED') {
+        throw new ConflictException(
+          'Diese Anfrage wird bereits verarbeitet - bitte kurz warten',
+        );
+      }
+      http.getResponse<Response>().status(existing.statusCode ?? 201);
+      return of(existing.responseBody);
+    }
+
+    return next.handle().pipe(
+      mergeMap((body: unknown) =>
+        from(this.complete(userId, key, http.getResponse<Response>(), body)),
+      ),
+      catchError((error: unknown) =>
+        from(this.release(userId, key)).pipe(
+          mergeMap(() => throwError(() => error)),
+        ),
+      ),
+    );
+  }
+
+  private async claim(
+    userId: string,
+    key: string,
+    scope: string,
+  ): Promise<boolean> {
+    try {
+      await this.prisma.idempotencyRecord.create({
+        data: { userId, key, scope },
+      });
+      return true;
+    } catch (error: unknown) {
+      if (
+        error instanceof Prisma.PrismaClientKnownRequestError &&
+        error.code === 'P2002'
+      ) {
+        return false;
+      }
+      throw error;
+    }
+  }
+
+  private async complete(
+    userId: string,
+    key: string,
+    response: Response,
+    body: unknown,
+  ): Promise<unknown> {
+    await this.prisma.idempotencyRecord.update({
+      where: { userId_key: { userId, key } },
+      data: {
+        status: 'COMPLETED',
+        statusCode: response.statusCode,
+        // Round-trip through JSON so Dates etc. are stored exactly as the
+        // client received them the first time.
+        responseBody:
+          body === undefined
+            ? Prisma.JsonNull
+            : (JSON.parse(JSON.stringify(body)) as Prisma.InputJsonValue),
+      },
+    });
+    return body;
+  }
+
+  private async release(userId: string, key: string): Promise<void> {
+    await this.prisma.idempotencyRecord.deleteMany({ where: { userId, key } });
+  }
+
+  /**
+   * A PENDING row older than any real request means the process died
+   * mid-request (pod restart) and never completed or released the key.
+   * Without this, the queued entry holding that key would get "already
+   * processing" forever and never sync.
+   */
+  private async releaseIfAbandoned(
+    userId: string,
+    key: string,
+  ): Promise<boolean> {
+    const released = await this.prisma.idempotencyRecord.deleteMany({
+      where: {
+        userId,
+        key,
+        status: 'PENDING',
+        createdAt: { lt: new Date(Date.now() - ABANDONED_PENDING_MS) },
+      },
+    });
+    return released.count > 0;
+  }
+}

ApiCore-Backend/src/common/idempotency/idempotent.decorator.ts

@@ -0,0 +1,13 @@
+import { SetMetadata } from '@nestjs/common';
+
+export const IDEMPOTENT_KEY = 'idempotent';
+
+/**
+ * Opts a POST handler into Idempotency-Key handling (see
+ * IdempotencyInterceptor). Opt-in rather than global on purpose: the
+ * interceptor stores the response body, and some POST responses carry
+ * secrets (MFA setup, tokens) that must never be persisted. Only plain
+ * record-creating endpoints - the ones the offline queue and quick-entry
+ * forms retry - carry this decorator.
+ */
+export const Idempotent = () => SetMetadata(IDEMPOTENT_KEY, true);

ApiCore-Backend/src/common/middleware/no-store.middleware.ts

@@ -0,0 +1,22 @@
+import type { NextFunction, Request, Response } from 'express';
+
+// The public origin pages of honey lots are the only answers meant for
+// everyone; they may be cached briefly.
+const CACHEABLE_PREFIX = '/api/v1/public/';
+
+/**
+ * Personal data, tokens and exports must not end up in a browser's
+ * back/forward cache or a shared proxy. Every API answer is no-store unless
+ * it is one of the public, anonymous ones.
+ */
+export function noStoreMiddleware(
+  req: Request,
+  res: Response,
+  next: NextFunction,
+): void {
+  if (!req.path.startsWith(CACHEABLE_PREFIX)) {
+    res.setHeader('Cache-Control', 'no-store');
+    res.setHeader('Pragma', 'no-cache');
+  }
+  next();
+}

ApiCore-Backend/src/common/middleware/request-logger.middleware.spec.ts

@@ -8,7 +8,12 @@ describe('requestLoggerMiddleware', () => {
   });
 
   function fakeRequest(): Request {
-    return { method: 'GET', originalUrl: '/api/v1/dashboard' } as Request;
+    return {
+      method: 'GET',
+      baseUrl: '',
+      path: '/api/v1/dashboard',
+      originalUrl: '/api/v1/dashboard?q=secret',
+    } as Request;
   }
 
   function fakeResponse(statusCode: number): {

ApiCore-Backend/src/common/middleware/request-logger.middleware.ts

@@ -18,7 +18,9 @@ export function requestLoggerMiddleware(
   const start = Date.now();
   res.on('finish', () => {
     const duration = Date.now() - start;
-    const line = `${req.method} ${req.originalUrl} ${res.statusCode} ${duration}ms`;
+    // Path only: query strings can carry secrets (the SSO callback's
+    // authorization code and state, search terms with personal data).
+    const line = `${req.method} ${req.baseUrl}${req.path} ${res.statusCode} ${duration}ms`;
     if (res.statusCode >= 500) {
       logger.error(line);
     } else if (res.statusCode >= 400) {

ApiCore-Backend/src/common/password/password-policy.spec.ts

@@ -0,0 +1,76 @@
+import { BadRequestException } from '@nestjs/common';
+import { plainToInstance } from 'class-transformer';
+import { validateSync } from 'class-validator';
+import * as crypto from 'node:crypto';
+import { IsNewPassword, assertPasswordNotBreached } from './password-policy';
+
+class Dto {
+  @IsNewPassword()
+  password!: string;
+}
+
+function errorsFor(password: string): number {
+  return validateSync(plainToInstance(Dto, { password })).length;
+}
+
+describe('password policy', () => {
+  it('requires 12 characters and at most 72 bytes', () => {
+    expect(errorsFor('kurz123!')).toBe(1);
+    expect(errorsFor('lang-genug-12')).toBe(0);
+    expect(errorsFor('a'.repeat(72))).toBe(0);
+    expect(errorsFor('a'.repeat(73))).toBe(1);
+    expect(errorsFor('ä'.repeat(37))).toBe(1); // 74 bytes
+  });
+
+  describe('assertPasswordNotBreached', () => {
+    const originalEnv = process.env.NODE_ENV;
+    let fetchMock: jest.SpiedFunction<typeof fetch>;
+
+    beforeEach(() => {
+      process.env.NODE_ENV = 'production';
+      fetchMock = jest.spyOn(global, 'fetch');
+    });
+
+    afterEach(() => {
+      process.env.NODE_ENV = originalEnv;
+      fetchMock.mockRestore();
+    });
+
+    function rangeFor(password: string, count: number): string {
+      const sha1 = crypto
+        .createHash('sha1')
+        .update(password)
+        .digest('hex')
+        .toUpperCase();
+      return `0000000000000000000000000000000000A:0\r\n${sha1.slice(5)}:${count}\r\n`;
+    }
+
+    it('sends only the first five hash characters', async () => {
+      fetchMock.mockResolvedValue(new Response(rangeFor('other', 3)));
+      await assertPasswordNotBreached('Pferdebatterie-Heftklammer');
+      const [url] = fetchMock.mock.calls[0] as [string];
+      expect(url).toMatch(/\/range\/[0-9A-F]{5}$/);
+    });
+
+    it('refuses a breached password', async () => {
+      fetchMock.mockResolvedValue(new Response(rangeFor('Passwort1234', 4242)));
+      await expect(
+        assertPasswordNotBreached('Passwort1234'),
+      ).rejects.toBeInstanceOf(BadRequestException);
+    });
+
+    it('ignores padding entries with a count of 0', async () => {
+      fetchMock.mockResolvedValue(new Response(rangeFor('Padding-Only-1', 0)));
+      await expect(
+        assertPasswordNotBreached('Padding-Only-1'),
+      ).resolves.toBeUndefined();
+    });
+
+    it('accepts the password when the service is unreachable', async () => {
+      fetchMock.mockRejectedValue(new Error('offline'));
+      await expect(
+        assertPasswordNotBreached('Irgendwas-123'),
+      ).resolves.toBeUndefined();
+    });
+  });
+});

ApiCore-Backend/src/common/password/password-policy.ts

@@ -0,0 +1,95 @@
+import { BadRequestException, Logger } from '@nestjs/common';
+import { applyDecorators } from '@nestjs/common';
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, MinLength, ValidateBy, buildMessage } from 'class-validator';
+import * as crypto from 'node:crypto';
+
+/** OWASP ASVS 2.1.1: at least 12 characters for a new password. */
+export const MIN_PASSWORD_LENGTH = 12;
+/** bcrypt ignores everything after 72 bytes - refuse instead of truncating. */
+export const MAX_PASSWORD_BYTES = 72;
+
+const PWNED_RANGE_URL = 'https://api.pwnedpasswords.com/range/';
+const BREACH_CHECK_TIMEOUT_MS = 3_000;
+const logger = new Logger('PasswordPolicy');
+
+/** Validation for every NEW password (not for login, where old ones still count). */
+export function IsNewPassword(): PropertyDecorator {
+  return applyDecorators(
+    ApiProperty({
+      minLength: MIN_PASSWORD_LENGTH,
+      description: `Mindestens ${MIN_PASSWORD_LENGTH} Zeichen, höchstens ${MAX_PASSWORD_BYTES} Byte`,
+    }),
+    IsString(),
+    MinLength(MIN_PASSWORD_LENGTH, {
+      message: `Passwort muss mindestens ${MIN_PASSWORD_LENGTH} Zeichen lang sein`,
+    }),
+    ValidateBy({
+      name: 'maxPasswordBytes',
+      validator: {
+        validate: (value: unknown) =>
+          typeof value === 'string' &&
+          Buffer.byteLength(value, 'utf8') <= MAX_PASSWORD_BYTES,
+        defaultMessage: buildMessage(
+          () =>
+            `Passwort darf höchstens ${MAX_PASSWORD_BYTES} Byte lang sein (bei Umlauten weniger Zeichen)`,
+        ),
+      },
+    }),
+  );
+}
+
+function breachCheckEnabled(): boolean {
+  return (
+    process.env.PASSWORD_BREACH_CHECK !== 'false' &&
+    process.env.NODE_ENV !== 'test'
+  );
+}
+
+/**
+ * Refuses a password that appears in known data breaches (Have I Been
+ * Pwned, k-anonymity: only the first 5 hex characters of its SHA-1 leave
+ * the server, padded responses). If the service cannot be reached the
+ * password is accepted and a warning logged - a third-party outage must not
+ * lock everyone out of changing passwords. PASSWORD_BREACH_CHECK=false turns
+ * it off for offline deployments.
+ */
+export async function assertPasswordNotBreached(
+  password: string,
+): Promise<void> {
+  if (!breachCheckEnabled()) {
+    return;
+  }
+  const sha1 = crypto
+    .createHash('sha1')
+    .update(password)
+    .digest('hex')
+    .toUpperCase();
+  const prefix = sha1.slice(0, 5);
+  const suffix = sha1.slice(5);
+  let body: string;
+  try {
+    const response = await fetch(`${PWNED_RANGE_URL}${prefix}`, {
+      headers: { 'Add-Padding': 'true', 'User-Agent': 'ApiCore' },
+      signal: AbortSignal.timeout(BREACH_CHECK_TIMEOUT_MS),
+    });
+    if (!response.ok) {
+      throw new Error(`HTTP ${response.status}`);
+    }
+    body = await response.text();
+  } catch (error: unknown) {
+    logger.warn(
+      `Breach check unavailable, password accepted: ${error instanceof Error ? error.message : String(error)}`,
+    );
+    return;
+  }
+  const breached = body.split('\n').some((line) => {
+    const [hashSuffix, count] = line.trim().split(':');
+    return hashSuffix === suffix && Number(count) > 0;
+  });
+  if (breached) {
+    throw new BadRequestException(
+      'Dieses Passwort ist aus Datenlecks bekannt und daher unsicher. Bitte ein anderes wählen.',
+    );
+  }
+}

ApiCore-Backend/src/common/validation/normalize-email.ts

@@ -0,0 +1,12 @@
+import { Transform } from 'class-transformer';
+
+/**
+ * Emails are compared case-insensitively (see UsersService.findByEmail);
+ * storing them trimmed and lower-case keeps "[email protected]" and "[email protected]"
+ * from becoming two accounts.
+ */
+export function NormalizeEmail(): PropertyDecorator {
+  return Transform(({ value }: { value: unknown }) =>
+    typeof value === 'string' ? value.trim().toLowerCase() : value,
+  );
+}

ApiCore-Backend/src/export/colony-record-card.ts

@@ -0,0 +1,431 @@
+import { NotFoundException } from '@nestjs/common';
+import PDFDocument from 'pdfkit';
+import { PrismaService } from '../prisma/prisma.service';
+import {
+  PDF_MARGIN,
+  drawSection,
+  drawTable,
+  fillWidth,
+  formatDay,
+  orDash,
+} from './pdf-table';
+
+/**
+ * Stockkarte: the complete written record of one colony - master data, queen,
+ * every inspection as a table row, treatments, feedings, varroa counts and
+ * harvests. For the folder at the apiary or to hand over with a sold colony.
+ * Whole history by default, or one calendar year.
+ */
+
+const COLONY_TYPE_LABELS: Record<string, string> = {
+  PRODUCTION_COLONY: 'Wirtschaftsvolk',
+  NUCLEUS_COLONY: 'Ableger',
+  YOUNG_COLONY: 'Jungvolk',
+  CARETAKER_COLONY: 'Pflegevolk',
+  MATING_NUCLEUS: 'Begattungseinheit',
+  RESERVE_COLONY: 'Reservevolk',
+};
+
+const COLONY_STATUS_LABELS: Record<string, string> = {
+  ACTIVE: 'Aktiv',
+  WEAK: 'Schwach',
+  CONSPICUOUS: 'Auffällig',
+  QUEENLESS: 'Weisellos',
+  DISSOLVED: 'Aufgelöst',
+  SOLD: 'Verkauft',
+  DECEASED: 'Eingegangen',
+  MERGED: 'Vereinigt',
+};
+
+const FEED_TYPE_LABELS: Record<string, string> = {
+  SUGAR_WATER: 'Zuckerwasser',
+  FEED_SYRUP: 'Futtersirup',
+  FEED_PASTE: 'Futterteig',
+  OWN_HONEY: 'Eigener Honig',
+  OTHER: 'Sonstiges',
+};
+
+const VARROA_METHOD_LABELS: Record<string, string> = {
+  NATURAL_MITE_FALL: 'Natürlicher Milbenfall',
+  POWDERED_SUGAR: 'Puderzucker',
+  WASHING_METHOD: 'Auswaschen',
+  DRONE_BROOD_CONTROL: 'Drohnenbrut',
+};
+
+export interface ColonyRecordCard {
+  generatedAt: Date;
+  year: number | null;
+  colony: {
+    code: string;
+    colonyType: string;
+    status: string;
+    hiveType: string | null;
+    originText: string | null;
+    createdAt: Date;
+    apiaryName: string;
+    apiaryLocation: string | null;
+  };
+  currentQueen: {
+    code: string;
+    hatchYear: number | null;
+    markingColor: string | null;
+    breed: string | null;
+    origin: string | null;
+  } | null;
+  queenHistory: { code: string; startDate: Date; endDate: Date | null }[];
+  inspections: {
+    date: Date;
+    colonyStrength: number | null;
+    openBroodPresent: boolean | null;
+    cappedBroodPresent: boolean | null;
+    eggsPresent: boolean | null;
+    queenSeen: boolean | null;
+    queenCellsPresent: boolean | null;
+    gentleness: number | null;
+    swarmMood: number | null;
+    feedStatus: string | null;
+    measures: string | null;
+    notes: string | null;
+  }[];
+  treatments: {
+    date: Date;
+    endDate: Date | null;
+    product: string;
+    activeIngredient: string | null;
+    amount: string | null;
+    batchNumber: string | null;
+    withdrawalPeriodDays: number | null;
+  }[];
+  feedings: {
+    date: Date;
+    feedType: string;
+    product: string | null;
+    amount: number;
+    unit: string;
+  }[];
+  varroaMeasurements: {
+    date: Date;
+    method: string;
+    miteCount: number | null;
+    calculatedValue: number | null;
+  }[];
+  harvests: {
+    date: Date;
+    honeyType: string | null;
+    netWeight: number | null;
+  }[];
+}
+
+function dateFilter(year: number | null) {
+  return year === null
+    ? undefined
+    : {
+        gte: new Date(Date.UTC(year, 0, 1)),
+        lt: new Date(Date.UTC(year + 1, 0, 1)),
+      };
+}
+
+export async function buildColonyRecordCard(
+  prisma: PrismaService,
+  colonyId: string,
+  year: number | null,
+): Promise<ColonyRecordCard> {
+  const colony = await prisma.colony.findUnique({
+    where: { id: colonyId },
+    include: { apiary: true, currentQueen: true },
+  });
+  if (!colony) {
+    throw new NotFoundException('Colony not found');
+  }
+  const date = dateFilter(year);
+  const [
+    inspections,
+    treatments,
+    feedings,
+    varroa,
+    harvestLinks,
+    queenHistory,
+  ] = await Promise.all([
+    prisma.inspection.findMany({
+      where: { colonyId, date },
+      orderBy: { date: 'asc' },
+    }),
+    prisma.treatment.findMany({
+      where: { colonyId, date },
+      orderBy: { date: 'asc' },
+    }),
+    prisma.feeding.findMany({
+      where: { colonyId, date },
+      orderBy: { date: 'asc' },
+    }),
+    prisma.varroaMeasurement.findMany({
+      where: { colonyId, date },
+      orderBy: { date: 'asc' },
+    }),
+    prisma.harvestColony.findMany({
+      where: { colonyId, harvest: { date } },
+      include: { harvest: true },
+      orderBy: { harvest: { date: 'asc' } },
+    }),
+    prisma.queenColonyHistory.findMany({
+      where: { colonyId },
+      include: { queen: true },
+      orderBy: { startDate: 'asc' },
+    }),
+  ]);
+
+  const queen = colony.currentQueen;
+  return {
+    generatedAt: new Date(),
+    year,
+    colony: {
+      code: colony.code,
+      colonyType: colony.colonyType,
+      status: colony.status,
+      hiveType: colony.hiveType,
+      originText: colony.originText,
+      createdAt: colony.createdAt,
+      apiaryName: colony.apiary.name,
+      apiaryLocation: colony.apiary.location,
+    },
+    currentQueen: queen
+      ? {
+          code: queen.code,
+          hatchYear: queen.hatchYear,
+          markingColor: queen.markingColor,
+          breed: queen.breed,
+          origin: queen.origin,
+        }
+      : null,
+    queenHistory: queenHistory.map((entry) => ({
+      code: entry.queen.code,
+      startDate: entry.startDate,
+      endDate: entry.endDate,
+    })),
+    inspections: inspections.map((i) => ({
+      date: i.date,
+      colonyStrength: i.colonyStrength,
+      openBroodPresent: i.openBroodPresent,
+      cappedBroodPresent: i.cappedBroodPresent,
+      eggsPresent: i.eggsPresent,
+      queenSeen: i.queenSeen,
+      queenCellsPresent: i.queenCellsPresent,
+      gentleness: i.gentleness,
+      swarmMood: i.swarmMood,
+      feedStatus: i.feedStatus,
+      measures: i.measures,
+      notes: i.notes,
+    })),
+    treatments: treatments.map((t) => ({
+      date: t.date,
+      endDate: t.endDate,
+      product: t.product,
+      activeIngredient: t.activeIngredient,
+      amount: t.amount,
+      batchNumber: t.batchNumber,
+      withdrawalPeriodDays: t.withdrawalPeriodDays,
+    })),
+    feedings: feedings.map((f) => ({
+      date: f.date,
+      feedType: f.feedType,
+      product: f.product,
+      amount: f.amount,
+      unit: f.unit,
+    })),
+    varroaMeasurements: varroa.map((v) => ({
+      date: v.date,
+      method: v.method,
+      miteCount: v.miteCount,
+      calculatedValue: v.calculatedValue,
+    })),
+    harvests: harvestLinks.map((link) => ({
+      date: link.harvest.date,
+      honeyType: link.harvest.honeyType,
+      netWeight: link.harvest.netWeight,
+    })),
+  };
+}
+
+// ---------------------------------------------------------------------------
+// Rendering
+// ---------------------------------------------------------------------------
+
+const MARGIN = PDF_MARGIN;
+const day = formatDay;
+const section = drawSection;
+
+function yesNo(value: boolean | null): string {
+  return value === null ? '–' : value ? 'ja' : 'nein';
+}
+
+export function renderColonyRecordCardPdf(
+  card: ColonyRecordCard,
+): Promise<Buffer> {
+  return new Promise((resolve, reject) => {
+    // Landscape: the inspection table needs the width.
+    const doc = new PDFDocument({
+      size: 'A4',
+      layout: 'landscape',
+      margin: MARGIN,
+    });
+    const chunks: Buffer[] = [];
+    doc.on('data', (chunk: Buffer) => chunks.push(chunk));
+    doc.on('end', () => resolve(Buffer.concat(chunks)));
+    doc.on('error', reject);
+
+    const { colony } = card;
+    doc
+      .font('Helvetica-Bold')
+      .fontSize(16)
+      .text(`Stockkarte ${colony.code}`, MARGIN, MARGIN);
+    doc
+      .font('Helvetica')
+      .fontSize(9)
+      .text(
+        `${card.year === null ? 'Gesamte Historie' : `Jahr ${card.year}`} · erstellt am ${day(card.generatedAt)}`,
+      );
+    doc.moveDown(0.5);
+
+    doc
+      .fontSize(9)
+      .text(
+        [
+          `Stand: ${colony.apiaryName}${colony.apiaryLocation ? ` (${colony.apiaryLocation})` : ''}`,
+          `Art: ${COLONY_TYPE_LABELS[colony.colonyType] ?? colony.colonyType}`,
+          `Status: ${COLONY_STATUS_LABELS[colony.status] ?? colony.status}`,
+          `Beute: ${orDash(colony.hiveType)}`,
+          `Herkunft: ${orDash(colony.originText)}`,
+          `Erfasst seit: ${day(colony.createdAt)}`,
+        ].join('   ·   '),
+      );
+
+    section(doc, 'Königin');
+    const queen = card.currentQueen;
+    doc
+      .font('Helvetica')
+      .fontSize(9)
+      .text(
+        queen
+          ? `${queen.code} · Schlupfjahr ${orDash(queen.hatchYear)} · Zeichen ${orDash(queen.markingColor)} · Rasse ${orDash(queen.breed)} · Herkunft ${orDash(queen.origin)}`
+          : 'Keine Königin zugeordnet.',
+        MARGIN,
+      );
+    if (card.queenHistory.length > 0) {
+      doc.text(
+        `Verlauf: ${card.queenHistory
+          .map(
+            (q) =>
+              `${q.code} (${day(q.startDate)} – ${q.endDate ? day(q.endDate) : 'heute'})`,
+          )
+          .join('; ')}`,
+      );
+    }
+
+    section(doc, 'Durchsichten');
+    drawTable(
+      doc,
+      fillWidth(doc, [
+        { header: 'Datum', width: 58 },
+        { header: 'Stärke (Waben)', width: 52 },
+        { header: 'Stifte', width: 36 },
+        { header: 'Offene Brut', width: 42 },
+        { header: 'Verd. Brut', width: 42 },
+        { header: 'Kö gesehen', width: 44 },
+        { header: 'Weiselzellen', width: 60 },
+        { header: 'Sanftmut 1–5', width: 44 },
+        { header: 'Schwarmtrieb 1–5', width: 66 },
+        { header: 'Futter', width: 56 },
+        { header: 'Maßnahmen', width: 126 },
+        { header: 'Notizen', width: 0 },
+      ]),
+      card.inspections.map((i) => [
+        day(i.date),
+        orDash(i.colonyStrength),
+        yesNo(i.eggsPresent),
+        yesNo(i.openBroodPresent),
+        yesNo(i.cappedBroodPresent),
+        yesNo(i.queenSeen),
+        yesNo(i.queenCellsPresent),
+        orDash(i.gentleness),
+        orDash(i.swarmMood),
+        orDash(i.feedStatus),
+        orDash(i.measures),
+        orDash(i.notes),
+      ]),
+    );
+
+    section(doc, 'Behandlungen');
+    drawTable(
+      doc,
+      [
+        { header: 'Datum', width: 70 },
+        { header: 'Ende', width: 70 },
+        { header: 'Mittel', width: 150 },
+        { header: 'Wirkstoff', width: 120 },
+        { header: 'Menge', width: 100 },
+        { header: 'Chargen-Nr.', width: 100 },
+        { header: 'Wartezeit (Tage)', width: 80 },
+      ],
+      card.treatments.map((t) => [
+        day(t.date),
+        t.endDate ? day(t.endDate) : '–',
+        t.product,
+        orDash(t.activeIngredient),
+        orDash(t.amount),
+        orDash(t.batchNumber),
+        orDash(t.withdrawalPeriodDays),
+      ]),
+    );
+
+    section(doc, 'Fütterungen');
+    drawTable(
+      doc,
+      [
+        { header: 'Datum', width: 70 },
+        { header: 'Futterart', width: 120 },
+        { header: 'Produkt', width: 200 },
+        { header: 'Menge', width: 100 },
+      ],
+      card.feedings.map((f) => [
+        day(f.date),
+        FEED_TYPE_LABELS[f.feedType] ?? f.feedType,
+        orDash(f.product),
+        `${f.amount} ${f.unit}`,
+      ]),
+    );
+
+    section(doc, 'Varroa');
+    drawTable(
+      doc,
+      [
+        { header: 'Datum', width: 70 },
+        { header: 'Methode', width: 150 },
+        { header: 'Milben gezählt', width: 90 },
+        { header: 'Berechneter Wert', width: 100 },
+      ],
+      card.varroaMeasurements.map((v) => [
+        day(v.date),
+        VARROA_METHOD_LABELS[v.method] ?? v.method,
+        orDash(v.miteCount),
+        v.calculatedValue === null ? '–' : v.calculatedValue.toFixed(1),
+      ]),
+    );
+
+    section(doc, 'Ernten');
+    drawTable(
+      doc,
+      [
+        { header: 'Datum', width: 70 },
+        { header: 'Sorte', width: 200 },
+        { header: 'Netto (kg, gesamte Ernte)', width: 140 },
+      ],
+      card.harvests.map((h) => [
+        day(h.date),
+        orDash(h.honeyType),
+        orDash(h.netWeight),
+      ]),
+    );
+
+    doc.end();
+  });
+}

ApiCore-Backend/src/export/csv-field.spec.ts

@@ -0,0 +1,21 @@
+import { toCsvField } from './export.service';
+
+describe('toCsvField', () => {
+  it('neutralizes cells that a spreadsheet would run as a formula', () => {
+    expect(toCsvField('=HYPERLINK("http://evil","x")')).toBe(
+      `"'=HYPERLINK(""http://evil"",""x"")"`,
+    );
+    expect(toCsvField('+1+1')).toBe("'+1+1");
+    expect(toCsvField('-2')).toBe("'-2");
+    expect(toCsvField('@SUM(A1)')).toBe("'@SUM(A1)");
+  });
+
+  it('keeps numbers, including negative ones, as numbers', () => {
+    expect(toCsvField(-2.5)).toBe('-2.5');
+    expect(toCsvField(0)).toBe('0');
+  });
+
+  it('quotes carriage returns too', () => {
+    expect(toCsvField('a\rb')).toBe('"a\rb"');
+  });
+});

ApiCore-Backend/src/export/export.service.ts

@@ -1,5 +1,10 @@
 import { Injectable, BadRequestException } from '@nestjs/common';
 import PDFDocument from 'pdfkit';
+import {
+  buildColonyRecordCard,
+  renderColonyRecordCardPdf,
+} from './colony-record-card';
+import { buildTreatmentLog, renderTreatmentLogPdf } from './treatment-log';
 import { PrismaService } from '../prisma/prisma.service';
 import { HoneyBatchesService } from '../honey-batches/honey-batches.service';
 import {
@@ -22,6 +27,8 @@ const PDF_REPORTS = [
   'honey-batch-traceability',
   'colony-annual-report',
   'apiary-annual-report',
+  'colony-record-card',
+  'treatment-log',
 ] as const;
 type PdfReport = (typeof PDF_REPORTS)[number];
 
@@ -64,12 +71,20 @@ function stringifyCsvValue(value: unknown): string {
   return JSON.stringify(value);
 }
 
-function toCsvField(value: unknown): string {
+// A text cell starting with one of these is run as a formula by Excel and
+// LibreOffice (=HYPERLINK(...), DDE). Typed-in values such as a colony code
+// are prefixed with ' so they show as text; real numbers are not strings
+// and keep their sign.
+const FORMULA_TRIGGER = /^[=+\-@\t\r]/;
+
+export function toCsvField(value: unknown): string {
   if (value === null || value === undefined) {
     return '';
   }
-  const text = stringifyCsvValue(value);
-  if (/[",\n]/.test(text)) {
+  const raw = stringifyCsvValue(value);
+  const text =
+    typeof value === 'string' && FORMULA_TRIGGER.test(raw) ? `'${raw}` : raw;
+  if (/[",\r\n]/.test(text)) {
     return `"${text.replace(/"/g, '""')}"`;
   }
   return text;
@@ -188,6 +203,28 @@ export class ExportService {
         );
         return renderApiaryAnnualReportPdf(apiaryReport);
       }
+      case 'colony-record-card': {
+        if (!options.colonyId) {
+          throw new BadRequestException(
+            'Query parameter colonyId is required for this report',
+          );
+        }
+        // Without a year the record card covers the colony's whole history.
+        const card = await buildColonyRecordCard(
+          this.prisma,
+          options.colonyId,
+          options.year ? resolveYear(options.year) : null,
+        );
+        return renderColonyRecordCardPdf(card);
+      }
+      case 'treatment-log': {
+        const log = await buildTreatmentLog(
+          this.prisma,
+          resolveYear(options.year),
+          options.apiaryId,
+        );
+        return renderTreatmentLogPdf(log);
+      }
     }
   }
 

ApiCore-Backend/src/export/pdf-table.ts

@@ -0,0 +1,107 @@
+/**
+ * Small pdfkit helpers shared by the printable records (Stockkarte,
+ * Bestandsbuch): dates, empty values and a table that repeats its header on
+ * every page.
+ */
+
+export const PDF_MARGIN = 36;
+
+export interface PdfColumn {
+  header: string;
+  width: number;
+}
+
+export function formatDay(date: Date): string {
+  return date.toLocaleDateString('de-DE', {
+    day: '2-digit',
+    month: '2-digit',
+    year: 'numeric',
+    timeZone: 'UTC',
+  });
+}
+
+export function orDash(value: string | number | null | undefined): string {
+  return value === null || value === undefined || value === ''
+    ? '–'
+    : String(value);
+}
+
+/** Widens the last column so the table fills the page width. */
+export function fillWidth(
+  doc: PDFKit.PDFDocument,
+  columns: PdfColumn[],
+): PdfColumn[] {
+  const fixed = columns.slice(0, -1).reduce((sum, c) => sum + c.width, 0);
+  const last = columns[columns.length - 1];
+  return [
+    ...columns.slice(0, -1),
+    { ...last, width: doc.page.width - 2 * PDF_MARGIN - fixed },
+  ];
+}
+
+export function drawSection(doc: PDFKit.PDFDocument, title: string): void {
+  if (doc.y > doc.page.height - PDF_MARGIN - 80) doc.addPage();
+  doc.moveDown(0.6);
+  doc
+    .font('Helvetica-Bold')
+    .fontSize(11)
+    .fillColor('#000000')
+    .text(title, PDF_MARGIN);
+  doc.moveDown(0.2);
+}
+
+/** Draws a simple table, repeating the header on every new page. */
+export function drawTable(
+  doc: PDFKit.PDFDocument,
+  columns: PdfColumn[],
+  rows: string[][],
+): void {
+  const left = PDF_MARGIN;
+  const bottomLimit = doc.page.height - PDF_MARGIN - 20;
+
+  const drawRow = (cells: string[], bold: boolean) => {
+    doc.font(bold ? 'Helvetica-Bold' : 'Helvetica').fontSize(8);
+    const heights = cells.map((cell, index) =>
+      doc.heightOfString(cell, { width: columns[index].width - 4 }),
+    );
+    const rowHeight = Math.max(...heights, 10) + 4;
+    if (doc.y + rowHeight > bottomLimit) {
+      doc.addPage();
+      if (!bold) {
+        drawRow(
+          columns.map((c) => c.header),
+          true,
+        );
+        doc.font('Helvetica').fontSize(8);
+      }
+    }
+    const top = doc.y;
+    let x = left;
+    cells.forEach((cell, index) => {
+      doc.text(cell, x + 2, top + 2, { width: columns[index].width - 4 });
+      x += columns[index].width;
+    });
+    doc
+      .moveTo(left, top + rowHeight)
+      .lineTo(x, top + rowHeight)
+      .lineWidth(0.3)
+      .strokeColor('#999999')
+      .stroke();
+    doc.y = top + rowHeight;
+  };
+
+  drawRow(
+    columns.map((c) => c.header),
+    true,
+  );
+  if (rows.length === 0) {
+    doc
+      .font('Helvetica-Oblique')
+      .fontSize(8)
+      .text('Keine Einträge.', left + 2, doc.y + 2);
+    doc.moveDown(0.5);
+    return;
+  }
+  for (const row of rows) drawRow(row, false);
+  doc.moveDown(0.5);
+}

ApiCore-Backend/src/export/treatment-log.spec.ts

@@ -0,0 +1,126 @@
+import {
+  apiaryOnDate,
+  groupTreatmentLog,
+  TreatmentLogSource,
+} from './treatment-log';
+
+const d = (value: string) => new Date(`${value}T00:00:00.000Z`);
+
+function source(overrides: Partial<TreatmentLogSource>): TreatmentLogSource {
+  return {
+    id: 't',
+    colonyId: 'c1',
+    colonyCode: 'V-01',
+    colonyApiaryId: 'today',
+    apiaryId: null,
+    date: d('2026-08-01'),
+    startDate: null,
+    endDate: null,
+    product: 'Oxalsäure',
+    amount: '30 ml',
+    batchNumber: 'B1',
+    supplier: 'Imkereibedarf X',
+    purchaseProof: 'Rechnung 1',
+    prescribingVet: null,
+    withdrawalPeriodDays: 0,
+    administeredBy: 'Imker',
+    ...overrides,
+  };
+}
+
+describe('apiaryOnDate', () => {
+  it('uses the apiary stored with the treatment', () => {
+    expect(apiaryOnDate(source({ apiaryId: 'stored' }), [])).toEqual({
+      apiaryId: 'stored',
+      uncertain: false,
+    });
+  });
+
+  it('uses the last move on or before the treatment day', () => {
+    const moves = [
+      { colonyId: 'c1', apiaryId: 'summer', movedAt: d('2026-05-01') },
+      { colonyId: 'c1', apiaryId: 'winter', movedAt: d('2026-10-01') },
+    ];
+    expect(apiaryOnDate(source({}), moves)).toEqual({
+      apiaryId: 'summer',
+      uncertain: false,
+    });
+  });
+
+  it('flags the location when the colony was only moved after the treatment', () => {
+    const moves = [
+      { colonyId: 'c1', apiaryId: 'today', movedAt: d('2026-09-01') },
+    ];
+    expect(apiaryOnDate(source({}), moves)).toEqual({
+      apiaryId: 'today',
+      uncertain: true,
+    });
+  });
+
+  it('trusts today when the colony was never moved', () => {
+    expect(apiaryOnDate(source({}), [])).toEqual({
+      apiaryId: 'today',
+      uncertain: false,
+    });
+  });
+});
+
+describe('groupTreatmentLog', () => {
+  it('puts identical treatments of several colonies into one row, per apiary', () => {
+    const sheets = groupTreatmentLog(
+      [
+        source({ id: '1', colonyId: 'c1', colonyCode: 'V-02', apiaryId: 'a' }),
+        source({ id: '2', colonyId: 'c2', colonyCode: 'V-01', apiaryId: 'a' }),
+        source({ id: '3', colonyId: 'c3', colonyCode: 'V-09', apiaryId: 'b' }),
+        source({
+          id: '4',
+          colonyId: 'c4',
+          colonyCode: 'V-03',
+          apiaryId: 'a',
+          amount: '50 ml',
+        }),
+      ],
+      [],
+    );
+
+    const sheetA = sheets.find((sheet) => sheet.apiaryId === 'a');
+    expect(sheetA?.rows).toHaveLength(2);
+    expect(sheetA?.rows[0].colonyCodes).toEqual(['V-01', 'V-02']);
+    expect(sheets.find((sheet) => sheet.apiaryId === 'b')?.rows).toHaveLength(
+      1,
+    );
+  });
+
+  it('computes the treatment duration in days, inclusive', () => {
+    const [sheet] = groupTreatmentLog(
+      [
+        source({
+          apiaryId: 'a',
+          startDate: d('2026-08-01'),
+          endDate: d('2026-08-14'),
+        }),
+      ],
+      [],
+    );
+    expect(sheet.rows[0].durationDays).toBe(14);
+  });
+
+  it('keeps missing mandatory fields empty so the PDF can flag them', () => {
+    const [sheet] = groupTreatmentLog(
+      [
+        source({
+          apiaryId: 'a',
+          supplier: null,
+          purchaseProof: null,
+          withdrawalPeriodDays: null,
+        }),
+      ],
+      [],
+    );
+    expect(sheet.rows[0]).toMatchObject({
+      supplier: null,
+      purchaseProof: null,
+      withdrawalPeriodDays: null,
+    });
+  });
+});

ApiCore-Backend/src/export/treatment-log.ts

@@ -0,0 +1,353 @@
+import PDFDocument from 'pdfkit';
+import { PrismaService } from '../prisma/prisma.service';
+import {
+  PDF_MARGIN,
+  drawTable,
+  fillWidth,
+  formatDay,
+  orDash,
+} from './pdf-table';
+
+/**
+ * Bestandsbuch: record of every veterinary medicine applied to bees, as
+ * required for food-producing animals by Art. 108 Regulation (EU) 2019/6 -
+ * for every product, including over-the-counter formic or oxalic acid. The
+ * columns follow the model sheet of the German veterinary authorities
+ * (Veterinäramt Kassel, "Buchführung über die Anwendung von TAM bei
+ * Bienen", March 2026): one sheet per apiary; colonies, product, supplier
+ * and purchase proof, date and duration, amount, withdrawal period (also
+ * when 0), administering person. Keep 5 years, as well as purchase proofs.
+ *
+ * Missing mandatory information is printed as "FEHLT" so it can be added
+ * before an inspection, instead of silently leaving a gap.
+ */
+
+export const MISSING = 'FEHLT';
+
+export interface TreatmentLogSource {
+  id: string;
+  colonyId: string;
+  colonyCode: string;
+  colonyApiaryId: string;
+  /** Apiary recorded with the treatment (set since this report exists). */
+  apiaryId: string | null;
+  date: Date;
+  startDate: Date | null;
+  endDate: Date | null;
+  product: string;
+  amount: string | null;
+  batchNumber: string | null;
+  supplier: string | null;
+  purchaseProof: string | null;
+  prescribingVet: string | null;
+  withdrawalPeriodDays: number | null;
+  administeredBy: string;
+}
+
+export interface ColonyMove {
+  colonyId: string;
+  apiaryId: string;
+  movedAt: Date;
+}
+
+export interface TreatmentLogRow {
+  colonyCodes: string[];
+  product: string;
+  batchNumber: string | null;
+  supplier: string | null;
+  prescribingVet: string | null;
+  purchaseProof: string | null;
+  date: Date;
+  endDate: Date | null;
+  durationDays: number;
+  amount: string | null;
+  withdrawalPeriodDays: number | null;
+  administeredBy: string;
+  /** Apiary derived from today's assignment, not known for that date. */
+  locationUncertain: boolean;
+}
+
+export interface TreatmentLogSheet {
+  apiaryId: string;
+  rows: TreatmentLogRow[];
+}
+
+/**
+ * Where the colony stood on the day of the treatment: the apiary stored with
+ * the treatment, else the last recorded move on or before that day. Before
+ * the first recorded move the original apiary is not known - then today's
+ * apiary is used and the row is flagged.
+ */
+export function apiaryOnDate(
+  source: TreatmentLogSource,
+  moves: ColonyMove[],
+): { apiaryId: string; uncertain: boolean } {
+  if (source.apiaryId) return { apiaryId: source.apiaryId, uncertain: false };
+  const colonyMoves = moves
+    .filter((move) => move.colonyId === source.colonyId)
+    .sort((a, b) => a.movedAt.getTime() - b.movedAt.getTime());
+  const before = colonyMoves.filter(
+    (move) => move.movedAt.getTime() <= source.date.getTime(),
+  );
+  if (before.length > 0) {
+    return { apiaryId: before[before.length - 1].apiaryId, uncertain: false };
+  }
+  return { apiaryId: source.colonyApiaryId, uncertain: colonyMoves.length > 0 };
+}
+
+function durationDays(start: Date, end: Date | null): number {
+  if (!end) return 1;
+  const days = Math.round((end.getTime() - start.getTime()) / 86_400_000) + 1;
+  return Math.max(days, 1);
+}
+
+/**
+ * One sheet per apiary; treatments that are identical except for the colony
+ * (same day, product, batch, amount, supplier, person) become one row listing
+ * all colonies - as in the paper form.
+ */
+export function groupTreatmentLog(
+  sources: TreatmentLogSource[],
+  moves: ColonyMove[],
+): TreatmentLogSheet[] {
+  const sheets = new Map<string, Map<string, TreatmentLogRow>>();
+  const sorted = [...sources].sort(
+    (a, b) =>
+      a.date.getTime() - b.date.getTime() ||
+      a.colonyCode.localeCompare(b.colonyCode, 'de', { numeric: true }),
+  );
+
+  for (const source of sorted) {
+    const { apiaryId, uncertain } = apiaryOnDate(source, moves);
+    const start = source.startDate ?? source.date;
+    const key = [
+      source.date.toISOString(),
+      source.endDate?.toISOString() ?? '',
+      source.product,
+      source.batchNumber ?? '',
+      source.amount ?? '',
+      source.supplier ?? '',
+      source.purchaseProof ?? '',
+      source.prescribingVet ?? '',
+      source.withdrawalPeriodDays ?? '',
+      source.administeredBy,
+      uncertain,
+    ].join('|');
+
+    const rows = sheets.get(apiaryId) ?? new Map<string, TreatmentLogRow>();
+    const existing = rows.get(key);
+    if (existing) {
+      existing.colonyCodes.push(source.colonyCode);
+    } else {
+      rows.set(key, {
+        colonyCodes: [source.colonyCode],
+        product: source.product,
+        batchNumber: source.batchNumber,
+        supplier: source.supplier,
+        prescribingVet: source.prescribingVet,
+        purchaseProof: source.purchaseProof,
+        date: source.date,
+        endDate: source.endDate,
+        durationDays: durationDays(start, source.endDate),
+        amount: source.amount,
+        withdrawalPeriodDays: source.withdrawalPeriodDays,
+        administeredBy: source.administeredBy,
+        locationUncertain: uncertain,
+      });
+    }
+    sheets.set(apiaryId, rows);
+  }
+
+  return [...sheets.entries()].map(([apiaryId, rows]) => ({
+    apiaryId,
+    rows: [...rows.values()],
+  }));
+}
+
+// ---------------------------------------------------------------------------
+// Loading and rendering
+// ---------------------------------------------------------------------------
+
+export interface TreatmentLog {
+  year: number;
+  generatedAt: Date;
+  holderName: string | null;
+  holderAddress: string | null;
+  sheets: (TreatmentLogSheet & {
+    apiaryName: string;
+    apiaryLocation: string | null;
+  })[];
+}
+
+export async function buildTreatmentLog(
+  prisma: PrismaService,
+  year: number,
+  apiaryId?: string,
+): Promise<TreatmentLog> {
+  const treatments = await prisma.treatment.findMany({
+    where: {
+      date: {
+        gte: new Date(Date.UTC(year, 0, 1)),
+        lt: new Date(Date.UTC(year + 1, 0, 1)),
+      },
+    },
+    include: {
+      colony: { select: { code: true, apiaryId: true } },
+      user: { select: { name: true } },
+    },
+  });
+  const colonyIds = [...new Set(treatments.map((t) => t.colonyId))];
+  const [moves, settings, apiaries] = await Promise.all([
+    prisma.colonyApiaryHistory.findMany({
+      where: { colonyId: { in: colonyIds } },
+      select: { colonyId: true, apiaryId: true, movedAt: true },
+    }),
+    prisma.siteSettings.findUnique({ where: { id: 'singleton' } }),
+    prisma.apiary.findMany({
+      select: { id: true, name: true, location: true, address: true },
+    }),
+  ]);
+
+  const sheets = groupTreatmentLog(
+    treatments.map((t) => ({
+      id: t.id,
+      colonyId: t.colonyId,
+      colonyCode: t.colony.code,
+      colonyApiaryId: t.colony.apiaryId,
+      apiaryId: t.apiaryId,
+      date: t.date,
+      startDate: t.startDate,
+      endDate: t.endDate,
+      product: t.product,
+      amount: t.amount,
+      batchNumber: t.batchNumber,
+      supplier: t.supplier,
+      purchaseProof: t.purchaseProof,
+      prescribingVet: t.prescribingVet,
+      withdrawalPeriodDays: t.withdrawalPeriodDays,
+      administeredBy: t.user.name,
+    })),
+    moves,
+  ).filter((sheet) => !apiaryId || sheet.apiaryId === apiaryId);
+
+  const apiaryById = new Map(apiaries.map((a) => [a.id, a]));
+  return {
+    year,
+    generatedAt: new Date(),
+    holderName: settings?.holderName ?? null,
+    holderAddress: settings?.holderAddress ?? null,
+    sheets: sheets
+      .map((sheet) => {
+        const apiary = apiaryById.get(sheet.apiaryId);
+        return {
+          ...sheet,
+          apiaryName: apiary?.name ?? 'Unbekannter Stand',
+          apiaryLocation: apiary?.address ?? apiary?.location ?? null,
+        };
+      })
+      .sort((a, b) => a.apiaryName.localeCompare(b.apiaryName, 'de')),
+  };
+}
+
+function orMissing(value: string | number | null | undefined): string {
+  return value === null || value === undefined || value === ''
+    ? MISSING
+    : String(value);
+}
+
+function renderSheet(
+  doc: PDFKit.PDFDocument,
+  log: TreatmentLog,
+  sheet: TreatmentLog['sheets'][number] | null,
+): void {
+  doc
+    .font('Helvetica-Bold')
+    .fontSize(14)
+    .text(
+      'Buchführung (Bestandsbuch) über die Anwendung von Tierarzneimitteln bei Bienen',
+      PDF_MARGIN,
+      PDF_MARGIN,
+    );
+  doc.font('Helvetica').fontSize(9);
+  doc.text(
+    `Jahr ${log.year} · erstellt am ${formatDay(log.generatedAt)} · Art. 108 VO (EU) 2019/6`,
+  );
+  doc.moveDown(0.4);
+  doc.text(
+    `Name und Anschrift des Bienenhalters: ${
+      log.holderName || log.holderAddress
+        ? [log.holderName, log.holderAddress].filter(Boolean).join(', ')
+        : `${MISSING} (in ApiCore unter Verwaltung → Automatisierung → Stammdaten & Web eintragen)`
+    }`,
+  );
+  if (sheet) {
+    doc.text(
+      `Standort der Bienen: ${sheet.apiaryName}${sheet.apiaryLocation ? `, ${sheet.apiaryLocation}` : ''}`,
+    );
+  }
+  doc.moveDown(0.5);
+
+  if (!sheet) {
+    doc.text(`Im Jahr ${log.year} wurden keine Behandlungen erfasst.`);
+    return;
+  }
+
+  const uncertain = sheet.rows.some((row) => row.locationUncertain);
+  drawTable(
+    doc,
+    fillWidth(doc, [
+      { header: 'Anzahl und Nummern der Völker', width: 110 },
+      { header: 'Arzneimittel (Handelsname), Ch.-B.', width: 120 },
+      { header: 'a) Lieferant (Name, Anschrift), ggf. Tierarzt', width: 150 },
+      { header: 'b) Beleg für den Erwerb', width: 110 },
+      { header: 'Datum der Verabreichung, Dauer', width: 90 },
+      { header: 'Verabreichte Menge', width: 70 },
+      { header: 'Wartezeit (Tage)', width: 50 },
+      { header: 'Anwendende Person', width: 0 },
+    ]),
+    sheet.rows.map((row) => [
+      `${row.colonyCodes.length} Volk/Völker: ${row.colonyCodes.join(', ')}${row.locationUncertain ? ' *' : ''}`,
+      `${row.product}${row.batchNumber ? ` (Ch.-B. ${row.batchNumber})` : ''}`,
+      `${orMissing(row.supplier)}${row.prescribingVet ? `; Tierarzt: ${row.prescribingVet}` : ''}`,
+      orMissing(row.purchaseProof),
+      `${formatDay(row.date)}${row.endDate ? ` – ${formatDay(row.endDate)}` : ''}, ${row.durationDays} Tag(e)`,
+      orMissing(row.amount),
+      orMissing(row.withdrawalPeriodDays),
+      orDash(row.administeredBy),
+    ]),
+  );
+  doc.font('Helvetica').fontSize(7);
+  if (uncertain) {
+    doc.text(
+      '* Standort aus der heutigen Zuordnung ermittelt: das Volk wurde später umgesetzt, der Stand am Behandlungstag ist nicht erfasst. Bitte prüfen.',
+      PDF_MARGIN,
+    );
+  }
+  doc.text(
+    `"${MISSING}" = Pflichtangabe fehlt – bitte in der Behandlung nachtragen. Bestandsbuch und Erwerbsbelege 5 Jahre aufbewahren (Art. 108 Abs. 5 VO (EU) 2019/6).`,
+    PDF_MARGIN,
+  );
+}
+
+export function renderTreatmentLogPdf(log: TreatmentLog): Promise<Buffer> {
+  return new Promise((resolve, reject) => {
+    const doc = new PDFDocument({
+      size: 'A4',
+      layout: 'landscape',
+      margin: PDF_MARGIN,
+    });
+    const chunks: Buffer[] = [];
+    doc.on('data', (chunk: Buffer) => chunks.push(chunk));
+    doc.on('end', () => resolve(Buffer.concat(chunks)));
+    doc.on('error', reject);
+
+    if (log.sheets.length === 0) {
+      renderSheet(doc, log, null);
+    }
+    log.sheets.forEach((sheet, index) => {
+      if (index > 0) doc.addPage();
+      renderSheet(doc, log, sheet);
+    });
+    doc.end();
+  });
+}

ApiCore-Backend/src/extractions/dto/create-extraction.dto.ts

@@ -1,6 +1,7 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 import {
   ArrayMinSize,
+  ArrayUnique,
   IsArray,
   IsDateString,
   IsNumber,
@@ -18,6 +19,7 @@ export class CreateExtractionDto {
   @ApiProperty({ type: [String] })
   @IsArray()
   @ArrayMinSize(1)
+  @ArrayUnique()
   @IsString({ each: true })
   harvestIds!: string[];
 

ApiCore-Backend/src/feedings/feedings.controller.ts

@@ -6,6 +6,7 @@ import type { AuthenticatedUser } from '../auth/types/authenticated-user';
 import { CreateFeedingDto } from './dto/create-feeding.dto';
 import { UpdateFeedingDto } from './dto/update-feeding.dto';
 import { FeedingsService } from './feedings.service';
+import { Idempotent } from '../common/idempotency/idempotent.decorator';
 
 @ApiTags('feedings')
 @ApiBearerAuth()
@@ -26,6 +27,7 @@ export class FeedingsController {
   }
 
   @RequirePermission('feedings:create')
+  @Idempotent()
   @Post()
   create(
     @Body() dto: CreateFeedingDto,

ApiCore-Backend/src/feedings/feedings.module.ts

@@ -1,9 +1,11 @@
 import { Module } from '@nestjs/common';
+import { AutomationModule } from '../automation/automation.module';
 import { FeedingsController } from './feedings.controller';
 import { ColonyFeedingsController } from './colony-feedings.controller';
 import { FeedingsService } from './feedings.service';
 
 @Module({
+  imports: [AutomationModule],
   controllers: [FeedingsController, ColonyFeedingsController],
   providers: [FeedingsService],
   exports: [FeedingsService],

ApiCore-Backend/src/feedings/feedings.service.spec.ts

@@ -1,4 +1,5 @@
 import { NotFoundException } from '@nestjs/common';
+import { AutomationService } from '../automation/automation.service';
 import { FeedingsService } from './feedings.service';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
@@ -35,6 +36,7 @@ describe('FeedingsService', () => {
       prisma as unknown as PrismaService,
       auditLog as unknown as AuditLogService,
       calendarSync as unknown as CalendarSyncService,
+      { evaluateFeeding: jest.fn() } as unknown as AutomationService,
     );
   });
 

ApiCore-Backend/src/feedings/feedings.service.ts

@@ -1,4 +1,5 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
+import { AutomationService } from '../automation/automation.service';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
 import { CalendarSyncService } from '../calendar-sync/calendar-sync.service';
@@ -17,6 +18,7 @@ export class FeedingsService {
     private readonly prisma: PrismaService,
     private readonly auditLog: AuditLogService,
     private readonly calendarSync: CalendarSyncService,
+    private readonly automation: AutomationService,
   ) {}
 
   async findAll(): Promise<Feeding[]> {
@@ -62,6 +64,7 @@ export class FeedingsService {
       afterData: feeding,
     });
     await this.calendarSync.enqueue('FEEDING', feeding.id);
+    await this.automation.evaluateFeeding(feeding);
     return feeding;
   }
 

ApiCore-Backend/src/harvests/dto/create-harvest.dto.ts

@@ -1,6 +1,7 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 import {
   ArrayMinSize,
+  ArrayUnique,
   IsArray,
   IsDateString,
   IsInt,
@@ -22,6 +23,7 @@ export class CreateHarvestDto {
   @ApiProperty({ type: [String] })
   @IsArray()
   @ArrayMinSize(1)
+  @ArrayUnique()
   @IsString({ each: true })
   colonyIds!: string[];
 

ApiCore-Backend/src/harvests/harvests.controller.ts

@@ -6,6 +6,7 @@ import type { AuthenticatedUser } from '../auth/types/authenticated-user';
 import { CreateHarvestDto } from './dto/create-harvest.dto';
 import { UpdateHarvestDto } from './dto/update-harvest.dto';
 import { HarvestsService } from './harvests.service';
+import { Idempotent } from '../common/idempotency/idempotent.decorator';
 
 @ApiTags('harvests')
 @ApiBearerAuth()
@@ -26,6 +27,7 @@ export class HarvestsController {
   }
 
   @RequirePermission('harvests:create')
+  @Idempotent()
   @Post()
   create(
     @Body() dto: CreateHarvestDto,

ApiCore-Backend/src/harvests/harvests.service.ts

@@ -55,7 +55,20 @@ export class HarvestsService {
     }
   }
 
+  // Net weight is gross weight minus frames and boxes - it cannot be larger.
+  private assertWeightsPlausible(
+    grossWeight: number | null | undefined,
+    netWeight: number | null | undefined,
+  ): void {
+    if (grossWeight != null && netWeight != null && netWeight > grossWeight) {
+      throw new BadRequestException(
+        'Das Nettogewicht kann nicht größer als das Bruttogewicht sein',
+      );
+    }
+  }
+
   async create(dto: CreateHarvestDto, actingUserId: string) {
+    this.assertWeightsPlausible(dto.grossWeight, dto.netWeight);
     await this.assertColoniesExist(dto.colonyIds);
     const harvest = await this.prisma.$transaction(async (tx) => {
       const created = await tx.harvest.create({
@@ -93,6 +106,10 @@ export class HarvestsService {
 
   async update(id: string, dto: UpdateHarvestDto, actingUserId: string) {
     const before = await this.findById(id);
+    this.assertWeightsPlausible(
+      dto.grossWeight !== undefined ? dto.grossWeight : before.grossWeight,
+      dto.netWeight !== undefined ? dto.netWeight : before.netWeight,
+    );
     const { colonyIds, ...scalarFields } = dto;
     if (colonyIds) {
       await this.assertColoniesExist(colonyIds);

ApiCore-Backend/src/inspections/dto/create-inspection.dto.ts

@@ -6,6 +6,8 @@ import {
   IsNumber,
   IsOptional,
   IsString,
+  Max,
+  Min,
 } from 'class-validator';
 
 export class CreateInspectionDto {
@@ -30,6 +32,7 @@ export class CreateInspectionDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(0)
   colonyStrength?: number;
 
   @ApiPropertyOptional()
@@ -40,6 +43,8 @@ export class CreateInspectionDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(1)
+  @Max(5)
   broodPattern?: number;
 
   @ApiPropertyOptional()
@@ -70,16 +75,22 @@ export class CreateInspectionDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(1)
+  @Max(5)
   swarmMood?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(1)
+  @Max(5)
   gentleness?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(1)
+  @Max(5)
   combBehavior?: number;
 
   @ApiPropertyOptional()

ApiCore-Backend/src/inspections/inspections.controller.ts

@@ -7,6 +7,7 @@ import { CreateInspectionDto } from './dto/create-inspection.dto';
 import { CreateTaskFromInspectionDto } from './dto/create-task-from-inspection.dto';
 import { UpdateInspectionDto } from './dto/update-inspection.dto';
 import { InspectionsService } from './inspections.service';
+import { Idempotent } from '../common/idempotency/idempotent.decorator';
 
 @ApiTags('inspections')
 @ApiBearerAuth()
@@ -27,6 +28,7 @@ export class InspectionsController {
   }
 
   @RequirePermission('inspections:create')
+  @Idempotent()
   @Post()
   create(
     @Body() dto: CreateInspectionDto,

ApiCore-Backend/src/inspections/inspections.service.ts

@@ -80,7 +80,7 @@ export class InspectionsService {
     actingUserId: string,
   ): Promise<Task> {
     const inspection = await this.findById(id);
-    return this.prisma.task.create({
+    const task = await this.prisma.task.create({
       data: {
         title: dto.title,
         description: dto.description,
@@ -93,5 +93,19 @@ export class InspectionsService {
         sourceInspectionId: inspection.id,
       },
     });
+    // Same trail as a task created on the task page: audit entry, webhook
+    // and calendar entry must not depend on where the task was started.
+    await this.auditLog.record({
+      entityType: 'Task',
+      entityId: task.id,
+      action: 'CREATE',
+      userId: actingUserId,
+      afterData: task,
+    });
+    await this.webhooks.dispatch('task.created', task);
+    if (task.dueDate) {
+      await this.calendarSync.enqueue('TASK', task.id);
+    }
+    return task;
   }
 }

ApiCore-Backend/src/label-templates/crop-marks.spec.ts

@@ -0,0 +1,78 @@
+import { computeCropMarks, CropMarkGrid, CropMarkLine } from './crop-marks';
+
+// 2 x 2 labels of 90 x 35 mm, 10 mm margin, 2 mm gaps on A4.
+const GRID: CropMarkGrid = {
+  pageWidthMm: 210,
+  pageHeightMm: 297,
+  columns: 2,
+  rows: 2,
+  slotWidthMm: 90,
+  slotHeightMm: 35,
+  marginLeftMm: 10,
+  marginTopMm: 10,
+  gapXMm: 2,
+  gapYMm: 2,
+};
+
+const vertical = (lines: CropMarkLine[]) =>
+  lines.filter((line) => line.x1 === line.x2);
+const horizontal = (lines: CropMarkLine[]) =>
+  lines.filter((line) => line.y1 === line.y2);
+
+describe('computeCropMarks', () => {
+  it('marks both edges of every column and row, at both ends of each cut', () => {
+    const lines = computeCropMarks(GRID);
+
+    // Columns: 10|100 and 102|192 -> 4 cuts, marked at top and bottom.
+    const xs = [...new Set(vertical(lines).map((line) => line.x1))];
+    expect(xs).toEqual([10, 100, 102, 192]);
+    expect(vertical(lines)).toHaveLength(8);
+    // Rows: 10|45 and 47|82 -> 4 cuts, marked left and right.
+    const ys = [...new Set(horizontal(lines).map((line) => line.y1))];
+    expect(ys).toEqual([10, 45, 47, 82]);
+    expect(horizontal(lines)).toHaveLength(8);
+  });
+
+  it('keeps every mark in the margin, never on a label', () => {
+    const lines = computeCropMarks(GRID);
+    const gridRight = 192;
+    const gridBottom = 82;
+
+    for (const line of vertical(lines)) {
+      const inTopMargin = line.y2 <= GRID.marginTopMm - 1;
+      const inBottomMargin = line.y1 >= gridBottom + 1;
+      expect(inTopMargin || inBottomMargin).toBe(true);
+    }
+    for (const line of horizontal(lines)) {
+      const inLeftMargin = line.x2 <= GRID.marginLeftMm - 1;
+      const inRightMargin = line.x1 >= gridRight + 1;
+      expect(inLeftMargin || inRightMargin).toBe(true);
+    }
+  });
+
+  it('stays clear of the unprintable paper edge', () => {
+    const lines = computeCropMarks({
+      ...GRID,
+      marginLeftMm: 5,
+      marginTopMm: 5,
+    });
+    for (const line of lines) {
+      expect(
+        Math.min(line.x1, line.x2, line.y1, line.y2),
+      ).toBeGreaterThanOrEqual(2);
+    }
+  });
+
+  it('draws one cut, not two, where labels touch without a gap', () => {
+    const lines = computeCropMarks({ ...GRID, gapXMm: 0 });
+    const xs = [...new Set(vertical(lines).map((line) => line.x1))];
+    expect(xs).toEqual([10, 100, 190]);
+  });
+
+  it('leaves out marks when the margin is too narrow to print them', () => {
+    const lines = computeCropMarks({ ...GRID, marginTopMm: 2 });
+    // No room above the grid: top marks disappear, bottom marks remain.
+    expect(vertical(lines).every((line) => line.y1 > 10)).toBe(true);
+    expect(vertical(lines)).toHaveLength(4);
+  });
+});

ApiCore-Backend/src/label-templates/crop-marks.ts

@@ -0,0 +1,123 @@
+/**
+ * Cut marks for trimming a printed label sheet with a guillotine / lever
+ * paper cutter: short hairlines in the sheet margin, outside every label,
+ * one at each end of every cut line. Laying both ends of a mark against the
+ * cutter's ruler lines the blade up with the label edge.
+ *
+ * All values in millimetres on an A4 page (0,0 = top left).
+ */
+
+/** How far a mark stays away from the label edge it points at. */
+export const CROP_MARK_GAP_MM = 1;
+/** Mark length. Short on purpose - it lives in the margin only. */
+export const CROP_MARK_LENGTH_MM = 4;
+/** Most printers cannot print closer to the paper edge than this. */
+export const CROP_MARK_PAGE_INSET_MM = 2;
+/** A mark shorter than this is not worth printing (too little margin). */
+const MIN_MARK_LENGTH_MM = 1.5;
+
+export interface CropMarkGrid {
+  pageWidthMm: number;
+  pageHeightMm: number;
+  columns: number;
+  rows: number;
+  slotWidthMm: number;
+  slotHeightMm: number;
+  marginLeftMm: number;
+  marginTopMm: number;
+  gapXMm: number;
+  gapYMm: number;
+}
+
+export interface CropMarkLine {
+  x1: number;
+  y1: number;
+  x2: number;
+  y2: number;
+}
+
+/** Cut positions along one axis; edges closer than 0.05 mm are one cut. */
+function cutPositions(
+  start: number,
+  count: number,
+  size: number,
+  gap: number,
+): number[] {
+  const positions: number[] = [];
+  for (let i = 0; i < count; i++) {
+    const from = start + i * (size + gap);
+    positions.push(from, from + size);
+  }
+  return positions
+    .sort((a, b) => a - b)
+    .filter(
+      (value, index, all) => index === 0 || value - all[index - 1] > 0.05,
+    );
+}
+
+/**
+ * The segment of a mark in the margin between the page edge and the grid,
+ * or null when the margin is too narrow to print one.
+ */
+function marginSegment(
+  gridEdge: number,
+  pageEdge: number,
+  towardsPageStart: boolean,
+): [number, number] | null {
+  if (towardsPageStart) {
+    const end = gridEdge - CROP_MARK_GAP_MM;
+    const start = Math.max(end - CROP_MARK_LENGTH_MM, CROP_MARK_PAGE_INSET_MM);
+    return end - start >= MIN_MARK_LENGTH_MM ? [start, end] : null;
+  }
+  const start = gridEdge + CROP_MARK_GAP_MM;
+  const end = Math.min(
+    start + CROP_MARK_LENGTH_MM,
+    pageEdge - CROP_MARK_PAGE_INSET_MM,
+  );
+  return end - start >= MIN_MARK_LENGTH_MM ? [start, end] : null;
+}
+
+export function computeCropMarks(grid: CropMarkGrid): CropMarkLine[] {
+  if (grid.columns < 1 || grid.rows < 1) {
+    return [];
+  }
+  const gridLeft = grid.marginLeftMm;
+  const gridTop = grid.marginTopMm;
+  const gridRight =
+    gridLeft +
+    grid.columns * grid.slotWidthMm +
+    (grid.columns - 1) * grid.gapXMm;
+  const gridBottom =
+    gridTop + grid.rows * grid.slotHeightMm + (grid.rows - 1) * grid.gapYMm;
+
+  const verticalCuts = cutPositions(
+    gridLeft,
+    grid.columns,
+    grid.slotWidthMm,
+    grid.gapXMm,
+  );
+  const horizontalCuts = cutPositions(
+    gridTop,
+    grid.rows,
+    grid.slotHeightMm,
+    grid.gapYMm,
+  );
+
+  const top = marginSegment(gridTop, grid.pageHeightMm, true);
+  const bottom = marginSegment(gridBottom, grid.pageHeightMm, false);
+  const left = marginSegment(gridLeft, grid.pageWidthMm, true);
+  const right = marginSegment(gridRight, grid.pageWidthMm, false);
+
+  const lines: CropMarkLine[] = [];
+  for (const x of verticalCuts) {
+    for (const segment of [top, bottom]) {
+      if (segment) lines.push({ x1: x, y1: segment[0], x2: x, y2: segment[1] });
+    }
+  }
+  for (const y of horizontalCuts) {
+    for (const segment of [left, right]) {
+      if (segment) lines.push({ x1: segment[0], y1: y, x2: segment[1], y2: y });
+    }
+  }
+  return lines;
+}

ApiCore-Backend/src/label-templates/dto/create-label-template.dto.ts

@@ -78,6 +78,14 @@ export class CreateLabelTemplateDto {
   @Min(0)
   gapYMm?: number;
 
+  @ApiPropertyOptional({
+    description:
+      'Schnittmarken im Blattrand drucken (zum Schneiden mit dem Papierschneider)',
+  })
+  @IsOptional()
+  @IsBoolean()
+  cropMarks?: boolean;
+
   @ApiPropertyOptional()
   @IsOptional()
   @IsBoolean()