feat: add website social link, fix herkunft origin display, GUI backup schedule, and format-based batch numbering

- SiteSettings gains websiteUrl (e.g. online shop link) alongside the
  existing social links, editable in Verwaltung > Automatisierung.
- /herkunft/[lot] now shows the apiary's Standort instead of its internal
  Name (so multiple apiaries at one location read as one origin), adds
  small icons per social link, and surfaces previously-fetched-but-unused
  data (Honigsorte, Abfülldatum, stat cards) to make the page a richer
  customer-facing info page.
- Backup schedule (path/cron/retention) is now also configurable via the
  GUI (Verwaltung > Backup), stored in a new BackupSettings singleton;
  an env var always wins over the GUI value per field, and the scheduler
  reloads its cron job live when GUI settings change.
- New Automatisierung rules let an admin define a format (e.g.
  "WH-{YYYY}-{SEQ:4}") that auto-generates HoneyBatch.batchNumber and
  BottlingBatch.lotNumber on creation, with an atomic per-rule sequence
  counter and a manual reset. Manual entry still works when the rule is
  inactive.

ApiCore-Frontend/src/lib/backup/api.ts

@@ -1,5 +1,10 @@
 import { apiFetch, apiFetchBlob, apiFetchFormData, BlobDownload } from "@/lib/auth/api-client";
-import { BackupImportSummary, BackupScheduleStatus } from "./types";
+import {
+  BackupImportSummary,
+  BackupScheduleStatus,
+  BackupSettings,
+  UpdateBackupSettingsInput,
+} from "./types";
 
 export function exportBackup(): Promise<BlobDownload> {
   return apiFetchBlob("/backup/export", "apicore-backup.json");
@@ -20,3 +25,16 @@ export function runBackupNow(): Promise<{ filePath: string }> {
     method: "POST",
   });
 }
+
+export function getBackupSettings(): Promise<BackupSettings> {
+  return apiFetch<BackupSettings>("/backup/settings");
+}
+
+export function updateBackupSettings(
+  input: UpdateBackupSettingsInput,
+): Promise<BackupSettings> {
+  return apiFetch<BackupSettings>("/backup/settings", {
+    method: "PATCH",
+    body: JSON.stringify(input),
+  });
+}

ApiCore-Frontend/src/lib/backup/types.ts

@@ -8,4 +8,23 @@ export interface BackupScheduleStatus {
   cronSchedule: string | null;
   retentionCount: number | null;
   lastRunAt: string | null;
+  envOverrides: {
+    storagePath: boolean;
+    cronSchedule: boolean;
+    retentionCount: boolean;
+  };
+}
+
+export interface BackupSettings {
+  id: string;
+  storagePath: string | null;
+  cronSchedule: string | null;
+  retentionCount: number | null;
+  updatedAt: string;
+}
+
+export interface UpdateBackupSettingsInput {
+  storagePath?: string;
+  cronSchedule?: string;
+  retentionCount?: number;
 }