feat(frontend): EmptyState statt Fließtext in verschachtelten Listen

Ersetzt den bisherigen reinen Fließtext ("Noch keine X dokumentiert.")
durch die gemeinsame EmptyState-Komponente (Icon, Titel, Beschreibung)
in allen verschachtelten Listen auf den Volk- und Königin-Detailseiten:
Fütterung, Behandlungen, Varroa, Durchsichten, Historie (Volk und
Königin), Bewertungen und Honigmessungen.

Rundet den bereits umgesetzten EmptyState-Look der Hauptlistenseiten
konsistent auf die Detailseiten-Unterkarten ab.

ApiCore-Frontend/src/app/(app)/colonies/[id]/colony-feedings.tsx

@@ -1,9 +1,11 @@
 "use client";
 
 import Link from "next/link";
+import { Utensils } from "lucide-react";
 import { useQuery } from "@tanstack/react-query";
 import { fetchColonyFeedings, fetchColonyFeedingsSummary } from "@/lib/feedings/api";
 import { Button } from "@/components/ui/button";
+import { EmptyState } from "@/components/empty-state";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 
 export function ColonyFeedingsCard({ colonyId }: { colonyId: string }) {
@@ -39,7 +41,11 @@ export function ColonyFeedingsCard({ colonyId }: { colonyId: string }) {
         ) : null}
         {isLoading ? <p className="text-muted-foreground">Lädt…</p> : null}
         {!isLoading && (!feedings || feedings.length === 0) ? (
-          <p className="text-muted-foreground">Noch keine Fütterung dokumentiert.</p>
+          <EmptyState
+            icon={Utensils}
+            title="Noch keine Fütterung"
+            description="Erfasse die erste Fütterung für dieses Volk."
+          />
         ) : null}
         {feedings?.map((feeding) => (
           <div key={feeding.id} className="rounded-md border p-3">

ApiCore-Frontend/src/app/(app)/colonies/[id]/colony-history.tsx

@@ -1,7 +1,9 @@
 "use client";
 
+import { History } from "lucide-react";
 import { useQuery } from "@tanstack/react-query";
 import { fetchColonyHistory } from "@/lib/colonies/api";
+import { EmptyState } from "@/components/empty-state";
 import {
   Card,
   CardContent,
@@ -31,7 +33,11 @@ export function ColonyHistoryCard({ colonyId }: { colonyId: string }) {
       </CardHeader>
       <CardContent className="flex flex-col gap-3 text-sm">
         {!hasHistory ? (
-          <p className="text-muted-foreground">Noch keine Historie vorhanden.</p>
+          <EmptyState
+            icon={History}
+            title="Noch keine Historie"
+            description="Standortwechsel und Ableger erscheinen hier."
+          />
         ) : null}
         {history.apiaryHistory.map((entry) => (
           <p key={entry.id}>

ApiCore-Frontend/src/app/(app)/colonies/[id]/colony-inspections.tsx

@@ -1,9 +1,11 @@
 "use client";
 
 import Link from "next/link";
+import { ClipboardCheck } from "lucide-react";
 import { useQuery } from "@tanstack/react-query";
 import { fetchColonyInspections } from "@/lib/inspections/api";
 import { Button } from "@/components/ui/button";
+import { EmptyState } from "@/components/empty-state";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 
 export function ColonyInspectionsCard({ colonyId }: { colonyId: string }) {
@@ -27,7 +29,11 @@ export function ColonyInspectionsCard({ colonyId }: { colonyId: string }) {
       <CardContent className="flex flex-col gap-3 text-sm">
         {isLoading ? <p className="text-muted-foreground">Lädt…</p> : null}
         {!isLoading && (!inspections || inspections.length === 0) ? (
-          <p className="text-muted-foreground">Noch keine Durchsicht dokumentiert.</p>
+          <EmptyState
+            icon={ClipboardCheck}
+            title="Noch keine Durchsicht"
+            description="Dokumentiere die erste Durchsicht für dieses Volk."
+          />
         ) : null}
         {inspections?.map((inspection) => (
           <div key={inspection.id} className="rounded-md border p-3">

ApiCore-Frontend/src/app/(app)/colonies/[id]/colony-treatments.tsx

@@ -1,9 +1,11 @@
 "use client";
 
 import Link from "next/link";
+import { Syringe } from "lucide-react";
 import { useQuery } from "@tanstack/react-query";
 import { fetchColonyTreatments } from "@/lib/treatments/api";
 import { Button } from "@/components/ui/button";
+import { EmptyState } from "@/components/empty-state";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 
 export function ColonyTreatmentsCard({ colonyId }: { colonyId: string }) {
@@ -27,7 +29,11 @@ export function ColonyTreatmentsCard({ colonyId }: { colonyId: string }) {
       <CardContent className="flex flex-col gap-3 text-sm">
         {isLoading ? <p className="text-muted-foreground">Lädt…</p> : null}
         {!isLoading && (!treatments || treatments.length === 0) ? (
-          <p className="text-muted-foreground">Noch keine Behandlung dokumentiert.</p>
+          <EmptyState
+            icon={Syringe}
+            title="Noch keine Behandlung"
+            description="Dokumentiere die erste Behandlung für dieses Volk."
+          />
         ) : null}
         {treatments?.map((treatment) => (
           <div key={treatment.id} className="rounded-md border p-3">

ApiCore-Frontend/src/app/(app)/colonies/[id]/colony-varroa.tsx

@@ -1,9 +1,11 @@
 "use client";
 
 import Link from "next/link";
+import { Bug } from "lucide-react";
 import { useQuery } from "@tanstack/react-query";
 import { fetchColonyVarroaMeasurements } from "@/lib/varroa/api";
 import { Button } from "@/components/ui/button";
+import { EmptyState } from "@/components/empty-state";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 
 const CHART_WIDTH = 280;
@@ -64,7 +66,11 @@ export function ColonyVarroaCard({ colonyId }: { colonyId: string }) {
       <CardContent className="flex flex-col gap-3 text-sm">
         {isLoading ? <p className="text-muted-foreground">Lädt…</p> : null}
         {!isLoading && (!measurements || measurements.length === 0) ? (
-          <p className="text-muted-foreground">Noch keine Varroamessung dokumentiert.</p>
+          <EmptyState
+            icon={Bug}
+            title="Noch keine Varroamessung"
+            description="Erfasse die erste Messung für dieses Volk."
+          />
         ) : null}
         <VarroaTrendChart values={values} />
         {measurements?.map((measurement) => (

ApiCore-Frontend/src/app/(app)/honey-batches/[id]/page.tsx

@@ -2,11 +2,12 @@
 
 import Link from "next/link";
 import { useParams } from "next/navigation";
-import { Droplet } from "lucide-react";
+import { Droplet, FlaskConical } from "lucide-react";
 import { useMutation, useQuery } from "@tanstack/react-query";
 import { fetchHoneyBatch, fetchHoneyBatchTraceability } from "@/lib/honey-batches/api";
 import { exportHoneyBatchTraceabilityPdf } from "@/lib/export/api";
 import { QrCodeDialog } from "@/components/qr-code-dialog";
+import { EmptyState } from "@/components/empty-state";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
@@ -78,7 +79,11 @@ export default function HoneyBatchDetailPage() {
         </CardHeader>
         <CardContent className="flex flex-col gap-3 text-sm">
           {honeyBatch.measurements.length === 0 ? (
-            <p className="text-muted-foreground">Noch keine Messung dokumentiert.</p>
+            <EmptyState
+              icon={FlaskConical}
+              title="Noch keine Messung"
+              description="Erfasse die erste Wassergehalt-Messung für diese Charge."
+            />
           ) : null}
           {honeyBatch.measurements.map((measurement) => (
             <div key={measurement.id} className="rounded-md border p-3">

ApiCore-Frontend/src/app/(app)/queens/[id]/queen-evaluations.tsx

@@ -1,12 +1,14 @@
 "use client";
 
 import { FormEvent, useState } from "react";
+import { Star } from "lucide-react";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { addQueenEvaluation, fetchQueenEvaluations } from "@/lib/queens/api";
 import { CreateQueenEvaluationInput } from "@/lib/queens/types";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
+import { EmptyState } from "@/components/empty-state";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import {
   Dialog,
@@ -131,7 +133,11 @@ export function QueenEvaluationsCard({ queenId }: { queenId: string }) {
       <CardContent className="flex flex-col gap-3 text-sm">
         {isLoading ? <p className="text-muted-foreground">Lädt…</p> : null}
         {!isLoading && (!evaluations || evaluations.length === 0) ? (
-          <p className="text-muted-foreground">Noch keine Bewertung dokumentiert.</p>
+          <EmptyState
+            icon={Star}
+            title="Noch keine Bewertung"
+            description="Erfasse die erste Bewertung für diese Königin."
+          />
         ) : null}
         {evaluations?.map((evaluation) => (
           <div key={evaluation.id} className="rounded-md border p-3">

ApiCore-Frontend/src/app/(app)/queens/[id]/queen-history.tsx

@@ -1,7 +1,9 @@
 "use client";
 
+import { History } from "lucide-react";
 import { useQuery } from "@tanstack/react-query";
 import { fetchQueenHistory } from "@/lib/queens/api";
+import { EmptyState } from "@/components/empty-state";
 import {
   Card,
   CardContent,
@@ -26,7 +28,11 @@ export function QueenHistoryCard({ queenId }: { queenId: string }) {
       </CardHeader>
       <CardContent className="flex flex-col gap-3 text-sm">
         {history.length === 0 ? (
-          <p className="text-muted-foreground">Noch keine Historie vorhanden.</p>
+          <EmptyState
+            icon={History}
+            title="Noch keine Historie"
+            description="Volkszuordnungen erscheinen hier."
+          />
         ) : null}
         {history.map((entry) => (
           <p key={entry.id}>