diff --git a/docs/handoff.md b/docs/handoff.md
index f74522b..5894c4f 100644
--- a/docs/handoff.md
+++ b/docs/handoff.md
@@ -40,9 +40,9 @@ Private Flutter-App (iOS+Android) zur Pflanzenpflege für Haushalt + Pflanzen-Si
 
 **Erweiterung Untersuchungshistorie (2026-07-23):** Jede Diagnose wird automatisch unter `households/{id}/plants/{id}/diagnoses` gespeichert (healthy, matchesSpecies, Texte, `createdAt` Server-Timestamp). Im Pflanzen-Detail unter dem Untersuchen-Button: Liste „Untersuchungen" (neueste zuerst, Ampel-Icon + Kurzbefund + Datum), Tipp öffnet dasselbe Ergebnis-Sheet inkl. „Untersucht am …". Volle Mitglieder können Einträge löschen (Bestätigungsdialog); Sitter dürfen speichern/lesen, Einträge sind nachträglich unveränderbar (Rules). Neuer Widget-Test navigiert bis ins Sheet — alle 11 Tests grün.
 
-**Noch zu tun (Nutzer):**
-1. **Rules-Deploy** (neue diagnoses-Regeln; ohne sie schlägt das Speichern der Historie still fehl): `firebase deploy --only firestore --project leaf-it-to-me-app`
-2. App neu bauen, Untersuchung durchführen → Eintrag erscheint in „Untersuchungen", antippen zeigt den vollen Text, Löschen fragt nach.
+Rules deployt (2026-07-23). **Auf Nutzerwunsch ausgelagert:** Die Historie liegt jetzt auf einer eigenen Seite (`/plants/:id/diagnoses`, `PlantDiagnosesScreen`) statt inline im Detail; im Detail führt der Button „Frühere Untersuchungen" dorthin (deaktiviert/ausgegraut, solange keine Untersuchungen existieren). Das Ergebnis-Sheet ist in `diagnosis_sheet.dart` ausgelagert und wird von Detail (frische Untersuchung) und Historie-Seite gemeinsam genutzt. 12 Tests grün (neu: Button-deaktiviert-Test).
+
+**Noch zu tun (Nutzer):** App neu bauen und die ausgelagerte Historie-Seite einmal durchklicken (Button → Liste → Eintrag → Sheet; Löschen).
 
 **Danach V3 weiter:** Stellplatz-Bewertung (Zwei-Ebenen-Konzept), Umtopf-Erinnerungen.
 
diff --git a/lib/core/router/app_router.dart b/lib/core/router/app_router.dart
index ed24662..9fc76a3 100644
--- a/lib/core/router/app_router.dart
+++ b/lib/core/router/app_router.dart
@@ -9,6 +9,7 @@ import '../../features/household/presentation/household_screen.dart';
 import '../../features/locations/presentation/locations_screen.dart';
 import '../../features/plants/domain/plant.dart';
 import '../../features/plants/presentation/plant_detail_screen.dart';
+import '../../features/plants/presentation/plant_diagnoses_screen.dart';
 import '../../features/plants/presentation/plant_form_screen.dart';
 import '../../features/plants/presentation/plants_screen.dart';
 import '../../features/settings/presentation/settings_screen.dart';
@@ -26,6 +27,10 @@ abstract final class AppRoutes {
   static const locations = '/locations';
   static const household = '/household';
   static const settings = '/settings';
+
+  /// Untersuchungs-Seite einer Pflanze.
+  static String plantDiagnoses(String plantId) =>
+      '/plants/$plantId/diagnoses';
 }
 
 /// Übersetzt einen Stream in ein Listenable, damit der Router bei
@@ -86,6 +91,11 @@ final appRouterProvider = Provider<GoRouter>((ref) {
         builder: (context, state) =>
             PlantDetailScreen(plantId: state.pathParameters['id']!),
       ),
+      GoRoute(
+        path: '/plants/:id/diagnoses',
+        builder: (context, state) =>
+            PlantDiagnosesScreen(plantId: state.pathParameters['id']!),
+      ),
       GoRoute(
         path: AppRoutes.locations,
         builder: (context, state) => const LocationsScreen(),
diff --git a/lib/features/plants/presentation/diagnosis_sheet.dart b/lib/features/plants/presentation/diagnosis_sheet.dart
new file mode 100644
index 0000000..7037922
--- /dev/null
+++ b/lib/features/plants/presentation/diagnosis_sheet.dart
@@ -0,0 +1,127 @@
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+
+import '../../../l10n/generated/app_localizations.dart';
+import '../data/plant_diagnosis_service.dart';
+
+/// Zeigt das Diagnose-Ergebnis als scrollbares Bottom-Sheet — sowohl für
+/// eine frische Untersuchung (Detail-Screen) als auch für Einträge aus der
+/// Untersuchungs-Seite ([createdAt] gesetzt).
+Future<void> showDiagnosisSheet(
+  BuildContext context, {
+  required DiagnosisResult result,
+  required String plantNickname,
+  DateTime? createdAt,
+}) {
+  final l10n = AppLocalizations.of(context);
+  final locale = Localizations.localeOf(context).toString();
+  return showModalBottomSheet<void>(
+    context: context,
+    isScrollControlled: true,
+    builder: (sheetContext) {
+      final theme = Theme.of(sheetContext);
+      final healthyColor = theme.brightness == Brightness.dark
+          ? Colors.green.shade300
+          : Colors.green.shade700;
+      return DraggableScrollableSheet(
+        expand: false,
+        initialChildSize: 0.6,
+        maxChildSize: 0.95,
+        builder: (context, scrollController) => ListView(
+          controller: scrollController,
+          padding: const EdgeInsets.all(24),
+          children: [
+            if (!result.matchesSpecies) ...[
+              Container(
+                padding: const EdgeInsets.all(12),
+                decoration: BoxDecoration(
+                  color: theme.colorScheme.errorContainer,
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                child: Row(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Icon(
+                      Icons.swap_horiz,
+                      color: theme.colorScheme.onErrorContainer,
+                    ),
+                    const SizedBox(width: 12),
+                    Expanded(
+                      child: Text(
+                        l10n.diagnosisSpeciesMismatch(plantNickname),
+                        style: theme.textTheme.bodyMedium?.copyWith(
+                          color: theme.colorScheme.onErrorContainer,
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+              const SizedBox(height: 16),
+            ],
+            Row(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Icon(
+                  result.healthy
+                      ? Icons.check_circle
+                      : Icons.warning_amber_rounded,
+                  size: 32,
+                  color:
+                      result.healthy ? healthyColor : theme.colorScheme.error,
+                ),
+                const SizedBox(width: 12),
+                Expanded(
+                  child: Text(
+                    result.summary,
+                    style: theme.textTheme.titleLarge,
+                  ),
+                ),
+              ],
+            ),
+            if (createdAt != null) ...[
+              const SizedBox(height: 8),
+              Text(
+                l10n.diagnosisDate(
+                  DateFormat('d. MMMM y, HH:mm', locale).format(createdAt),
+                ),
+                style: theme.textTheme.bodySmall?.copyWith(
+                  color: theme.colorScheme.onSurfaceVariant,
+                ),
+              ),
+            ],
+            if (result.details.isNotEmpty) ...[
+              const SizedBox(height: 16),
+              Text(result.details, style: theme.textTheme.bodyLarge),
+            ],
+            if (result.treatment.isNotEmpty) ...[
+              const SizedBox(height: 20),
+              Text(
+                l10n.diagnosisTreatmentTitle,
+                style: theme.textTheme.titleMedium,
+              ),
+              const SizedBox(height: 4),
+              Text(result.treatment, style: theme.textTheme.bodyLarge),
+            ],
+            if (result.prevention.isNotEmpty) ...[
+              const SizedBox(height: 20),
+              Text(
+                l10n.diagnosisPreventionTitle,
+                style: theme.textTheme.titleMedium,
+              ),
+              const SizedBox(height: 4),
+              Text(result.prevention, style: theme.textTheme.bodyLarge),
+            ],
+            const SizedBox(height: 16),
+            Text(
+              l10n.diagnosisDisclaimer,
+              style: theme.textTheme.bodySmall?.copyWith(
+                color: theme.colorScheme.onSurfaceVariant,
+              ),
+            ),
+          ],
+        ),
+      );
+    },
+  );
+}
diff --git a/lib/features/plants/presentation/plant_detail_screen.dart b/lib/features/plants/presentation/plant_detail_screen.dart
index dbaa5eb..c4b3cdd 100644
--- a/lib/features/plants/presentation/plant_detail_screen.dart
+++ b/lib/features/plants/presentation/plant_detail_screen.dart
@@ -13,6 +13,7 @@ import '../../locations/data/locations_provider.dart';
 import '../data/plant_diagnosis_service.dart';
 import '../data/plants_provider.dart';
 import '../domain/plant.dart';
+import 'diagnosis_sheet.dart';
 
 class PlantDetailScreen extends ConsumerWidget {
   const PlantDetailScreen({super.key, required this.plantId});
@@ -150,230 +151,12 @@ class PlantDetailScreen extends ConsumerWidget {
           ],
           const Divider(height: 32),
           _DiagnosisSection(plant: plant),
-          _DiagnosisHistory(plant: plant),
         ],
       ),
     );
   }
 }
 
-/// Zeigt das Diagnose-Ergebnis als scrollbares Bottom-Sheet — sowohl für
-/// eine frische Untersuchung als auch für Einträge aus der Historie
-/// ([createdAt] gesetzt).
-Future<void> _showDiagnosisSheet(
-  BuildContext context, {
-  required DiagnosisResult result,
-  required String plantNickname,
-  DateTime? createdAt,
-}) {
-  final l10n = AppLocalizations.of(context);
-  final locale = Localizations.localeOf(context).toString();
-  return showModalBottomSheet<void>(
-    context: context,
-    isScrollControlled: true,
-    builder: (sheetContext) {
-      final theme = Theme.of(sheetContext);
-      final healthyColor = theme.brightness == Brightness.dark
-          ? Colors.green.shade300
-          : Colors.green.shade700;
-      return DraggableScrollableSheet(
-        expand: false,
-        initialChildSize: 0.6,
-        maxChildSize: 0.95,
-        builder: (context, scrollController) => ListView(
-          controller: scrollController,
-          padding: const EdgeInsets.all(24),
-          children: [
-            if (!result.matchesSpecies) ...[
-              Container(
-                padding: const EdgeInsets.all(12),
-                decoration: BoxDecoration(
-                  color: theme.colorScheme.errorContainer,
-                  borderRadius: BorderRadius.circular(12),
-                ),
-                child: Row(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    Icon(
-                      Icons.swap_horiz,
-                      color: theme.colorScheme.onErrorContainer,
-                    ),
-                    const SizedBox(width: 12),
-                    Expanded(
-                      child: Text(
-                        l10n.diagnosisSpeciesMismatch(plantNickname),
-                        style: theme.textTheme.bodyMedium?.copyWith(
-                          color: theme.colorScheme.onErrorContainer,
-                        ),
-                      ),
-                    ),
-                  ],
-                ),
-              ),
-              const SizedBox(height: 16),
-            ],
-            Row(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Icon(
-                  result.healthy
-                      ? Icons.check_circle
-                      : Icons.warning_amber_rounded,
-                  size: 32,
-                  color:
-                      result.healthy ? healthyColor : theme.colorScheme.error,
-                ),
-                const SizedBox(width: 12),
-                Expanded(
-                  child: Text(
-                    result.summary,
-                    style: theme.textTheme.titleLarge,
-                  ),
-                ),
-              ],
-            ),
-            if (createdAt != null) ...[
-              const SizedBox(height: 8),
-              Text(
-                l10n.diagnosisDate(
-                  DateFormat('d. MMMM y, HH:mm', locale).format(createdAt),
-                ),
-                style: theme.textTheme.bodySmall?.copyWith(
-                  color: theme.colorScheme.onSurfaceVariant,
-                ),
-              ),
-            ],
-            if (result.details.isNotEmpty) ...[
-              const SizedBox(height: 16),
-              Text(result.details, style: theme.textTheme.bodyLarge),
-            ],
-            if (result.treatment.isNotEmpty) ...[
-              const SizedBox(height: 20),
-              Text(
-                l10n.diagnosisTreatmentTitle,
-                style: theme.textTheme.titleMedium,
-              ),
-              const SizedBox(height: 4),
-              Text(result.treatment, style: theme.textTheme.bodyLarge),
-            ],
-            if (result.prevention.isNotEmpty) ...[
-              const SizedBox(height: 20),
-              Text(
-                l10n.diagnosisPreventionTitle,
-                style: theme.textTheme.titleMedium,
-              ),
-              const SizedBox(height: 4),
-              Text(result.prevention, style: theme.textTheme.bodyLarge),
-            ],
-            const SizedBox(height: 16),
-            Text(
-              l10n.diagnosisDisclaimer,
-              style: theme.textTheme.bodySmall?.copyWith(
-                color: theme.colorScheme.onSurfaceVariant,
-              ),
-            ),
-          ],
-        ),
-      );
-    },
-  );
-}
-
-/// Liste der gespeicherten Untersuchungen dieser Pflanze (neueste zuerst).
-class _DiagnosisHistory extends ConsumerWidget {
-  const _DiagnosisHistory({required this.plant});
-
-  final Plant plant;
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    final l10n = AppLocalizations.of(context);
-    final theme = Theme.of(context);
-    final entries = ref.watch(plantDiagnosesProvider(plant.id)).value ?? [];
-    if (entries.isEmpty) return const SizedBox.shrink();
-
-    final canEdit = ref.watch(myRoleProvider) == HouseholdRole.member;
-    final locale = Localizations.localeOf(context).toString();
-    final dateFormat = DateFormat('d. MMMM y, HH:mm', locale);
-    final healthyColor = theme.brightness == Brightness.dark
-        ? Colors.green.shade300
-        : Colors.green.shade700;
-
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        const SizedBox(height: 24),
-        Text(l10n.diagnosisHistoryTitle, style: theme.textTheme.titleMedium),
-        for (final entry in entries)
-          ListTile(
-            contentPadding: EdgeInsets.zero,
-            leading: Icon(
-              entry.result.healthy
-                  ? Icons.check_circle
-                  : Icons.warning_amber_rounded,
-              color: entry.result.healthy
-                  ? healthyColor
-                  : theme.colorScheme.error,
-            ),
-            title: Text(
-              entry.result.summary,
-              maxLines: 2,
-              overflow: TextOverflow.ellipsis,
-            ),
-            subtitle: entry.createdAt != null
-                ? Text(dateFormat.format(entry.createdAt!))
-                : null,
-            trailing: canEdit
-                ? IconButton(
-                    icon: const Icon(Icons.delete_outline),
-                    tooltip: l10n.delete,
-                    onPressed: () => _confirmDelete(context, ref, entry),
-                  )
-                : null,
-            onTap: () => _showDiagnosisSheet(
-              context,
-              result: entry.result,
-              plantNickname: plant.nickname,
-              createdAt: entry.createdAt,
-            ),
-          ),
-      ],
-    );
-  }
-
-  Future<void> _confirmDelete(
-    BuildContext context,
-    WidgetRef ref,
-    PlantDiagnosisEntry entry,
-  ) async {
-    final l10n = AppLocalizations.of(context);
-    final locale = Localizations.localeOf(context).toString();
-    final dateText = entry.createdAt != null
-        ? DateFormat('d. MMMM y', locale).format(entry.createdAt!)
-        : '';
-    final confirmed = await showDialog<bool>(
-      context: context,
-      builder: (dialogContext) => AlertDialog(
-        title: Text(l10n.deleteDiagnosisQuestion(dateText)),
-        actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(dialogContext, false),
-            child: Text(l10n.cancel),
-          ),
-          FilledButton(
-            onPressed: () => Navigator.pop(dialogContext, true),
-            child: Text(l10n.delete),
-          ),
-        ],
-      ),
-    );
-    if (confirmed == true) {
-      await ref
-          .read(plantDiagnosisServiceProvider)
-          .deleteDiagnosis(plant.id, entry.id);
-    }
-  }
-}
 
 /// Krankheits-Check (V3): Foto aufnehmen → Claude beurteilt den Zustand
 /// und gibt Behandlungstipps. Auch für Sitter nutzbar (nur lesend).
@@ -437,7 +220,7 @@ class _DiagnosisSectionState extends ConsumerState<_DiagnosisSection> {
         debugPrint('Untersuchung speichern fehlgeschlagen: $error');
       }
       if (!mounted) return;
-      await _showDiagnosisSheet(
+      await showDiagnosisSheet(
         context,
         result: result,
         plantNickname: widget.plant.nickname,
@@ -465,6 +248,13 @@ class _DiagnosisSectionState extends ConsumerState<_DiagnosisSection> {
   @override
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context);
+    // Für den Historie-Button: deaktiviert, solange keine Untersuchungen
+    // gespeichert sind (oder die Liste noch lädt).
+    final hasHistory = (ref
+                .watch(plantDiagnosesProvider(widget.plant.id))
+                .value ??
+            const [])
+        .isNotEmpty;
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
@@ -487,6 +277,15 @@ class _DiagnosisSectionState extends ConsumerState<_DiagnosisSection> {
               ),
           textAlign: TextAlign.center,
         ),
+        const SizedBox(height: 12),
+        OutlinedButton.icon(
+          onPressed: hasHistory
+              ? () => context
+                  .push(AppRoutes.plantDiagnoses(widget.plant.id))
+              : null,
+          icon: const Icon(Icons.history),
+          label: Text(l10n.diagnosisHistoryButton),
+        ),
       ],
     );
   }
diff --git a/lib/features/plants/presentation/plant_diagnoses_screen.dart b/lib/features/plants/presentation/plant_diagnoses_screen.dart
new file mode 100644
index 0000000..8cb3b42
--- /dev/null
+++ b/lib/features/plants/presentation/plant_diagnoses_screen.dart
@@ -0,0 +1,129 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:intl/intl.dart';
+
+import '../../../l10n/generated/app_localizations.dart';
+import '../../household/data/household_providers.dart';
+import '../../household/domain/household.dart';
+import '../data/plant_diagnosis_service.dart';
+import '../data/plants_provider.dart';
+import 'diagnosis_sheet.dart';
+
+/// Untersuchungs-Seite einer Pflanze: alle gespeicherten Diagnosen
+/// (neueste zuerst); Antippen öffnet das volle Ergebnis, volle Mitglieder
+/// können Einträge löschen.
+class PlantDiagnosesScreen extends ConsumerWidget {
+  const PlantDiagnosesScreen({super.key, required this.plantId});
+
+  final String plantId;
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final l10n = AppLocalizations.of(context);
+    final theme = Theme.of(context);
+    final plant = ref.watch(plantByIdProvider(plantId));
+
+    if (plant == null) {
+      // Pflanze wurde gelöscht, während der Screen offen war.
+      return Scaffold(appBar: AppBar(), body: const SizedBox.shrink());
+    }
+
+    final entries = ref.watch(plantDiagnosesProvider(plantId)).value ?? [];
+    final canEdit = ref.watch(myRoleProvider) == HouseholdRole.member;
+    final locale = Localizations.localeOf(context).toString();
+    final dateFormat = DateFormat('d. MMMM y, HH:mm', locale);
+    final healthyColor = theme.brightness == Brightness.dark
+        ? Colors.green.shade300
+        : Colors.green.shade700;
+
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('${l10n.diagnosisHistoryTitle} · ${plant.nickname}'),
+      ),
+      body: entries.isEmpty
+          // Kommt nur vor, wenn hier der letzte Eintrag gelöscht wurde —
+          // der Button im Detail ist bei leerer Historie deaktiviert.
+          ? Center(
+              child: Padding(
+                padding: const EdgeInsets.all(24),
+                child: Text(
+                  l10n.diagnosisHistoryEmpty,
+                  style: theme.textTheme.bodyLarge,
+                  textAlign: TextAlign.center,
+                ),
+              ),
+            )
+          : ListView.builder(
+              padding: const EdgeInsets.all(16),
+              itemCount: entries.length,
+              itemBuilder: (context, index) {
+                final entry = entries[index];
+                return ListTile(
+                  leading: Icon(
+                    entry.result.healthy
+                        ? Icons.check_circle
+                        : Icons.warning_amber_rounded,
+                    color: entry.result.healthy
+                        ? healthyColor
+                        : theme.colorScheme.error,
+                  ),
+                  title: Text(
+                    entry.result.summary,
+                    maxLines: 2,
+                    overflow: TextOverflow.ellipsis,
+                  ),
+                  subtitle: entry.createdAt != null
+                      ? Text(dateFormat.format(entry.createdAt!))
+                      : null,
+                  trailing: canEdit
+                      ? IconButton(
+                          icon: const Icon(Icons.delete_outline),
+                          tooltip: l10n.delete,
+                          onPressed: () => _confirmDelete(context, ref, entry),
+                        )
+                      : null,
+                  onTap: () => showDiagnosisSheet(
+                    context,
+                    result: entry.result,
+                    plantNickname: plant.nickname,
+                    createdAt: entry.createdAt,
+                  ),
+                );
+              },
+            ),
+    );
+  }
+
+  Future<void> _confirmDelete(
+    BuildContext context,
+    WidgetRef ref,
+    PlantDiagnosisEntry entry,
+  ) async {
+    final l10n = AppLocalizations.of(context);
+    final locale = Localizations.localeOf(context).toString();
+    final dateText = entry.createdAt != null
+        ? DateFormat('d. MMMM y', locale).format(entry.createdAt!)
+        : '';
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: Text(l10n.deleteDiagnosisQuestion(dateText)),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(dialogContext, false),
+            child: Text(l10n.cancel),
+          ),
+          FilledButton(
+            onPressed: () => Navigator.pop(dialogContext, true),
+            child: Text(l10n.delete),
+          ),
+        ],
+      ),
+    );
+    if (confirmed == true) {
+      await ref
+          .read(plantDiagnosisServiceProvider)
+          .deleteDiagnosis(plantId, entry.id);
+    }
+  }
+}
diff --git a/lib/l10n/app_de.arb b/lib/l10n/app_de.arb
index d919182..0a339b1 100644
--- a/lib/l10n/app_de.arb
+++ b/lib/l10n/app_de.arb
@@ -241,6 +241,8 @@
   },
   "diagnosisFailed": "Die Untersuchung hat nicht geklappt. Bitte versuche es erneut.",
   "diagnosisHistoryTitle": "Untersuchungen",
+  "diagnosisHistoryButton": "Frühere Untersuchungen",
+  "diagnosisHistoryEmpty": "Noch keine Untersuchungen gespeichert.",
   "diagnosisDate": "Untersucht am {date}",
   "@diagnosisDate": {
     "placeholders": {
diff --git a/lib/l10n/generated/app_localizations.dart b/lib/l10n/generated/app_localizations.dart
index 9f80b6a..f16d4a8 100644
--- a/lib/l10n/generated/app_localizations.dart
+++ b/lib/l10n/generated/app_localizations.dart
@@ -880,6 +880,18 @@ abstract class AppLocalizations {
   /// **'Untersuchungen'**
   String get diagnosisHistoryTitle;
 
+  /// No description provided for @diagnosisHistoryButton.
+  ///
+  /// In de, this message translates to:
+  /// **'Frühere Untersuchungen'**
+  String get diagnosisHistoryButton;
+
+  /// No description provided for @diagnosisHistoryEmpty.
+  ///
+  /// In de, this message translates to:
+  /// **'Noch keine Untersuchungen gespeichert.'**
+  String get diagnosisHistoryEmpty;
+
   /// No description provided for @diagnosisDate.
   ///
   /// In de, this message translates to:
diff --git a/lib/l10n/generated/app_localizations_de.dart b/lib/l10n/generated/app_localizations_de.dart
index c7ef0a0..09a4911 100644
--- a/lib/l10n/generated/app_localizations_de.dart
+++ b/lib/l10n/generated/app_localizations_de.dart
@@ -481,6 +481,12 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get diagnosisHistoryTitle => 'Untersuchungen';
 
+  @override
+  String get diagnosisHistoryButton => 'Frühere Untersuchungen';
+
+  @override
+  String get diagnosisHistoryEmpty => 'Noch keine Untersuchungen gespeichert.';
+
   @override
   String diagnosisDate(String date) {
     return 'Untersucht am $date';
diff --git a/test/widget_test.dart b/test/widget_test.dart
index c7dd011..b9e1a66 100644
--- a/test/widget_test.dart
+++ b/test/widget_test.dart
@@ -406,10 +406,14 @@ void main() {
     await tester.tap(find.text('Monstera'));
     await tester.pumpAndSettle();
 
-    // Historie ist sichtbar.
-    await tester.scrollUntilVisible(
-        find.text('Die Blätter zeigen braune Flecken.'), 200);
-    expect(find.text('Untersuchungen'), findsOneWidget);
+    // Historie-Button ist aktiv (Untersuchungen vorhanden) → Seite öffnen.
+    await tester.scrollUntilVisible(find.text('Frühere Untersuchungen'), 200);
+    await tester.tap(find.text('Frühere Untersuchungen'));
+    await tester.pumpAndSettle();
+
+    // Untersuchungs-Seite listet den Eintrag.
+    expect(find.textContaining('Untersuchungen'), findsWidgets);
+    expect(find.text('Die Blätter zeigen braune Flecken.'), findsOneWidget);
     expect(find.textContaining('20. Juli 2026'), findsOneWidget);
 
     // Eintrag öffnen → volles Ergebnis-Sheet mit Behandlungstipps.
@@ -419,6 +423,27 @@ void main() {
     expect(find.text('Stelle die Pflanze etwas schattiger.'), findsOneWidget);
   });
 
+  testWidgets(
+      'Ohne gespeicherte Untersuchungen ist der Historie-Button deaktiviert',
+      (tester) async {
+    await tester.pumpWidget(await buildTestApp());
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byIcon(Icons.menu));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text('Meine Pflanzen'));
+    await tester.pumpAndSettle();
+    await tester.tap(find.text('Monstera'));
+    await tester.pumpAndSettle();
+
+    await tester.scrollUntilVisible(find.text('Frühere Untersuchungen'), 200);
+    final button = tester.widget<OutlinedButton>(find.ancestor(
+      of: find.text('Frühere Untersuchungen'),
+      matching: find.byType(OutlinedButton),
+    ));
+    expect(button.onPressed, isNull);
+  });
+
   testWidgets('Mitglied kann den Haushalt umbenennen', (tester) async {
     await tester.pumpWidget(await buildTestApp());
     await tester.pumpAndSettle();