feat(admin): add potential fathers retrieval for character management

- Implemented a new method in AdminService to fetch potential fathers for a given character based on existing relationships.
- Updated AdminController to expose this functionality via a new API endpoint.
- Enhanced adminRouter to include the route for retrieving potential fathers.
- Modified frontend components to allow selection of potential fathers during pregnancy and birth management.
- Updated internationalization files to include new translation keys related to father selection.

frontend/src/views/social/VocabLessonView.vue

@@ -43,6 +43,14 @@
               <span class="lesson-meta-label">{{ $t('socialnetwork.vocab.courses.lessonTypeLabel') }}</span>
               <strong>{{ getLessonTypeLabel(lesson.lessonType) }}</strong>
             </div>
+            <div class="lesson-meta-item" v-if="lessonPedagogy.phaseLabel">
+              <span class="lesson-meta-label">Phase</span>
+              <strong>{{ getPhaseLabel(lessonPedagogy.phaseLabel) }}</strong>
+            </div>
+            <div class="lesson-meta-item" v-if="lessonPedagogy.didacticMode">
+              <span class="lesson-meta-label">Fokus</span>
+              <strong>{{ getDidacticModeLabel(lessonPedagogy.didacticMode) }}</strong>
+            </div>
             <div class="lesson-meta-item">
               <span class="lesson-meta-label">{{ $t('socialnetwork.vocab.courses.recommendedDuration') }}</span>
               <strong>{{ formatTargetMinutes(lesson.targetMinutes) }}</strong>
@@ -51,9 +59,22 @@
               <span class="lesson-meta-label">{{ $t('socialnetwork.vocab.courses.exerciseLoad') }}</span>
               <strong>{{ effectiveExercises?.length || 0 }} {{ $t('socialnetwork.vocab.courses.exercisesShort') }}</strong>
             </div>
+            <div class="lesson-meta-item" v-if="lessonPedagogy.newUnitTarget">
+              <span class="lesson-meta-label">Neue Einheiten</span>
+              <strong>{{ lessonPedagogy.newUnitTarget }}</strong>
+            </div>
+            <div class="lesson-meta-item" v-if="lessonPedagogy.reviewWeight != null">
+              <span class="lesson-meta-label">Wiederholung</span>
+              <strong>{{ lessonPedagogy.reviewWeight }}%</strong>
+            </div>
           </div>
         </div>
 
+        <div v-if="lessonPedagogy.isIntensiveReview" class="lesson-intensity-banner">
+          <strong>Intensive Wiederholungsphase</strong>
+          <p>Diese Lektion priorisiert Wiederholung und Vertiefung. Neuer Stoff wird bewusst reduziert, damit vorhandene Muster stabil werden.</p>
+        </div>
+
         <div class="learn-grid">
           <div v-if="lesson && lesson.description" class="lesson-description-box">
             <h4>{{ $t('socialnetwork.vocab.courses.lessonDescription') }}</h4>
@@ -872,6 +893,17 @@ export default {
         practicalTasks: []
       };
     },
+    lessonPedagogy() {
+      return this.lesson?.pedagogy || {
+        didacticMode: null,
+        phaseLabel: null,
+        blockNumber: null,
+        difficultyWeight: null,
+        newUnitTarget: null,
+        reviewWeight: null,
+        isIntensiveReview: false
+      };
+    },
     assistantAvailable() {
       if (!this.assistantSettings) {
         return false;
@@ -1280,6 +1312,36 @@ export default {
       };
       return labels[lessonType] || lessonType || this.$t('socialnetwork.vocab.courses.lessonTypeVocab');
     },
+    getPhaseLabel(phaseLabel) {
+      switch (phaseLabel) {
+        case 'quickstart':
+          return 'Schnellstart';
+        case 'daily_life':
+          return 'Alltag';
+        case 'stabilization':
+          return 'Stabilisierung';
+        default:
+          return 'Lernphase';
+      }
+    },
+    getDidacticModeLabel(didacticMode) {
+      switch (didacticMode) {
+        case 'core_input':
+          return 'Neuer Stoff';
+        case 'guided_dialogue':
+          return 'Geführter Dialog';
+        case 'pattern_drill':
+          return 'Mustertraining';
+        case 'real_life_scenario':
+          return 'Alltagsszenario';
+        case 'intensive_review':
+          return 'Wiederholungsphase';
+        case 'checkpoint':
+          return 'Checkpoint';
+        default:
+          return 'Lernfokus';
+      }
+    },
     formatTargetMinutes(targetMinutes) {
       const minutes = Number(targetMinutes);
       if (!minutes) {
@@ -2187,6 +2249,24 @@ export default {
   color: #7a6848;
 }
 
+.lesson-intensity-banner {
+  margin-bottom: 18px;
+  padding: 14px 16px;
+  border-radius: 12px;
+  border: 1px solid rgba(207, 78, 78, 0.24);
+  background: rgba(255, 242, 242, 0.95);
+  color: #8e3d3d;
+}
+
+.lesson-intensity-banner strong,
+.lesson-intensity-banner p {
+  margin: 0;
+}
+
+.lesson-intensity-banner p {
+  margin-top: 6px;
+}
+
 .learn-grid {
   display: grid;
   grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));