feat: Erweiterung der akzeptierten Antworten im Vokabeltrainer durch Deduplizierung und Variantenaufspaltung

frontend/src/views/social/VocabLessonView.vue

@@ -3972,16 +3972,23 @@ export default {
           const allTrainerVocabs = pool;
           const direction = this.vocabTrainerDirection;
           const prompt = direction === 'L2R' ? vocab.learning : vocab.reference;
-          const acceptableAnswers = this.getEquivalentVocabAnswers(prompt, direction, allTrainerVocabs);
+          const rawAcceptable = this.getEquivalentVocabAnswers(prompt, direction, allTrainerVocabs);
+          // Expand variants (split slashes / parentheses) and dedupe by normalized form
+          const expanded = rawAcceptable.flatMap(a => this.expandAnswerVariants(a));
+          const seen = new Set();
+          const finalAnswers = [];
+          for (const a of expanded) {
+            const n = this.normalizeVocab(a);
+            if (!n || seen.has(n)) continue;
+            seen.add(n);
+            finalAnswers.push(a);
+          }
+          const fallback = direction === 'L2R' ? vocab.reference : vocab.learning;
           this.currentVocabQuestion = {
             vocab,
             prompt,
-            answers: acceptableAnswers.length > 0
+            answers: finalAnswers.length > 0 ? finalAnswers : [fallback],
-              ? acceptableAnswers
+            answer: finalAnswers.length > 0 ? finalAnswers.join(' / ') : fallback,
-              : [direction === 'L2R' ? vocab.reference : vocab.learning],
-            answer: acceptableAnswers.length > 0
-              ? acceptableAnswers.join(' / ')
-              : (direction === 'L2R' ? vocab.reference : vocab.learning),
             key: this.getVocabKey(vocab),
             source: 'hard'
           };
@@ -4072,9 +4079,10 @@ export default {
             : [vocab.learning]);
       const equivalentAnswers = this.getEquivalentVocabAnswers(prompt, direction, allTrainerVocabs);
       const mergedRaw = [...baseAnswers, ...equivalentAnswers].filter(Boolean);
+      const expandedMerged = mergedRaw.flatMap(a => this.expandAnswerVariants(a));
       const seenNorm = new Set();
       const acceptableAnswers = [];
-      for (const a of mergedRaw) {
+      for (const a of expandedMerged) {
         const n = this.normalizeVocab(a);
         if (!n || seenNorm.has(n)) continue;
         seenNorm.add(n);