Enhance VocabService to combine AND conditions in query filtering

- Updated VocabService to combine AND conditions with direct where properties when both are present, improving query accuracy.
- Added comments for better understanding of the new logic and its implications on course retrieval.

backend/services/vocabService.js

@@ -606,7 +606,19 @@ export default class VocabService {
     }
 
     // Kombiniere alle AND-Bedingungen
+    // Wenn sowohl andConditions als auch direkte where-Eigenschaften existieren,
+    // müssen sie kombiniert werden
     if (andConditions.length > 0) {
+      // Wenn where bereits direkte Eigenschaften hat, füge sie zu andConditions hinzu
+      const directWhereProps = Object.keys(where).filter(key => key !== Op.and && key !== Op.or);
+      if (directWhereProps.length > 0) {
+        const directWhere = {};
+        for (const key of directWhereProps) {
+          directWhere[key] = where[key];
+          delete where[key];
+        }
+        andConditions.push(directWhere);
+      }
       where[Op.and] = andConditions;
     }
 
@@ -621,7 +633,9 @@ export default class VocabService {
       languageId,
       nativeLanguageId,
       search,
-      where: JSON.stringify(where, null, 2)
+      where: JSON.stringify(where, null, 2),
+      includePublic,
+      includeOwn
     });
 
     const coursesData = courses.map(c => c.get({ plain: true }));