update

app.js

@@ -166,7 +166,7 @@ app.get('/api', (req, res) => {
       lessons: '/api/lessons',
       games: '/api/games',
       gameTypes: '/api/game-types',
-      vocab: '/api/vocab',
+      vocabs: '/api/vocabs',
       contexts: '/api/contexts',
       contextGuides: '/api/context-guides',
       upload: '/api/upload',
@@ -223,7 +223,7 @@ app.use('/api/chapters', chapterLessonRoutes); // Nested route: /api/chapters/:i
 app.use('/api/games', gameRoutes);
 app.use('/api/game-types', gameTypeRoutes);
 app.use('/api/lessons', lessonRoutes);
-app.use('/api/vocab', vocabRoutes);
+app.use('/api/vocabs', vocabRoutes);
 app.use('/api/grammar', grammarRoutes);
 app.use('/api/stories', storyRoutes);
 app.use('/api/learning-content', learningContentRoutes);