feat(vocab): add lesson and completed lesson vocab pool endpoints

- Implemented new endpoints in VocabController for retrieving vocab pools based on lessons and completed lessons.
- Updated vocabRouter to include routes for accessing lesson vocab pools and completed lesson vocab pools.
- Enhanced VocabService with methods to extract vocab from exercises and lesson didactics, improving vocabulary retrieval for users.
- Modified VocabPracticeDialog and VocabCourseView components to support new vocab pool functionalities, enhancing user experience in vocabulary practice.

frontend/src/dialogues/socialnetwork/VocabPracticeDialog.vue

@@ -110,7 +110,7 @@ export default {
   components: { DialogWidget },
   data() {
     return {
-      openParams: null, // { languageId, chapterId }
+      openParams: null, // { languageId, chapterId, lessonId, courseId }
       onClose: null,
       loading: false,
       allVocabs: false,
@@ -168,12 +168,12 @@ export default {
     },
   },
   methods: {
-    open({ languageId, chapterId, onClose = null }) {
+    open({ languageId, chapterId, lessonId, courseId, onClose = null }) {
       if (this.autoAdvanceTimer) {
         clearTimeout(this.autoAdvanceTimer);
         this.autoAdvanceTimer = null;
       }
-      this.openParams = { languageId, chapterId };
+      this.openParams = { languageId, chapterId, lessonId, courseId };
       this.onClose = typeof onClose === 'function' ? onClose : null;
       this.allVocabs = false;
       this.simpleMode = false;
@@ -231,7 +231,7 @@ export default {
     },
     resetQuestion() {
       this.current = null;
-      this.direction = Math.random() < 0.5 ? 'L2R' : 'R2L';
+      this.direction = this.openParams?.lessonId ? 'L2R' : (Math.random() < 0.5 ? 'L2R' : 'R2L');
       this.acceptableAnswers = [];
       this.choiceOptions = [];
       this.typedAnswer = '';
@@ -272,7 +272,19 @@ export default {
       this.loading = true;
       try {
         let res;
-        if (this.allVocabs) {
+        if (this.openParams.lessonId) {
+          if (this.allVocabs && this.openParams.courseId) {
+            res = await apiClient.get(`/api/vocab/courses/${this.openParams.courseId}/completed-lesson-vocabs`, {
+              params: {
+                untilLessonId: this.openParams.lessonId
+              }
+            });
+            this.pool = res.data?.vocabs || [];
+          } else {
+            res = await apiClient.get(`/api/vocab/lessons/${this.openParams.lessonId}/vocab-pool`);
+            this.pool = res.data?.vocabs || [];
+          }
+        } else if (this.allVocabs) {
           res = await apiClient.get(`/api/vocab/languages/${this.openParams.languageId}/vocabs`);
           this.pool = res.data?.vocabs || [];
         } else {
@@ -530,5 +542,3 @@ export default {
   font-weight: bold;
 }
 </style>
-
-