feat(vocab): add language and course dictionary endpoints and UI components

- Implemented `getLanguageDictionary` and `getCourseDictionary` methods in the VocabService to retrieve vocabulary entries filtered by search terms.
- Updated VocabController and vocabRouter to include new routes for accessing language and course dictionaries.
- Enhanced frontend components to navigate to the new dictionary views, including buttons in VocabCourseView and VocabLanguageView.
- Added localization entries for the dictionary feature in multiple languages, ensuring a consistent user experience across the platform.

frontend/src/components/AppSectionBar.vue

@@ -41,8 +41,10 @@ const TITLE_MAP = {
   VocabNewLanguage: 'sectionBar.titles.newLanguage',
   VocabSubscribe: 'sectionBar.titles.subscribeLanguage',
   VocabLanguage: 'sectionBar.titles.language',
+  VocabLanguageDictionary: 'sectionBar.titles.vocabDictionary',
   VocabChapter: 'sectionBar.titles.chapter',
   VocabCourses: 'sectionBar.titles.courses',
+  VocabCourseDictionary: 'sectionBar.titles.vocabDictionary',
   VocabCourse: 'sectionBar.titles.course',
   VocabLesson: 'sectionBar.titles.lesson',
   FalukantCreate: 'sectionBar.titles.createCharacter',
@@ -102,6 +104,14 @@ export default {
     backTarget() {
       const params = this.$route?.params || {};
 
+      if (this.routePath.endsWith('/dictionary') && params.courseId) {
+        return `/socialnetwork/vocab/courses/${params.courseId}`;
+      }
+
+      if (this.routePath.endsWith('/dictionary') && params.languageId) {
+        return `/socialnetwork/vocab/${params.languageId}`;
+      }
+
       if (this.routePath.startsWith('/socialnetwork/vocab/courses/') && params.lessonId && params.courseId) {
         return `/socialnetwork/vocab/courses/${params.courseId}`;
       }