feat(vocab): add dashboard learning summary and related endpoints

- Introduced `getDashboardLearningSummary` method in `VocabService` to provide a compact overview of enrolled courses and current lessons for users.
- Updated `vocabController` to include a new route for the dashboard widget, allowing users to access their learning summary.
- Enhanced `vocabRouter` to route requests for the new dashboard widget endpoint.
- Added localization support for the new dashboard features across multiple languages, improving user engagement and accessibility.
- Updated UI components to integrate the new dashboard widget, ensuring a seamless user experience.

frontend/src/i18n/locales/ceb/falukant.json

@@ -433,7 +433,28 @@
       "bookmarkCandidate": "Timan-i kining kandidatura",
       "voteError": "Sayop sa paghatag sa boto",
       "voteAllError": "Sayop sa paghatag sa mga boto",
-      "applyError": "Dili mapadala ang aplikasyon."
+      "applyError": "Dili mapadala ang aplikasyon.",
+      "benefits": {
+        "daily_salary": "Adlaw-adlaw nga suhol (usa ra kada adlaw): mga {amount}",
+        "tax_exemption": "Wa’y buhis: {regions}",
+        "tax_exemption_all": "Wa’y buhis: tanang lebel sa rehiyon",
+        "generic": "Benepisyo ({code})"
+      },
+      "regionLevels": {
+        "city": "Siyudad",
+        "county": "County",
+        "shire": "Shire",
+        "markgrave": "Margravate",
+        "duchy": "Duchy",
+        "country": "Nasud"
+      },
+      "current": {
+        "benefit": "Benepisyo",
+        "benefit_all": "Tanang rehiyon",
+        "holder": "Tag-iya",
+        "none": "Walay karon nga posisyon.",
+        "termEnds": "Matapos sa"
+      }
     },
     "family": {
       "title": "Pamilya",