feat(VocabLessonView, localization): add vocabulary review feature and update translations

- Implemented a new vocabulary review section in VocabLessonView to display the last incorrect answer, including the asked vocabulary, user answer, and correct answer.
- Added localization strings for the new review feature in Cebuano, German, English, Spanish, and French, enhancing user experience across multiple languages.
- Updated the UI to visually differentiate the review section, improving clarity and usability during vocabulary training sessions.

frontend/src/i18n/locales/de/socialnetwork.json

@@ -576,6 +576,9 @@
                 "checkAnswer": "Antwort prüfen",
                 "correct": "Richtig!",
                 "wrong": "Falsch",
+                "trainerWrongReviewTitle": "Noch einmal ansehen",
+                "trainerAskedVocab": "Abgefragt",
+                "trainerYourAnswer": "Deine Antwort",
                 "explanation": "Erklärung",
                 "learn": "Lernen",
                 "exercises": "Kapitel-Prüfung",