feat(vocabLesson): add detailed review section for failed chapter exams

- Introduced a new review section that displays questions, user answers, and correct answers for failed chapter exams.
- Added localization entries for the review section in multiple languages, enhancing user experience and understanding of mistakes.
- Implemented logic to format and present failed exam details, improving feedback for learners.

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

@@ -544,6 +544,10 @@
                 "exerciseExamFailedTitle": "Minimum score not reached",
                 "exerciseExamFailedBody": "You scored {score}% correct (required: {target}%). Keep practicing in the learning section. After {count} more trainer questions the chapter test unlocks again—you will then retake all questions from the start.",
                 "exerciseExamFailedOk": "OK",
+                "exerciseExamFailedReviewTitle": "These answers were wrong",
+                "exerciseExamFailedQuestionLabel": "Question",
+                "exerciseExamFailedYourAnswerLabel": "Your answer",
+                "exerciseExamFailedNoAnswer": "No answer",
                 "exerciseStatusOpen": "Open",
                 "exerciseStatusCorrect": "Done",
                 "exerciseStatusRetry": "Try again",