feat(feedback): implement ChipDip-style floating dev feedback & bug report widget with markdown sync

app/main.py

@@ -27,6 +27,7 @@ from app.routers.grammar import GrammarAnswerRequest, GrammarCompleteRequest, Gr
 from app.routers.tasks import MineBooksRequest
 from app.routers.listening import ListeningCheckRequest
 from app.routers.lessons import SavePresetRequest, LessonDebriefRequest
+from app.routers.feedback import FeedbackCreateRequest, FeedbackStatusUpdateRequest
 
 
 @asynccontextmanager