feat: add topic summaries and growth profiles

ai_knowledge_base_v2/apps/backend/app/api/chat.py

@@ -30,6 +30,7 @@ from app.services.chat_queue_runtime import (
 )
 from app.services.chat_queue_service import load_chat_queue_config
 from app.services.chat_stream_service import ChatStreamService
+from app.services.growth_profile_service import GrowthProfileService
 from app.services.reasoning_policy_service import ReasoningPolicyService
 
 router = APIRouter()
@@ -85,6 +86,16 @@ def delete_session(
     return api_success()
 
 
+@router.post("/session/{session_id}/topic/finish")
+def finish_topic(
+    session_id: int,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> dict:
+    session = ChatService._get_user_session(db, current_user, session_id)
+    return api_success(GrowthProfileService.finish_active_topic(db, user=current_user, session=session))
+
+
 @router.post("/completions")
 def completions(
     payload: ChatCompletionRequest,