chore: finalize backend feature scope

app/api/sessions.py

@@ -8,7 +8,6 @@ from app.db.session import get_db
 from app.schemas.evaluation import CreateEvaluationRequest, EvaluationResponse
 from app.schemas.session import (
     ChatRequest,
-    ChatResponse,
     CreateOrderRequest,
     CreateOrderResponse,
     CreateSessionRequest,
@@ -41,19 +40,6 @@ def create_session(
     return ok(result)
 
 
-@router.post("/{session_id}/chat", response_model=ApiResponse[ChatResponse])
-async def chat(
-    session_id: int,
-    payload: ChatRequest,
-    ctx: UserContext = Depends(get_user_context),
-    db: Session = Depends(get_db),
-):
-    """非流式问诊：发送医生问题并返回 AI 病人回复。"""
-    result = await SessionService(db).chat(ctx, session_id, payload.message)
-    db.commit()
-    return ok(result)
-
-
 @router.post("/{session_id}/chat/stream", response_class=StreamingResponse)
 async def chat_stream(
     session_id: int,
@@ -117,7 +103,7 @@ async def generate_hints(
     ctx: UserContext = Depends(get_user_context),
     db: Session = Depends(get_db),
 ):
-    """新手模式提示：根据当前问诊上下文生成缺失维度和下一步问题。"""
+    """练习提示：根据当前问诊上下文生成缺失维度和下一步问题。"""
     result = await SessionService(db).generate_hints(ctx, session_id, payload)
     db.commit()
     return ok(result)