chore: finalize backend feature scope

app/agents/hint_agent.py

@@ -9,11 +9,11 @@ from app.models.training import SessionOrder, TrainingSession
 
 
 class HintAgent:
-    """新手提示 Agent：基于病例、对话和检查结果调用快速模型生成结构化提示。"""
+    """练习提示 Agent：基于病例、对话和检查结果调用快速模型生成结构化提示。"""
 
     def __init__(self, llm: DeepSeekClient | None = None) -> None:
         self.llm = llm or DeepSeekClient()
-        self.template_path = Path(__file__).resolve().parents[1] / "prompts" / "hint" / "novice_case_hint.md"
+        self.template_path = Path(__file__).resolve().parents[1] / "prompts" / "hint" / "practice_case_hint.md"
 
     async def generate(
         self,
@@ -85,7 +85,7 @@ class HintAgent:
         }
 
     def _load_template(self) -> str:
-        """提示词读取：加载新手模式病例提示模板。"""
+        """提示词读取：加载练习模式病例提示模板。"""
         if self.template_path.exists():
             return self.template_path.read_text(encoding="utf-8")
         return "你是医疗问诊训练提示 Agent，只输出合法 JSON。"