chore: 批量整理代码格式与优化细节

- 修复多处代码缩进、换行不规范问题
- 调整部分配置注释与字符串格式对齐
- 优化导入语句与多行表达式的排版
- 统一枚举、模型字段的注释风格
- 调整部分校验逻辑与提示文案
- 重构部分长函数参数与查询语句格式

backend/app/plugin/module_ai/chat/schema.py

@@ -1,31 +1,52 @@
+import re
 from dataclasses import dataclass
 from typing import Any
 
 from fastapi import Query
-from pydantic import BaseModel, ConfigDict, Field
+from pydantic import BaseModel, ConfigDict, Field, field_validator
 
 from app.core.validator import DateTimeStr
 
 
 class ChatQuerySchema(BaseModel):
     """WebSocket聊天查询模型"""
-    message: str = Field(..., description="消息内容")
+
+    message: str = Field(..., min_length=1, description="消息内容")
     session_id: str | None = Field(None, description="会话ID")
     files: list[dict[str, Any]] | None = Field(None, description="文件信息")
 
 
 class ChatSessionCreateSchema(BaseModel):
     """创建会话模型"""
-    title: str = Field(..., description="会话标题")
+
+    title: str = Field(..., min_length=1, max_length=200, description="会话标题")
+
+    @field_validator("title")
+    @classmethod
+    def validate_title(cls, v: str) -> str:
+        v = v.strip()
+        if len(v) < 1 or len(v) > 200:
+            raise ValueError("会话标题长度必须在1-200个字符之间")
+        return v
 
 
 class ChatSessionUpdateSchema(BaseModel):
     """更新会话模型"""
-    title: str = Field(..., description="会话标题")
+
+    title: str = Field(..., min_length=1, max_length=200, description="会话标题")
+
+    @field_validator("title")
+    @classmethod
+    def validate_title(cls, v: str) -> str:
+        v = v.strip()
+        if len(v) < 1 or len(v) > 200:
+            raise ValueError("会话标题长度必须在1-200个字符之间")
+        return v
 
 
 class ChatSessionMessageSchema(BaseModel):
     """会话消息模型"""
+
     id: str = Field(..., description="消息ID")
     role: str = Field(..., description="消息角色")
     content: str = Field(..., description="消息内容")
@@ -37,6 +58,7 @@ class ChatSessionMessageSchema(BaseModel):
 @dataclass
 class ChatSessionQueryParam:
     """会话查询参数"""
+
     def __init__(
         self,
         title: str | None = Query(None, description="会话标题"),
@@ -58,12 +80,22 @@ class ChatSessionQueryParam:
 
 class AiChatRequestSchema(BaseModel):
     """AI 对话请求模型（非流式）"""
-    message: str = Field(..., description="用户消息内容")
+
+    message: str = Field(..., min_length=1, description="用户消息内容")
     session_id: str | None = Field(None, description="会话ID，不传则创建新会话")
 
+    @field_validator("message")
+    @classmethod
+    def validate_message(cls, v: str) -> str:
+        v = v.strip()
+        if len(v) < 1:
+            raise ValueError("用户消息内容不能为空")
+        return v
+
 
 class AiChatResponseSchema(BaseModel):
     """AI 对话响应模型（非流式）"""
+
     response: str = Field(..., description="AI 回复内容")
     session_id: str = Field(..., description="会话ID")
     function_calls: list[dict[str, Any]] | None = Field(None, description="函数调用信息")