feat: 宇之然平台 v2.0 - 完整重构版

核心功能:
- 新增 JWT 认证系统，支持管理员登录/登出
- 前后端合并为单一 FastAPI 应用 (端口 8001)
- 系统概览页：6 个统计卡片，点击跳转筛选
- 选题管理页：批量操作 (刷新/创作/优化)，时间列展示
- 系统日志页：整合日志查看功能
- 用户管理页：管理员可创建/删除用户
- 移动端适配：响应式布局，底部导航栏
- 标题居中显示

技术改进:
- 添加 generated_at 字段支持创作时间记录
- 状态更新时自动同步 updated_at
- 所有 API 路由添加 JWT 认证保护
- 前端 authFetch 封装自动附加 Token
- 升级 FastAPI 0.136, Pydantic 2.13 等依赖

修复:
- 修复 API 500 错误 (数据库列缺失)
- 修复 formatRelativeTime 未定义错误
- 修复登录 Token 存储和自动附加逻辑

platform/backend/app/schemas.py

@@ -1,7 +1,51 @@
-from pydantic import BaseModel
+from pydantic import BaseModel, ConfigDict
 from datetime import datetime, date
 from typing import Optional, List, Dict, Any
 
+class AuditLogBase(BaseModel):
+    user_id: Optional[int] = None
+    username: str
+    action: str
+    resource_type: Optional[str] = None
+    resource_id: Optional[str] = None
+    details: Optional[Dict[str, Any]] = None
+    ip_address: Optional[str] = None
+    user_agent: Optional[str] = None
+    created_at: Optional[datetime] = None
+
+class AuditLogResponse(AuditLogBase):
+    id: int
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class UserBase(BaseModel):
+    username: str
+    role: str = "user"
+
+class UserCreate(UserBase):
+    password: str
+
+class UserUpdate(BaseModel):
+    username: Optional[str] = None
+    password: Optional[str] = None
+    role: Optional[str] = None
+
+class UserResponse(UserBase):
+    id: int
+    created_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+class TokenResponse(BaseModel):
+    token: str
+    role: str
+    user: UserResponse
+
 class TopicBase(BaseModel):
     id: str
     title: str
@@ -11,14 +55,14 @@ class TopicBase(BaseModel):
     compliance_score: Optional[int] = None
     ready_at: Optional[date] = None
     published_at: Optional[date] = None
+    generated_at: Optional[datetime] = None
     platform_urls: Optional[Dict[str, str]] = None
 
 class TopicResponse(TopicBase):
     created_at: Optional[datetime] = None
     updated_at: Optional[datetime] = None
 
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 class ArticleBase(BaseModel):
     id: str
@@ -30,8 +74,7 @@ class ArticleBase(BaseModel):
     created_at: Optional[datetime] = None
 
 class ArticleResponse(ArticleBase):
-    class Config:
-        from_attributes = True
+    model_config = ConfigDict(from_attributes=True)
 
 class SystemStatus(BaseModel):
     total_topics: int
@@ -40,14 +83,55 @@ class SystemStatus(BaseModel):
     today_articles: int
     compliance_rate: float
     last_optimization: Optional[datetime] = None
-execution_time: Optional[float] = None  # 任务执行耗时（秒）
+    execution_time: Optional[float] = None
 
 class OptimizationRequest(BaseModel):
-    topic_ids: Optional[List[str]] = None  # None表示全部
+    topic_ids: Optional[List[str]] = None
 
 class PublishRequest(BaseModel):
     topic_id: str
-    platform_urls: Dict[str, str]  # {"zhihu": "...", "wechat": "...", "xiaohongshu": "..."}
+    platform_urls: Dict[str, str]
+
+class PublishActionRequest(BaseModel):
+    action: str
+    platform: Optional[str] = None
+    status: str
+    operator: Optional[str] = None
+    description: Optional[str] = None
+    suggestion: Optional[str] = None
+    url: Optional[str] = None
+    error_msg: Optional[str] = None
+
+class PublishRecordResponse(BaseModel):
+    id: int
+    topic_id: str
+    platform: str
+    action: str
+    status: str
+    operator: Optional[str] = None
+    description: Optional[str] = None
+    suggestion: Optional[str] = None
+    url: Optional[str] = None
+    error_msg: Optional[str] = None
+    created_at: datetime
+
+    model_config = ConfigDict(from_attributes=True)
 
 class BatchPublishRequest(BaseModel):
-    date: str  # YYYY-MM-DD
+    date: str
+
+
+class AuditLogResponse(BaseModel):
+    id: int
+    user_id: Optional[int] = None
+    username: str
+    action: str
+    resource_type: Optional[str] = None
+    resource_id: Optional[str] = None
+    details: Optional[Dict[str, Any]] = None
+    ip_address: Optional[str] = None
+    user_agent: Optional[str] = None
+    created_at: datetime
+
+    model_config = ConfigDict(from_attributes=True)
+