refactor(api): standardize responses and restore media config contracts

app/schemas/notification.py

@@ -0,0 +1,29 @@
+"""通知渠道 API 输出模型。"""
+
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+class WechatClawBotKnownTarget(BaseModel):
+    """微信 ClawBot 已知消息目标。"""
+
+    userid: str
+    username: str
+    last_active: Optional[int | float] = None
+
+
+class WechatClawBotData(BaseModel):
+    """微信 ClawBot 登录状态或操作结果。"""
+
+    success: bool
+    message: Optional[str] = None
+    connected: Optional[bool] = None
+    account_id: Optional[str] = None
+    qrcode: Optional[str] = None
+    qrcode_url: Optional[str] = None
+    qrcode_status: Optional[str] = None
+    qrcode_updated_at: Optional[int | float] = None
+    known_targets: list[WechatClawBotKnownTarget] = Field(default_factory=list)
+    default_target: Optional[str] = None
+    base_url: Optional[str] = None