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

app/schemas/storage.py

@@ -0,0 +1,26 @@
+"""存储授权 API 输出模型。"""
+
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+class StorageQrCodeData(BaseModel):
+    """云存储扫码授权二维码。"""
+
+    codeContent: Optional[str] = Field(default=None, description="二维码原始内容")
+    codeUrl: Optional[str] = Field(default=None, description="二维码图片地址")
+
+
+class StorageAuthUrlData(BaseModel):
+    """云存储 OAuth 授权入口。"""
+
+    authUrl: str = Field(description="授权地址")
+    state: str = Field(description="授权状态校验值")
+
+
+class StorageLoginStatusData(BaseModel):
+    """云存储扫码或 OAuth 登录状态。"""
+
+    status: int | str = Field(description="授权状态")
+    tip: str = Field(description="状态提示")