feat(web): 虎牙设备绑定页多选批量解绑 — rowSelection 跨页保留 + 全选全部 + 批量接口

- routers/huya.py: POST /api/huya/device-bindings/batch-delete (去重/跳过无记录/删画像+指纹目录)
- schemas.py: HuyaDeviceBindingsBatchDeleteRequest
- DeviceBindingsPage: 多选(rowSelection preserve) / 全选全部 / 解绑选中(N) + loading, 刷新后清理失效选中
- api/huya.ts + types.ts: deleteDeviceBindings 与响应类型

验证: 批量解绑逻辑单测 OK; 77 后端单测 OK; tsc + vite build OK

web/backend/schemas.py

@@ -397,6 +397,11 @@ class HuyaPasswordLoginSelectedRequest(BaseModel):
     force_new_device: bool = False
 
 
+class HuyaDeviceBindingsBatchDeleteRequest(BaseModel):
+    """批量解绑设备：删除账号画像与 hydevice 指纹状态。"""
+    accounts: list[str] = Field(..., min_length=1)
+
+
 class HuyaAccountOut(BaseModel):
     id: int
     uid: str = ""