feat(huya): 整合 App 协议登录获取 Cookie 全链路并与 Web 登录解耦

- core/huya: 新增 app_login, wup_encoder, nonce_forge, cert_forge, envelope_forge, device_profile, udb_aes
- core/huya/__init__.py: 导出 login_huya_app_password 与 HuyaAppPasswordLogin
- web/backend: 新增 /accounts/app-password-login 与 /accounts/app-password-login/selected 路由及 Schema，与原 Web 密码登录独立分开
- web/frontend: 增加 App 登录 API 与前端界面“App 登录选中”操作，弹窗结果明确区分
- tests: 新增 test_huya_app_login.py 单元测试覆盖全链路

core/huya/__init__.py

@@ -12,11 +12,15 @@ __all__ = [
     "HuyaLoginError",
     "HuyaLoginResult",
     "HuyaPasswordLogin",
+    "HuyaAppLoginError",
+    "HuyaAppQrAuthRequiredError",
+    "HuyaAppPasswordLogin",
     "HuyaSmsCodeResult",
     "HuyaSmsLogin",
     "HuyaVerificationError",
     "HuyaVerificationSolver",
     "login_huya_password",
+    "login_huya_app_password",
     "login_huya_sms",
     "send_huya_sms_code",
     "solve_huya_verification",
@@ -57,6 +61,27 @@ def __getattr__(name: str):
         }
         globals().update(values)
         return values[name]
+    if name in {
+        "HuyaAppLoginError",
+        "HuyaAppQrAuthRequiredError",
+        "HuyaAppPasswordLogin",
+        "login_huya_app_password",
+    }:
+        from .app_login import (
+            HuyaAppLoginError,
+            HuyaAppQrAuthRequiredError,
+            HuyaAppPasswordLogin,
+            login_huya_app_password,
+        )
+
+        values = {
+            "HuyaAppLoginError": HuyaAppLoginError,
+            "HuyaAppQrAuthRequiredError": HuyaAppQrAuthRequiredError,
+            "HuyaAppPasswordLogin": HuyaAppPasswordLogin,
+            "login_huya_app_password": login_huya_app_password,
+        }
+        globals().update(values)
+        return values[name]
     if name in {
         "HuyaSmsCodeResult",
         "HuyaSmsLogin",