feat(notification): redesign system to support multiple providers

- Add NotificationProvider base class with send() and test() methods
- Add NotificationManager for handling multiple providers simultaneously
- Add new providers: Discord, Gotify, Pushover, generic Webhook
- Migrate existing providers (Telegram, Bark, Server Chan, WeChat Work) to new architecture
- Add API endpoints for testing providers (/notification/test, /notification/test-config)
- Auto-migrate legacy single-provider configs to new multi-provider format
- Update WebUI with card-based multi-provider settings UI
- Add test button for each provider in settings
- Generic webhook supports template variables: {{title}}, {{season}}, {{episode}}, {{poster_url}}

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/module/api/setup.py

@@ -8,7 +8,8 @@ from pydantic import BaseModel, Field
 from module.conf import VERSION, settings
 from module.models import Config, ResponseModel
 from module.network import RequestContent
-from module.notification.notification import getClient
+from module.notification import PROVIDER_REGISTRY
+from module.models.config import NotificationProvider as ProviderConfig
 from module.security.jwt import get_password_hash
 
 logger = logging.getLogger(__name__)
@@ -202,8 +203,8 @@ async def test_notification(req: TestNotificationRequest):
     """Send a test notification."""
     _require_setup_needed()
 
-    NotifierClass = getClient(req.type)
-    if NotifierClass is None:
+    provider_cls = PROVIDER_REGISTRY.get(req.type.lower())
+    if provider_cls is None:
         return TestResultResponse(
             success=False,
             message_en=f"Unknown notification type: {req.type}",
@@ -211,30 +212,27 @@ async def test_notification(req: TestNotificationRequest):
         )
 
     try:
-        notifier = NotifierClass(token=req.token, chat_id=req.chat_id)
-        async with notifier:
-            # Send a simple test message
-            data = {"chat_id": req.chat_id, "text": "AutoBangumi 通知测试成功！"}
-            if req.type.lower() == "telegram":
-                resp = await notifier.post_data(notifier.message_url, data)
-                if resp.status_code == 200:
-                    return TestResultResponse(
-                        success=True,
-                        message_en="Test notification sent successfully.",
-                        message_zh="测试通知发送成功。",
-                    )
-                else:
-                    return TestResultResponse(
-                        success=False,
-                        message_en="Failed to send test notification.",
-                        message_zh="测试通知发送失败。",
-                    )
-            else:
-                # For other providers, just verify the notifier can be created
+        # Create provider config
+        config = ProviderConfig(
+            type=req.type,
+            enabled=True,
+            token=req.token,
+            chat_id=req.chat_id,
+        )
+        provider = provider_cls(config)
+        async with provider:
+            success, message = await provider.test()
+            if success:
                 return TestResultResponse(
                     success=True,
-                    message_en="Notification configuration is valid.",
-                    message_zh="通知配置有效。",
+                    message_en="Test notification sent successfully.",
+                    message_zh="测试通知发送成功。",
+                )
+            else:
+                return TestResultResponse(
+                    success=False,
+                    message_en=f"Failed to send test notification: {message}",
+                    message_zh=f"测试通知发送失败：{message}",
                 )
     except Exception as e:
         logger.error(f"[Setup] Notification test failed: {e}")
@@ -275,9 +273,14 @@ async def complete_setup(req: SetupCompleteRequest):
         if req.notification_enable:
             config_dict["notification"] = {
                 "enable": True,
-                "type": req.notification_type,
-                "token": req.notification_token,
-                "chat_id": req.notification_chat_id,
+                "providers": [
+                    {
+                        "type": req.notification_type,
+                        "enabled": True,
+                        "token": req.notification_token,
+                        "chat_id": req.notification_chat_id,
+                    }
+                ],
             }
 
         settings.save(config_dict)