feat: add Gitea as webhook-based service provider

First webhook-based provider integration (Immich uses polling).
Gitea pushes events via POST /api/webhooks/gitea/{provider_id} with
HMAC-SHA256 signature validation.

- 9 event types: push, issue opened/closed/commented, PR opened/closed/merged/commented, release published
- Generic filters system on NotificationTracker (collections, senders, exclude_senders)
- Provider capabilities include supported_filters and webhook_based flag
- Gitea API client for connection testing and repository listing
- 18 default Jinja2 notification templates (EN + RU)
- Frontend: conditional provider forms, Gitea event toggles in tracking config
- Auto-migration for filters column and Gitea tracking flags

packages/server/src/notify_bridge_server/services/__init__.py

@@ -1,6 +1,7 @@
 """Shared service utilities."""
 
 from notify_bridge_core.providers.immich import ImmichServiceProvider
+from notify_bridge_core.providers.gitea import GiteaServiceProvider
 
 from ..database.models import ServiceProvider
 
@@ -15,3 +16,14 @@ def make_immich_provider(http_session, provider: ServiceProvider) -> ImmichServi
         config.get("external_domain"),
         provider.name,
     )
+
+
+def make_gitea_provider(http_session, provider: ServiceProvider) -> GiteaServiceProvider:
+    """Create a GiteaServiceProvider from a DB provider model."""
+    config = provider.config or {}
+    return GiteaServiceProvider(
+        http_session,
+        config.get("url", ""),
+        config.get("api_token", ""),
+        provider.name,
+    )

packages/server/src/notify_bridge_server/services/watcher.py

@@ -78,11 +78,22 @@ def _event_allowed_by_config(event: ServiceEvent, tc: TrackingConfig) -> bool:
     """Check if an event type is allowed by the tracking config's flags."""
     event_type = event.event_type.value
     flag_map = {
+        # Immich events
         "assets_added": tc.track_assets_added,
         "assets_removed": tc.track_assets_removed,
         "collection_renamed": tc.track_collection_renamed,
         "collection_deleted": tc.track_collection_deleted,
         "sharing_changed": tc.track_sharing_changed,
+        # Gitea events
+        "push": tc.track_push,
+        "issue_opened": tc.track_issue_opened,
+        "issue_closed": tc.track_issue_closed,
+        "issue_commented": tc.track_issue_commented,
+        "pr_opened": tc.track_pr_opened,
+        "pr_closed": tc.track_pr_closed,
+        "pr_merged": tc.track_pr_merged,
+        "pr_commented": tc.track_pr_commented,
+        "release_published": tc.track_release_published,
     }
     return flag_map.get(event_type, True)
 
@@ -220,6 +231,10 @@ async def check_tracker(tracker_id: int) -> dict[str, Any]:
                 return {"status": "error", "reason": "failed to connect to provider"}
 
             events, new_state = await immich.poll(collection_ids, state_dict)
+    elif provider_type == "gitea":
+        # Gitea is webhook-based — events arrive via /api/webhooks/gitea endpoint.
+        # The scheduler still calls check_tracker but there's nothing to poll.
+        return {"status": "ok", "events_detected": 0, "collections_checked": 0}
     else:
         return {"status": "error", "reason": f"unsupported provider type: {provider_type}"}