feat(tracking): per-config quiet hours with app-level IANA timezone

Add quiet_hours_enabled/start/end to TrackingConfig (HH:MM strings
interpreted in the app-level timezone AppSetting). The dispatch path
loads the app timezone once per run and passes it through
event_allowed_by_config -> in_quiet_hours, so overnight windows like
22:00-07:00 work correctly in any IANA tz.

Frontend exposes a Timezone field under Settings and a Quiet Hours
section on the Immich tracking-config form with time-picker inputs.

packages/server/src/notify_bridge_server/api/app_settings.py

@@ -22,6 +22,7 @@ _SETTING_KEYS = {
     "telegram_webhook_secret": "NOTIFY_BRIDGE_TELEGRAM_WEBHOOK_SECRET",
     "telegram_cache_ttl_hours": None,  # no env fallback, default 48
     "supported_locales": None,  # comma-separated locale codes
+    "timezone": "NOTIFY_BRIDGE_TIMEZONE",  # IANA tz (e.g. "Europe/Warsaw"); empty = UTC
 }
 
 _DEFAULTS = {
@@ -29,6 +30,7 @@ _DEFAULTS = {
     "telegram_webhook_secret": "",
     "telegram_cache_ttl_hours": "48",
     "supported_locales": "en,ru",
+    "timezone": "UTC",
 }
 
 
@@ -50,6 +52,7 @@ class SettingsUpdate(BaseModel):
     telegram_webhook_secret: str | None = None
     telegram_cache_ttl_hours: str | None = None
     supported_locales: str | None = None
+    timezone: str | None = None
 
 
 @router.get("")

packages/server/src/notify_bridge_server/api/tracking_configs.py

@@ -54,6 +54,9 @@ class TrackingConfigCreate(BaseModel):
     memory_favorite_only: bool = False
     memory_asset_type: str = "all"
     memory_min_rating: int = 0
+    quiet_hours_enabled: bool = False
+    quiet_hours_start: str | None = None
+    quiet_hours_end: str | None = None
 
 
 class TrackingConfigUpdate(BaseModel):
@@ -93,6 +96,9 @@ class TrackingConfigUpdate(BaseModel):
     memory_favorite_only: bool | None = None
     memory_asset_type: str | None = None
     memory_min_rating: int | None = None
+    quiet_hours_enabled: bool | None = None
+    quiet_hours_start: str | None = None
+    quiet_hours_end: str | None = None
 
 
 @router.get("")

packages/server/src/notify_bridge_server/api/webhooks.py

@@ -27,7 +27,11 @@ from ..database.models import (
     ServiceProvider,
     WebhookPayloadLog,
 )
-from ..services.dispatch_helpers import event_allowed_by_config, load_link_data
+from ..services.dispatch_helpers import (
+    event_allowed_by_config,
+    get_app_timezone,
+    load_link_data,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -144,6 +148,8 @@ async def _dispatch_webhook_event(
             if not link_data:
                 continue
 
+            app_tz = await get_app_timezone(session)
+
             # Log event
             extra_details = {k: v for k, v in event.extra.items() if k in detail_keys}
             session.add(EventLog(
@@ -164,7 +170,7 @@ async def _dispatch_webhook_event(
 
             # Dispatch to targets
             dispatcher = NotificationDispatcher()
-            target_configs = _build_target_configs(event, link_data, provider_config)
+            target_configs = _build_target_configs(event, link_data, provider_config, app_tz)
             if target_configs:
                 results = await dispatcher.dispatch(event, target_configs)
                 for r in results:
@@ -513,12 +519,13 @@ def _build_target_configs(
     event: ServiceEvent,
     link_data: list[dict[str, Any]],
     provider_config: dict[str, Any],
+    app_tz: str = "UTC",
 ) -> list[TargetConfig]:
     """Build TargetConfig objects for dispatch, applying tracking config filters."""
     target_configs: list[TargetConfig] = []
     for ld in link_data:
         tc = ld["tracking_config"]
-        if tc and not event_allowed_by_config(event, tc):
+        if tc and not event_allowed_by_config(event, tc, app_tz):
             continue
 
         tmpl = ld["template_config"]