feat: add filtering to all entity list pages

- Tracking configs: filter by name + provider type
- Template configs: filter by name + provider type
- Command configs: filter by name + provider type
- Notification trackers: filter by name + provider
- Command trackers: filter by name + provider
- Targets: filter by name (type filtering already existed)
- Nav badge counts include system-owned entities (user_id=0)
- Shows "no items match filter" vs "no items yet" empty states

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

@@ -132,10 +132,12 @@ async def get_nav_counts(
         )).one()
         counts[key] = count
 
-    # System-owned templates (user_id=0) count as well
+    # System-owned entities (user_id=0) count as well
     for model, key in [
         (TemplateConfig, "template_configs"),
         (CommandTemplateConfig, "command_template_configs"),
+        (TrackingConfig, "tracking_configs"),
+        (CommandConfig, "command_configs"),
     ]:
         system_count = (await session.exec(
             select(func.count()).select_from(model).where(model.user_id == 0)