feat: Add Ombi request filtering and search

- Add request filters UI (type, status, sort, search)
- Implement dual-layer filtering (server + client)
- Add ombiFilters utility for consistent filtering logic
- Persist filter preferences in localStorage
- Add SSE support for real-time Ombi request updates
- Add webhook endpoints for Ombi integration
- Update OpenAPI spec for new endpoints
- Add unit tests for filter logic and UI
- Add integration tests for Ombi routes

client/src/state.js

@@ -31,7 +31,13 @@ export const state = {
   sonarrWebhook: { enabled: false, triggers: { onGrab: false, onDownload: false, onImport: false, onUpgrade: false }, stats: null },
   radarrWebhook: { enabled: false, triggers: { onGrab: false, onDownload: false, onImport: false, onUpgrade: false }, stats: null },
   ombiWebhook: { enabled: false, triggers: { requestAvailable: false, requestApproved: false, requestDeclined: false, requestPending: false, requestProcessing: false }, stats: null },
-  webhookMetrics: null
+  webhookMetrics: null,
+
+  // Request filter state
+  selectedRequestTypes: ['movie', 'tv'],
+  selectedRequestStatuses: [],
+  requestSortMode: 'requestedDate_desc',
+  requestSearchQuery: ''
 };
 
 // Constants