feat: add editable search input to Prowlarr modal with scrollable badges

- Add text input for custom search queries in Prowlarr modal
- Quick search badges pre-fill the input and trigger search
- Default query uses quoted series name for exact match
- Add custom_query support to backend API
- Limit badge area height with vertical scroll
- Add debug logging for Prowlarr API responses

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/backoffice/lib/i18n/en.ts

@@ -487,6 +487,8 @@ const en: Record<TranslationKey, string> = {
   "prowlarr.columnSeeders": "Seeds",
   "prowlarr.columnLeechers": "Peers",
   "prowlarr.columnProtocol": "Protocol",
+  "prowlarr.searchPlaceholder": "Edit search query...",
+  "prowlarr.searchAction": "Search",
   "prowlarr.searchError": "Search failed",
   "prowlarr.notConfigured": "Prowlarr is not configured",
   "prowlarr.download": "Download",