feat: add built-in Tidal/Qobuz search with recommended service picker

- Add SearchAll() for Tidal and Qobuz in Go backend (tracks, artists, albums)
- Add searchTidalAll/searchQobuzAll platform routing for Android and iOS
- Add Tidal/Qobuz options to search provider dropdown in home tab
- Show (Recommended) label and auto-select service in download picker

pubspec.yaml

@@ -27,6 +27,7 @@ dependencies:
   path_provider: ^2.1.5
   path: ^1.9.0
   sqflite: ^2.4.1
+  sqflite_common_ffi: ^2.3.6
 
 # HTTP & Network
   http: ^1.6.0