feat: add recent access history, artist screen redesign, and extension improvements

Recent Access History:
- Quick access to recently visited artists, albums, playlists, and tracks
- Tap search bar to show recent access list
- Stays visible after keyboard dismiss, exit with back button
- Persists across app restarts (SharedPreferences)
- X button to remove items, Clear All button for all

Artist Screen Redesign:
- Full-width header image with gradient overlay
- Monthly listeners display with compact notation
- Popular section with top 5 tracks and download status
- Extension artists skip Spotify/Deezer fetch (no rate limit errors)

Go Backend:
- GetArtistWithExtensionJSON now returns top_tracks, header_image, listeners

Bug Fixes:
- Search bar unfocus when tapping outside
- Keyboard not appearing on Settings navigation return
- Recent access artist navigation uses correct screen for extensions
- Extension artist screen correctly parses and forwards top tracks

Localization:
- Added recentPlaylistInfo, errorGeneric strings
- Multi-language support via Crowdin

Extensions:
- YT Music: v1.5.0 (top_tracks in getArtist)
- Spotify Web: v1.6.0

go_backend/exports.go

@@ -1657,10 +1657,12 @@ func HandleURLWithExtensionJSON(url string) (string, error) {
 	// Add artist info if present
 	if result.Artist != nil {
 		artistResponse := map[string]interface{}{
-			"id":          result.Artist.ID,
-			"name":        result.Artist.Name,
-			"image_url":   result.Artist.ImageURL,
-			"provider_id": result.Artist.ProviderID,
+			"id":           result.Artist.ID,
+			"name":         result.Artist.Name,
+			"image_url":    result.Artist.ImageURL,
+			"header_image": result.Artist.HeaderImage,
+			"listeners":    result.Artist.Listeners,
+			"provider_id":  result.Artist.ProviderID,
 		}
 
 		// Add albums if present
@@ -1686,6 +1688,29 @@ func HandleURLWithExtensionJSON(url string) (string, error) {
 			artistResponse["albums"] = albums
 		}
 
+		// Add top tracks if present
+		if len(result.Artist.TopTracks) > 0 {
+			topTracks := make([]map[string]interface{}, len(result.Artist.TopTracks))
+			for i, track := range result.Artist.TopTracks {
+				topTracks[i] = map[string]interface{}{
+					"id":           track.ID,
+					"name":         track.Name,
+					"artists":      track.Artists,
+					"album_name":   track.AlbumName,
+					"album_artist": track.AlbumArtist,
+					"duration_ms":  track.DurationMS,
+					"images":       track.ResolvedCoverURL(),
+					"release_date": track.ReleaseDate,
+					"track_number": track.TrackNumber,
+					"disc_number":  track.DiscNumber,
+					"isrc":         track.ISRC,
+					"provider_id":  track.ProviderID,
+					"spotify_id":   track.SpotifyID,
+				}
+			}
+			artistResponse["top_tracks"] = topTracks
+		}
+
 		response["artist"] = artistResponse
 	}
 
@@ -1920,6 +1945,39 @@ func GetArtistWithExtensionJSON(extensionID, artistID string) (string, error) {
 		"provider_id": artist.ProviderID,
 	}
 
+	// Add header image if present
+	if artist.HeaderImage != "" {
+		response["header_image"] = artist.HeaderImage
+	}
+
+	// Add listeners if present
+	if artist.Listeners > 0 {
+		response["listeners"] = artist.Listeners
+	}
+
+	// Add top tracks if present
+	if len(artist.TopTracks) > 0 {
+		topTracks := make([]map[string]interface{}, len(artist.TopTracks))
+		for i, track := range artist.TopTracks {
+			topTracks[i] = map[string]interface{}{
+				"id":           track.ID,
+				"name":         track.Name,
+				"artists":      track.Artists,
+				"album_name":   track.AlbumName,
+				"album_artist": track.AlbumArtist,
+				"duration_ms":  track.DurationMS,
+				"images":       track.ResolvedCoverURL(),
+				"release_date": track.ReleaseDate,
+				"track_number": track.TrackNumber,
+				"disc_number":  track.DiscNumber,
+				"isrc":         track.ISRC,
+				"provider_id":  track.ProviderID,
+				"spotify_id":   track.SpotifyID,
+			}
+		}
+		response["top_tracks"] = topTracks
+	}
+
 	jsonBytes, err := json.Marshal(response)
 	if err != nil {
 		return "", err

go_backend/extension_providers.go

@@ -30,7 +30,7 @@ type ExtTrackMetadata struct {
 	DiscNumber  int    `json:"disc_number,omitempty"`
 	ISRC        string `json:"isrc,omitempty"`
 	ProviderID  string `json:"provider_id"`
-	ItemType    string `json:"item_type,omitempty"` // track, album, or playlist - for extension search results
+	ItemType    string `json:"item_type,omitempty"`  // track, album, or playlist - for extension search results
 	AlbumType   string `json:"album_type,omitempty"` // album, single, ep, compilation
 	// Enrichment fields from Odesli/song.link
 	TidalID       string            `json:"tidal_id,omitempty"`
@@ -63,11 +63,14 @@ type ExtAlbumMetadata struct {
 
 // ExtArtistMetadata represents artist metadata from an extension
 type ExtArtistMetadata struct {
-	ID         string             `json:"id"`
-	Name       string             `json:"name"`
-	ImageURL   string             `json:"image_url,omitempty"`
-	Albums     []ExtAlbumMetadata `json:"albums,omitempty"`
-	ProviderID string             `json:"provider_id"`
+	ID          string             `json:"id"`
+	Name        string             `json:"name"`
+	ImageURL    string             `json:"image_url,omitempty"`
+	HeaderImage string             `json:"header_image,omitempty"` // Header image for artist page background
+	Listeners   int                `json:"listeners,omitempty"`    // Monthly listeners
+	Albums      []ExtAlbumMetadata `json:"albums,omitempty"`
+	TopTracks   []ExtTrackMetadata `json:"top_tracks,omitempty"` // Popular tracks
+	ProviderID  string             `json:"provider_id"`
 }
 
 // ExtSearchResult represents search results from an extension
@@ -1252,6 +1255,10 @@ func (p *ExtensionProviderWrapper) HandleURL(url string) (*ExtURLHandleResult, e
 				handleResult.Artist.Albums[i].Tracks[j].ProviderID = p.extension.ID
 			}
 		}
+		// Set provider ID on top tracks
+		for i := range handleResult.Artist.TopTracks {
+			handleResult.Artist.TopTracks[i].ProviderID = p.extension.ID
+		}
 	}
 
 	return &handleResult, nil