feat: Add lyrics ID mapping system, fix playlist display, enhance track view

- Add complete lyrics ID mapping system with Redis cache, file persistence, and cache warming
- Manual lyrics mappings checked FIRST before automatic search in LrclibService
- Add lyrics status badge to track view (blue badge shows when lyrics are cached)
- Enhance search links to show 'Search: Track Title - Artist Name'
- Fix Active Playlists tab to read from .env file directly (shows all 18 playlists now)
- Add Map Lyrics ID button to every track with modal for entering lrclib.net IDs
- Add POST /api/admin/lyrics/map and GET /api/admin/lyrics/mappings endpoints
- Lyrics mappings stored in /app/cache/lyrics_mappings.json with no expiration
- Cache warming loads lyrics mappings on startup
- All mappings follow same pattern as track mappings (Redis + file + warming)

allstarr/Controllers/AdminController.cs

@@ -215,7 +215,11 @@ public class AdminController : ControllerBase
     {
         var playlists = new List<object>();
         
-        foreach (var config in _spotifyImportSettings.Playlists)
+        // Read playlists directly from .env file to get the latest configuration
+        // (IOptions is cached and doesn't reload after .env changes)
+        var configuredPlaylists = await ReadPlaylistsFromEnvFile();
+        
+        foreach (var config in configuredPlaylists)
         {
             var playlistInfo = new Dictionary<string, object?>
             {
@@ -728,6 +732,11 @@ public class AdminController : ControllerBase
                                 }
                             }
                             
+                            // Check lyrics status
+                            var cacheKey = $"lyrics:{track.PrimaryArtist}:{track.Title}:{track.Album}:{track.DurationMs / 1000}";
+                            var existingLyrics = await _cache.GetStringAsync(cacheKey);
+                            var hasLyrics = !string.IsNullOrEmpty(existingLyrics);
+                            
                             tracksWithStatus.Add(new
                             {
                                 position = track.Position,
@@ -743,7 +752,8 @@ public class AdminController : ControllerBase
                                 searchQuery = isLocal != true ? $"{track.Title} {track.PrimaryArtist}" : null, // Set for both external and missing
                                 isManualMapping = isManualMapping,
                                 manualMappingType = manualMappingType,
-                                manualMappingId = manualMappingId
+                                manualMappingId = manualMappingId,
+                                hasLyrics = hasLyrics
                             });
                         }
                         
@@ -2720,6 +2730,165 @@ public class AdminController : ControllerBase
         }
     }
     
+    /// <summary>
+    /// Save lyrics mapping to file for persistence across restarts.
+    /// Lyrics mappings NEVER expire - they are permanent user decisions.
+    /// </summary>
+    private async Task SaveLyricsMappingToFileAsync(
+        string artist,
+        string title,
+        string album,
+        int durationSeconds,
+        int lyricsId)
+    {
+        try
+        {
+            var mappingsFile = "/app/cache/lyrics_mappings.json";
+            
+            // Load existing mappings
+            var mappings = new List<LyricsMappingEntry>();
+            if (System.IO.File.Exists(mappingsFile))
+            {
+                var json = await System.IO.File.ReadAllTextAsync(mappingsFile);
+                mappings = JsonSerializer.Deserialize<List<LyricsMappingEntry>>(json) 
+                    ?? new List<LyricsMappingEntry>();
+            }
+            
+            // Remove any existing mapping for this track
+            mappings.RemoveAll(m => 
+                m.Artist.Equals(artist, StringComparison.OrdinalIgnoreCase) && 
+                m.Title.Equals(title, StringComparison.OrdinalIgnoreCase));
+            
+            // Add new mapping
+            mappings.Add(new LyricsMappingEntry
+            {
+                Artist = artist,
+                Title = title,
+                Album = album,
+                DurationSeconds = durationSeconds,
+                LyricsId = lyricsId,
+                CreatedAt = DateTime.UtcNow
+            });
+            
+            // Save back to file
+            var updatedJson = JsonSerializer.Serialize(mappings, new JsonSerializerOptions { WriteIndented = true });
+            await System.IO.File.WriteAllTextAsync(mappingsFile, updatedJson);
+            
+            _logger.LogDebug("💾 Saved lyrics mapping to file: {Artist} - {Title} → Lyrics ID {LyricsId}", 
+                artist, title, lyricsId);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to save lyrics mapping to file for {Artist} - {Title}", artist, title);
+        }
+    }
+    
+    /// <summary>
+    /// Save manual lyrics ID mapping for a track
+    /// </summary>
+    [HttpPost("lyrics/map")]
+    public async Task<IActionResult> SaveLyricsMapping([FromBody] LyricsMappingRequest request)
+    {
+        if (string.IsNullOrWhiteSpace(request.Artist) || string.IsNullOrWhiteSpace(request.Title))
+        {
+            return BadRequest(new { error = "Artist and Title are required" });
+        }
+        
+        if (request.LyricsId <= 0)
+        {
+            return BadRequest(new { error = "Valid LyricsId is required" });
+        }
+        
+        try
+        {
+            // Store lyrics mapping in cache (NO EXPIRATION - manual mappings are permanent)
+            var mappingKey = $"lyrics:manual-map:{request.Artist}:{request.Title}";
+            await _cache.SetStringAsync(mappingKey, request.LyricsId.ToString());
+            
+            // Also save to file for persistence across restarts
+            await SaveLyricsMappingToFileAsync(request.Artist, request.Title, request.Album ?? "", request.DurationSeconds, request.LyricsId);
+            
+            _logger.LogInformation("Manual lyrics mapping saved: {Artist} - {Title} → Lyrics ID {LyricsId}", 
+                request.Artist, request.Title, request.LyricsId);
+            
+            // Optionally fetch and cache the lyrics immediately
+            try
+            {
+                var lyricsService = _serviceProvider.GetService<allstarr.Services.Lyrics.LrclibService>();
+                if (lyricsService != null)
+                {
+                    var lyricsInfo = await lyricsService.GetLyricsByIdAsync(request.LyricsId);
+                    if (lyricsInfo != null && !string.IsNullOrEmpty(lyricsInfo.PlainLyrics))
+                    {
+                        // Cache the lyrics using the standard cache key
+                        var lyricsCacheKey = $"lyrics:{request.Artist}:{request.Title}:{request.Album ?? ""}:{request.DurationSeconds}";
+                        await _cache.SetAsync(lyricsCacheKey, lyricsInfo.PlainLyrics);
+                        _logger.LogInformation("✓ Fetched and cached lyrics for {Artist} - {Title}", request.Artist, request.Title);
+                        
+                        return Ok(new 
+                        { 
+                            message = "Lyrics mapping saved and lyrics cached successfully",
+                            lyricsId = request.LyricsId,
+                            cached = true,
+                            lyrics = new
+                            {
+                                id = lyricsInfo.Id,
+                                trackName = lyricsInfo.TrackName,
+                                artistName = lyricsInfo.ArtistName,
+                                albumName = lyricsInfo.AlbumName,
+                                duration = lyricsInfo.Duration,
+                                instrumental = lyricsInfo.Instrumental
+                            }
+                        });
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex, "Failed to fetch lyrics after mapping, but mapping was saved");
+            }
+            
+            return Ok(new 
+            { 
+                message = "Lyrics mapping saved successfully",
+                lyricsId = request.LyricsId,
+                cached = false
+            });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to save lyrics mapping");
+            return StatusCode(500, new { error = "Failed to save lyrics mapping" });
+        }
+    }
+    
+    /// <summary>
+    /// Get manual lyrics mappings
+    /// </summary>
+    [HttpGet("lyrics/mappings")]
+    public async Task<IActionResult> GetLyricsMappings()
+    {
+        try
+        {
+            var mappingsFile = "/app/cache/lyrics_mappings.json";
+            
+            if (!System.IO.File.Exists(mappingsFile))
+            {
+                return Ok(new { mappings = new List<object>() });
+            }
+            
+            var json = await System.IO.File.ReadAllTextAsync(mappingsFile);
+            var mappings = JsonSerializer.Deserialize<List<LyricsMappingEntry>>(json) ?? new List<LyricsMappingEntry>();
+            
+            return Ok(new { mappings });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to get lyrics mappings");
+            return StatusCode(500, new { error = "Failed to get lyrics mappings" });
+        }
+    }
+    
     /// <summary>
     /// Prefetch lyrics for a specific playlist
     /// </summary>
@@ -2771,6 +2940,15 @@ public class ManualMappingRequest
     public string? ExternalId { get; set; }
 }
 
+public class LyricsMappingRequest
+{
+    public string Artist { get; set; } = "";
+    public string Title { get; set; } = "";
+    public string? Album { get; set; }
+    public int DurationSeconds { get; set; }
+    public int LyricsId { get; set; }
+}
+
 public class ManualMappingEntry
 {
     public string SpotifyId { get; set; } = "";
@@ -2780,6 +2958,16 @@ public class ManualMappingEntry
     public DateTime CreatedAt { get; set; }
 }
 
+public class LyricsMappingEntry
+{
+    public string Artist { get; set; } = "";
+    public string Title { get; set; } = "";
+    public string? Album { get; set; }
+    public int DurationSeconds { get; set; }
+    public int LyricsId { get; set; }
+    public DateTime CreatedAt { get; set; }
+}
+
 public class ConfigUpdateRequest
 {
     public Dictionary<string, string> Updates { get; set; } = new();

allstarr/Services/Common/CacheWarmingService.cs

@@ -36,6 +36,7 @@ public class CacheWarmingService : IHostedService
         var playlistsWarmed = 0;
         var mappingsWarmed = 0;
         var lyricsWarmed = 0;
+        var lyricsMappingsWarmed = 0;
 
         try
         {
@@ -48,13 +49,16 @@ public class CacheWarmingService : IHostedService
             // Warm manual mappings cache
             mappingsWarmed = await WarmManualMappingsCacheAsync(cancellationToken);
             
+            // Warm lyrics mappings cache
+            lyricsMappingsWarmed = await WarmLyricsMappingsCacheAsync(cancellationToken);
+            
             // Warm lyrics cache
             lyricsWarmed = await WarmLyricsCacheAsync(cancellationToken);
 
             var duration = DateTime.UtcNow - startTime;
             _logger.LogInformation(
-                "✅ Cache warming complete in {Duration:F1}s: {Genres} genres, {Playlists} playlists, {Mappings} manual mappings, {Lyrics} lyrics",
+                "✅ Cache warming complete in {Duration:F1}s: {Genres} genres, {Playlists} playlists, {Mappings} manual mappings, {LyricsMappings} lyrics mappings, {Lyrics} lyrics",
-                duration.TotalSeconds, genresWarmed, playlistsWarmed, mappingsWarmed, lyricsWarmed);
+                duration.TotalSeconds, genresWarmed, playlistsWarmed, mappingsWarmed, lyricsMappingsWarmed, lyricsWarmed);
         }
         catch (Exception ex)
         {
@@ -284,6 +288,48 @@ public class CacheWarmingService : IHostedService
         return warmedCount;
     }
     
+    /// <summary>
+    /// Warms lyrics mappings cache from file system.
+    /// Lyrics mappings NEVER expire - they are permanent user decisions.
+    /// </summary>
+    private async Task<int> WarmLyricsMappingsCacheAsync(CancellationToken cancellationToken)
+    {
+        var mappingsFile = "/app/cache/lyrics_mappings.json";
+        
+        if (!File.Exists(mappingsFile))
+        {
+            return 0;
+        }
+
+        try
+        {
+            var json = await File.ReadAllTextAsync(mappingsFile, cancellationToken);
+            var mappings = JsonSerializer.Deserialize<List<LyricsMappingEntry>>(json);
+
+            if (mappings != null && mappings.Count > 0)
+            {
+                foreach (var mapping in mappings)
+                {
+                    if (cancellationToken.IsCancellationRequested)
+                        break;
+
+                    // Store in Redis with NO EXPIRATION (permanent)
+                    var redisKey = $"lyrics:manual-map:{mapping.Artist}:{mapping.Title}";
+                    await _cache.SetStringAsync(redisKey, mapping.LyricsId.ToString());
+                }
+
+                _logger.LogInformation("🔥 Warmed {Count} lyrics mappings from file system", mappings.Count);
+                return mappings.Count;
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to warm lyrics mappings from file: {File}", mappingsFile);
+        }
+
+        return 0;
+    }
+    
     /// <summary>
     /// Warms lyrics cache from file system using the LyricsPrefetchService.
     /// </summary>
@@ -341,4 +387,14 @@ public class CacheWarmingService : IHostedService
         public string? ExternalId { get; set; }
         public DateTime CreatedAt { get; set; }
     }
+    
+    private class LyricsMappingEntry
+    {
+        public string Artist { get; set; } = "";
+        public string Title { get; set; } = "";
+        public string? Album { get; set; }
+        public int DurationSeconds { get; set; }
+        public int LyricsId { get; set; }
+        public DateTime CreatedAt { get; set; }
+    }
 }

allstarr/Services/Lyrics/LrclibService.cs

@@ -33,6 +33,31 @@ public class LrclibService
         var artistName = string.Join(", ", artistNames);
         var cacheKey = $"lyrics:{artistName}:{trackName}:{albumName}:{durationSeconds}";
         
+        // FIRST: Check for manual lyrics mapping
+        var manualMappingKey = $"lyrics:manual-map:{artistName}:{trackName}";
+        var manualLyricsIdStr = await _cache.GetStringAsync(manualMappingKey);
+        
+        if (!string.IsNullOrEmpty(manualLyricsIdStr) && int.TryParse(manualLyricsIdStr, out var manualLyricsId) && manualLyricsId > 0)
+        {
+            _logger.LogInformation("✓ Manual lyrics mapping found for {Artist} - {Track}: Lyrics ID {Id}", 
+                artistName, trackName, manualLyricsId);
+            
+            // Fetch lyrics by ID
+            var manualLyrics = await GetLyricsByIdAsync(manualLyricsId);
+            if (manualLyrics != null && !string.IsNullOrEmpty(manualLyrics.PlainLyrics))
+            {
+                // Cache the lyrics using the standard cache key
+                await _cache.SetAsync(cacheKey, manualLyrics.PlainLyrics!);
+                return manualLyrics;
+            }
+            else
+            {
+                _logger.LogWarning("Manual lyrics mapping points to invalid ID {Id} for {Artist} - {Track}", 
+                    manualLyricsId, artistName, trackName);
+            }
+        }
+        
+        // SECOND: Check standard cache
         var cached = await _cache.GetStringAsync(cacheKey);
         if (!string.IsNullOrEmpty(cached))
         {

allstarr/wwwroot/index.html

@@ -1000,6 +1000,45 @@
         </div>
     </div>
     
+    <!-- Lyrics ID Mapping Modal -->
+    <div class="modal" id="lyrics-map-modal">
+        <div class="modal-content" style="max-width: 600px;">
+            <h3>Map Lyrics ID</h3>
+            <p style="color: var(--text-secondary); margin-bottom: 16px;">
+                Manually map a track to a specific lyrics ID from lrclib.net. You can find lyrics IDs by searching on <a href="https://lrclib.net" target="_blank" style="color: var(--accent);">lrclib.net</a>.
+            </p>
+            
+            <!-- Track Info -->
+            <div class="form-group">
+                <label>Track</label>
+                <div style="background: var(--bg-primary); padding: 12px; border-radius: 8px; margin-bottom: 16px;">
+                    <strong id="lyrics-map-title"></strong><br>
+                    <span style="color: var(--text-secondary);" id="lyrics-map-artist"></span><br>
+                    <small style="color: var(--text-secondary);" id="lyrics-map-album"></small>
+                </div>
+            </div>
+            
+            <!-- Lyrics ID Input -->
+            <div class="form-group">
+                <label>Lyrics ID from lrclib.net</label>
+                <input type="number" id="lyrics-map-id" placeholder="Enter lyrics ID (e.g., 5929990)" min="1">
+                <small style="color: var(--text-secondary); display: block; margin-top: 4px;">
+                    Search for the track on <a href="https://lrclib.net" target="_blank" style="color: var(--accent);">lrclib.net</a> and copy the ID from the URL or API response
+                </small>
+            </div>
+            
+            <input type="hidden" id="lyrics-map-artist-value">
+            <input type="hidden" id="lyrics-map-title-value">
+            <input type="hidden" id="lyrics-map-album-value">
+            <input type="hidden" id="lyrics-map-duration">
+            
+            <div class="modal-actions">
+                <button onclick="closeModal('lyrics-map-modal')">Cancel</button>
+                <button class="primary" onclick="saveLyricsMapping()" id="lyrics-map-save-btn">Save Mapping</button>
+            </div>
+        </div>
+    </div>
+    
     <!-- Restart Overlay -->
     <div class="restart-overlay" id="restart-overlay">
         <div class="spinner-large"></div>
@@ -1830,6 +1869,12 @@
                 document.getElementById('tracks-list').innerHTML = data.tracks.map(t => {
                     let statusBadge = '';
                     let mapButton = '';
+                    let lyricsBadge = '';
+                    
+                    // Add lyrics status badge
+                    if (t.hasLyrics) {
+                        lyricsBadge = '<span class="status-badge" style="font-size:0.75rem;padding:2px 8px;margin-left:4px;background:#3b82f6;color:white;"><span class="status-dot" style="background:white;"></span>Lyrics</span>';
+                    }
                     
                     if (t.isLocal === true) {
                         statusBadge = '<span class="status-badge success" style="font-size:0.75rem;padding:2px 8px;margin-left:8px;"><span class="status-dot"></span>Local</span>';
@@ -1881,18 +1926,26 @@
                             style="margin-left:4px;font-size:0.75rem;padding:4px 8px;background:var(--warning);border-color:var(--warning);">Map to External</button>`;
                     }
                     
+                    // Build search link with track name and artist
+                    const firstArtist = (t.artists && t.artists.length > 0) ? t.artists[0] : '';
+                    const searchLinkText = `${t.title} - ${firstArtist}`;
+                    const durationSeconds = Math.floor((t.durationMs || 0) / 1000);
+                    
+                    // Add lyrics mapping button
+                    const lyricsMapButton = `<button class="small" onclick="openLyricsMap('${escapeJs(firstArtist)}', '${escapeJs(t.title)}', '${escapeJs(t.album || '')}', ${durationSeconds})" style="margin-left:4px;font-size:0.75rem;padding:4px 8px;background:#3b82f6;border-color:#3b82f6;color:white;">Map Lyrics ID</button>`;
+                    
                     return `
                         <div class="track-item" data-position="${t.position}">
                             <span class="track-position">${t.position + 1}</span>
                             <div class="track-info">
-                                <h4>${escapeHtml(t.title)}${statusBadge}${mapButton}</h4>
+                                <h4>${escapeHtml(t.title)}${statusBadge}${lyricsBadge}${mapButton}${lyricsMapButton}</h4>
                                 <span class="artists">${escapeHtml((t.artists || []).join(', '))}</span>
                             </div>
                             <div class="track-meta">
                                 ${t.album ? escapeHtml(t.album) : ''}
                                 ${t.isrc ? '<br><small>ISRC: ' + t.isrc + '</small>' : ''}
-                                ${t.isLocal === false && t.searchQuery && t.externalProvider ? '<br><small style="color:var(--accent)"><a href="#" onclick="searchProvider(\'' + escapeJs(t.searchQuery) + '\', \'' + escapeJs(t.externalProvider) + '\'); return false;" style="color:var(--accent);text-decoration:underline;">🔍 Search</a></small>' : ''}
+                                ${t.isLocal === false && t.searchQuery && t.externalProvider ? '<br><small style="color:var(--accent)"><a href="#" onclick="searchProvider(\'' + escapeJs(t.searchQuery) + '\', \'' + escapeJs(t.externalProvider) + '\'); return false;" style="color:var(--accent);text-decoration:underline;">🔍 Search: ' + escapeHtml(searchLinkText) + '</a></small>' : ''}
-                                ${t.isLocal === null && t.searchQuery ? '<br><small style="color:var(--text-secondary)"><a href="#" onclick="searchProvider(\'' + escapeJs(t.searchQuery) + '\', \'squidwtf\'); return false;" style="color:var(--text-secondary);text-decoration:underline;">🔍 Search</a></small>' : ''}
+                                ${t.isLocal === null && t.searchQuery ? '<br><small style="color:var(--text-secondary)"><a href="#" onclick="searchProvider(\'' + escapeJs(t.searchQuery) + '\', \'squidwtf\'); return false;" style="color:var(--text-secondary);text-decoration:underline;">🔍 Search: ' + escapeHtml(searchLinkText) + '</a></small>' : ''}
                             </div>
                         </div>
                     `;
@@ -2380,6 +2433,70 @@
             return text.replace(/\\/g, '\\\\').replace(/'/g, "\\'").replace(/"/g, '\\"');
         }
         
+        // Lyrics ID mapping functions
+        function openLyricsMap(artist, title, album, durationSeconds) {
+            document.getElementById('lyrics-map-artist').textContent = artist;
+            document.getElementById('lyrics-map-title').textContent = title;
+            document.getElementById('lyrics-map-album').textContent = album || '(No album)';
+            document.getElementById('lyrics-map-artist-value').value = artist;
+            document.getElementById('lyrics-map-title-value').value = title;
+            document.getElementById('lyrics-map-album-value').value = album || '';
+            document.getElementById('lyrics-map-duration').value = durationSeconds;
+            document.getElementById('lyrics-map-id').value = '';
+            
+            openModal('lyrics-map-modal');
+        }
+        
+        async function saveLyricsMapping() {
+            const artist = document.getElementById('lyrics-map-artist-value').value;
+            const title = document.getElementById('lyrics-map-title-value').value;
+            const album = document.getElementById('lyrics-map-album-value').value;
+            const durationSeconds = parseInt(document.getElementById('lyrics-map-duration').value);
+            const lyricsId = parseInt(document.getElementById('lyrics-map-id').value);
+            
+            if (!lyricsId || lyricsId <= 0) {
+                showToast('Please enter a valid lyrics ID', 'error');
+                return;
+            }
+            
+            const saveBtn = document.getElementById('lyrics-map-save-btn');
+            const originalText = saveBtn.textContent;
+            saveBtn.textContent = 'Saving...';
+            saveBtn.disabled = true;
+            
+            try {
+                const res = await fetch('/api/admin/lyrics/map', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({
+                        artist,
+                        title,
+                        album,
+                        durationSeconds,
+                        lyricsId
+                    })
+                });
+                
+                const data = await res.json();
+                
+                if (res.ok) {
+                    if (data.cached && data.lyrics) {
+                        showToast(`✓ Lyrics mapped and cached: ${data.lyrics.trackName} by ${data.lyrics.artistName}`, 'success', 5000);
+                    } else {
+                        showToast('✓ Lyrics mapping saved successfully', 'success');
+                    }
+                    closeModal('lyrics-map-modal');
+                } else {
+                    showToast(data.error || 'Failed to save lyrics mapping', 'error');
+                }
+            } catch (error) {
+                showToast('Failed to save lyrics mapping', 'error');
+            } finally {
+                saveBtn.textContent = originalText;
+                saveBtn.disabled = false;
+            }
+        }
+        
         // Initial load
         fetchStatus();
         fetchPlaylists();