Release v1.3.0: Multi-source downloads, audio analyzer resilience, mobile improvements

Major Features:
- Multi-source download system (Soulseek/Lidarr with fallback)
- Configurable enrichment speed control (1-5x)
- Mobile touch drag support for seek sliders
- iOS PWA media controls (Control Center, Lock Screen)
- Artist name alias resolution via Last.fm
- Circuit breaker pattern for audio analysis

Critical Fixes:
- Audio analyzer stability (non-ASCII, BrokenProcessPool, OOM)
- Discovery system race conditions and import failures
- Radio decade categorization using originalYear
- LastFM API response normalization
- Mood bucket infinite loop prevention

Security:
- Bull Board admin authentication
- Lidarr webhook signature verification
- JWT token expiration and refresh
- Encryption key validation on startup

Closes #2, #6, #9, #13, #21, #26, #31, #34, #35, #37, #40, #43

frontend/features/settings/hooks/useSystemSettings.ts

@@ -12,6 +12,7 @@ const defaultSystemSettings: SystemSettings = {
     openaiModel: "gpt-4",
     fanartEnabled: false,
     fanartApiKey: "",
+    lastfmApiKey: "",
     audiobookshelfEnabled: false,
     audiobookshelfUrl: "http://localhost:13378",
     audiobookshelfApiKey: "",
@@ -25,9 +26,11 @@ const defaultSystemSettings: SystemSettings = {
     maxCacheSizeMb: 10240,
     autoSync: true,
     autoEnrichMetadata: true,
+    audioAnalyzerWorkers: 2,
+    soulseekConcurrentDownloads: 4,
     // Download preferences
     downloadSource: "soulseek",
-    soulseekFallback: "none",
+    primaryFailureFallback: "none",
 };
 
 export function useSystemSettings() {
@@ -167,6 +170,9 @@ export function useSystemSettings() {
                 case "fanart":
                     result = await api.testFanart(systemSettings.fanartApiKey);
                     break;
+                case "lastfm":
+                    result = await api.testLastfm(systemSettings.lastfmApiKey);
+                    break;
                 case "audiobookshelf":
                     result = await api.testAudiobookshelf(
                         systemSettings.audiobookshelfUrl,