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/lib/query-events.ts

@@ -0,0 +1,65 @@
+/**
+ * Query Events - Typed event system for cache invalidation
+ * 
+ * Provides a type-safe wrapper around CustomEvent for triggering React Query cache invalidation.
+ * Events are dispatched when data changes and listeners refetch queries to update the UI.
+ */
+
+/**
+ * Available query event types
+ */
+export type QueryEventType =
+    | "audiobook-progress-updated"
+    | "podcast-progress-updated"
+    | "library-updated"
+    | "mixes-updated"; // Include existing event for consistency
+
+/**
+ * Event payload interface - can be extended for event-specific data
+ */
+export interface QueryEventDetail {
+    [key: string]: unknown;
+}
+
+/**
+ * Dispatch a typed query event
+ * 
+ * @param eventType - The type of event to dispatch
+ * @param detail - Optional event payload data
+ * 
+ * @example
+ * dispatchQueryEvent("audiobook-progress-updated", { audiobookId: "123" });
+ */
+export function dispatchQueryEvent(
+    eventType: QueryEventType,
+    detail?: QueryEventDetail
+): void {
+    window.dispatchEvent(
+        new CustomEvent(eventType, { detail: detail || {} })
+    );
+}
+
+/**
+ * Subscribe to a typed query event
+ * 
+ * @param eventType - The type of event to listen for
+ * @param handler - Callback function to execute when event fires
+ * @returns Cleanup function to remove the event listener
+ * 
+ * @example
+ * const unsubscribe = subscribeQueryEvent("audiobook-progress-updated", () => {
+ *     queryClient.refetchQueries({ queryKey: ["audiobook", id] });
+ * });
+ * // Later: unsubscribe();
+ */
+export function subscribeQueryEvent(
+    eventType: QueryEventType,
+    handler: (event: CustomEvent<QueryEventDetail>) => void
+): () => void {
+    const listener = handler as EventListener;
+    window.addEventListener(eventType, listener);
+    
+    return () => {
+        window.removeEventListener(eventType, listener);
+    };
+}