feat: implement multi-provider support in media library

- Introduced IProviderRegistry to manage multiple media providers.
- Updated AppState to use provider_registry instead of a single media_provider.
- Refactored library routes to support provider-specific queries for collections, series, genres, and items.
- Enhanced ProgrammingBlock to include provider_id for algorithmic and manual content types.
- Modified frontend components to allow selection of providers and updated API calls to include provider parameters.
- Adjusted hooks and types to accommodate provider-specific functionality.

k-tv-frontend/lib/types.ts

@@ -57,8 +57,8 @@ export interface RecyclePolicy {
 }
 
 export type BlockContent =
-  | { type: "algorithmic"; filter: MediaFilter; strategy: FillStrategy }
-  | { type: "manual"; items: string[] };
+  | { type: "algorithmic"; filter: MediaFilter; strategy: FillStrategy; provider_id?: string }
+  | { type: "manual"; items: string[]; provider_id?: string };
 
 export interface ProgrammingBlock {
   id: string;
@@ -95,8 +95,16 @@ export interface ProviderCapabilities {
   rescan: boolean;
 }
 
+export interface ProviderInfo {
+  id: string;
+  capabilities: ProviderCapabilities;
+}
+
 export interface ConfigResponse {
   allow_registration: boolean;
+  /** All registered providers. Added in multi-provider update. */
+  providers: ProviderInfo[];
+  /** Primary provider capabilities — kept for backward compat. */
   provider_capabilities: ProviderCapabilities;
 }