feat: update media filter to support multiple series names and enhance library item fetching

k-tv-frontend/lib/types.ts

@@ -12,8 +12,8 @@ export interface MediaFilter {
   min_duration_secs?: number | null;
   max_duration_secs?: number | null;
   collections: string[];
-  /** Filter by TV series name, e.g. "iCarly". Use with Sequential strategy. */
-  series_name?: string | null;
+  /** Filter to one or more TV series by name. OR-combined: any listed show is eligible. */
+  series_names?: string[];
   /** Free-text search, used for library browsing only. */
   search_term?: string | null;
 }