Expose exact music filters in desktop and local agent clients

apps/desktop/src/search-state.ts

@@ -11,6 +11,16 @@ export function scopedFilters(
   return Object.freeze({ ...filters, code_only: scope === "code" });
 }
 
+/** Exact music metadata can be searched without embedding an empty query. */
+export function hasSearchInput(query: string, filters: SearchFilters): boolean {
+  return Boolean(
+    query.trim() ||
+      (typeof filters.media_artist === "string" &&
+        filters.media_artist.trim()) ||
+      (typeof filters.media_title === "string" && filters.media_title.trim()),
+  );
+}
+
 /** Let rapid typing settle before starting the model lane. */
 export const SEMANTIC_SETTLE_MS = 120;