Fix warnings and update tracability

src/lib/api/backend-integration.test.ts

@@ -350,7 +350,7 @@ describe("Backend Integration - Refactored Business Logic", () => {
       const backendUrl = "https://server.com/Videos/item123/stream.mp4?maxWidth=1280&api_key=token";
       (invoke as any).mockResolvedValueOnce(backendUrl);
 
-      const url = await client.getVideoDownloadUrl("item123", "720p");
+      const url = await client.getVideoDownloadUrl("item123", "medium");
 
       expect(url).toBe(backendUrl);
       expect(invoke).toHaveBeenCalledWith(
@@ -454,8 +454,8 @@ describe("Backend Integration - Refactored Business Logic", () => {
     it("should support complete flow: load → sort → display", async () => {
       (invoke as any).mockResolvedValueOnce({
         items: [
-          { id: "id1", name: "Album A", sortName: "A" },
-          { id: "id2", name: "Album B", sortName: "B" },
+          { id: "id1", name: "Album A" },
+          { id: "id2", name: "Album B" },
         ],
         totalRecordCount: 2,
       });
@@ -467,8 +467,8 @@ describe("Backend Integration - Refactored Business Logic", () => {
       });
 
       // Backend returned pre-sorted items
-      expect(result.items[0].sortName).toBe("A");
-      expect(result.items[1].sortName).toBe("B");
+      expect(result.items[0].name).toBe("Album A");
+      expect(result.items[1].name).toBe("Album B");
 
       // Frontend just displays them
       // No compareFn, no local sorting