Fix test helper to add library folders before media items

- Update createTestMediaItemID to add folder after creating library
- Ensures proper test data setup
- Tests now reflect real-world usage pattern
- Also fixed existing syntax error in mime_type line

Fixes: TestCollectionsBulkOperations and related test failures
Related: Handler validation commit

cmd/server/tests/test_helpers.go

@@ -145,9 +145,10 @@ func setupTestServer(t *testing.T) (*httptest.Server, *database.Queries, *config
 	queueHandler := handlers.NewQueueHandler(queries, queueProcessor)
 
 	// Create refactored handlers (matching main.go Phase 6)
+	libraryService := services.NewLibraryService(queries)
 	worker := services.NewWorker(3)
 	collectionHandler := handlers.NewCollectionHandler(queries, connManager)
-	mediaHandler := handlers.NewMediaHandler(queries, worker)
+	mediaHandler := handlers.NewMediaHandler(queries, libraryService, worker)
 	searchHandler := handlers.NewSearchHandler(queries)
 	matchingHandler := handlers.NewMatchingHandler(queries, connManager)
 
@@ -295,6 +296,21 @@ func createTestMediaItemID(t *testing.T, ts *httptest.Server, token string) stri
 
 	libData := libResult["id"].(string)
 
+	// Add a folder to the library (required before adding media items)
+	folderReq := map[string]interface{}{
+		"folder_path": "/tmp/test-library",
+	}
+	folderBody, _ := json.Marshal(folderReq)
+
+	folderReqHTTP, _ := http.NewRequest("POST", ts.URL+"/api/libraries/"+libData+"/folders", bytes.NewBuffer(folderBody))
+	folderReqHTTP.Header.Set("Content-Type", "application/json")
+	folderReqHTTP.Header.Set("Authorization", "Bearer "+token)
+
+	folderResp, err := client.Do(folderReqHTTP)
+	require.NoError(t, err)
+	defer folderResp.Body.Close()
+	require.Equal(t, http.StatusCreated, folderResp.StatusCode, "Library folder creation is required before adding media items")
+
 	// Create a test media item
 	mediaItemReq := map[string]interface{}{
 		"library_id": libData,