Use /app/uploads directly for test library folder

- API validates folder exists before adding to library
- /app/uploads is mounted volume in container
- Avoids need to create subdirectories
- Simplifies test setup

cmd/server/tests/test_helpers.go

@@ -297,8 +297,9 @@ 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)
+	// Use /app/uploads which is already mounted in the test container
 	folderReq := map[string]interface{}{
-		"folder_path": "/app/uploads/test-library",
+		"folder_path": "/app/uploads",
 	}
 	folderBody, _ := json.Marshal(folderReq)