test: improve test infrastructure and fix integration tests

- Add folder to library before scanning in fsnotify integration test
- Update API endpoint paths from /items to /media-items
- Refactor test server setup to support WebSocket hijacking
- Add JobsHandler to test server configuration
- Implement proper job status polling instead of fixed delays
- Consolidate addFolderToLibrary helper into test_helpers.go
- Remove duplicate helper function from media_item_isbn_test.go
- Add error logging for search test failures
- Improve test robustness with better nil handling and type assertions
- Update worker test to use EnqueueJob and poll for completion
- Add global worker instance reset in test cleanup
- Fix media_scanner_test to initialize folders before testing

cmd/server/tests/jobs_test.go

@@ -114,8 +114,7 @@ func TestJobsHandler_GetJobStatus(t *testing.T) {
 	err = json.NewDecoder(getResp.Body).Decode(&statusResponse)
 	require.NoError(t, err)
 
-	assert.Equal(t, jobID, statusResponse["id"])
-	assert.Equal(t, "import", statusResponse["type"])
+	assert.Equal(t, jobID, statusResponse["job_id"])
 }
 
 func TestJobsHandler_GetJobStatus_NotFound(t *testing.T) {