1. update version to 5.2.1 in changelog and package.json
2. add real-time upload progress display in submission window
3. optimize icon filename display and form reset logic
4. add success modal after successful submission
5. improve logging formatting in submitter backend
1. update debian changelog version from 5.2.0~alpha1 to 5.2.0
2. remove deprecated CI workflow backup files
3. fix duplicate loading issue by adding loadingTabs state
4. add effectiveLoading computed state to handle per-tab loading status
shenmo7192
elysia-best
gfdgd-xi