fix(pages): use startTransition to eliminate black screen flash during page navigation

[wu21-web]

Description

startTransition keeps old page visible; Suspense fallback navigation only triggers on initial load
and also added a progess bar
and avaliable for deskotp + mobile devices

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactoring (no functional changes)
• Documentation update
• CI / Build / Tooling

How Has This Been Tested?

• make test passes locally
• Manual testing (describe below)
  npm run lint
npm test gives errors that are not specific to my edits.

Checklist

• My code follows the project's coding style (go fmt, go vet)
• I have performed a self-review of my code
• I have added tests that prove my fix is effective or my feature works
• New and existing unit tests pass locally with my changes
• I have updated the documentation accordingly (if applicable)
• I have signed the CLA

Related Issues

closes #788

[github-actions]

🔍 OpenCodeReview found 4 issue(s) in this PR.

• ✅ Successfully posted inline: 4 comment(s)

[lizhengfeng101]

Hi @wu21-web, thank you for taking the time to work on this! Your approach with startTransition + displayLocation is correct, and the progress bar is a nice UX touch.

However, we've decided to go with #792 for this fix, as it takes a similar core approach but also includes:

• The logic extracted into a reusable hook (useTransitionedLocation)
• A fix for ScrollToTop syncing with the display location
• Test coverage for the key scenarios

We'll be closing this PR in favor of #792. That said, if after merging #792 we find that transitions still feel long enough to need visual feedback, we may revisit the progress bar idea — feel free to open a follow-up PR for that if you're interested.

Thanks again for contributing!

[wu21-web]

Thank you, agreed. AI has a better talent in dealing with css and typescripts. 👍