fix: stabilize admin e2e and release versioning

[orangeboyChen]

Summary\n- fix admin credential save button locator in E2E coverage\n- add centered Dashboard GitHub repository link with theme-aware styling and package version\n- make release workflow bump package.json, push the bot-authored version commit, and build/release from that commit\n\n## Validation\n- bun run lint\n- bun run format:check\n- bun run typecheck\n- bun run test:coverage\n- bun run build

[chatgpt-codex-connector]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.77%. Comparing base (deee7db) to head (257801d).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #97   +/-   ##
=======================================
  Coverage   94.77%   94.77%           
=======================================
  Files          21       21           
  Lines        4251     4251           
  Branches     1238     1238           
=======================================
  Hits         4029     4029           
  Misses        222      222           

Flag	Coverage Δ
unittests	94.77% <ø> (ø)

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