V3 Code v0.0.25 GitHub OAuth/settings search update

Summary

• Fixes Settings > Git GitHub sign-in to use the OAuth redirect / desktop loopback flow.
• Adds highlighted settings search in the sidebar.
• Updates Codex-like appearance preview and Ctrl+Enter composer setting copy.
• Includes the Windows x64 installer built from codex/ui-import-github-fallback-fixes commit 1e12e979.

Assets

• V3-Code-0.0.25-v3.20260507.settings-github-oauth-search-x64.exe
• V3-Code-0.0.25-v3.20260507.settings-github-oauth-search-x64.exe.blockmap
• latest.yml

Validation

• bun fmt
• bun lint
• bun typecheck
• Windows x64 NSIS artifact build