fix(desktop): restore styled tooltips on right sidebar file tree buttons and rows

[wnuuee1]

What does this PR do?

Fixes the Refresh and Collapse All buttons in the right sidebar's file tree header, and each file/folder row in the file tree itself, showing plain browser-native tooltips instead of the app's styled dark tooltip.

This restores work from #51315 ("replace native title tooltips with styled Tip component"), which wrapped these buttons in <Tip>. #49037 rewrote FilesystemTab as part of the Projects feature, and its merge reintroduced the native title= attributes, reverting the tooltip fix from #51315. #49037 also removed the Open Folder button from that same file — its PR description states the freeform folder picker was retired in favor of project/worktree-based workspace switching, so that change is intentional and out of scope here. Only the two remaining buttons need the tooltip restored.

Additionally, ProjectTree (./files/tree.tsx) rendered each file/folder row with a native title={node.data.id} showing the full path, which had the same plain-tooltip regression. This wasn't touched by #51315 originally, so it's addressed here with the same fix.

Related Issue

Fixes #

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 🔒 Security fix
• 📝 Documentation update
• ✅ Tests (adding or improving test coverage)
• ♻️ Refactor (no behavior change)
• 🎯 New skill (bundled or hub)

Changes Made

• apps/desktop/src/app/right-sidebar/index.tsx — replaced native title= with <Tip label={...} side="left"> on the Refresh and Collapse All buttons in FilesystemTab (regressed by feat(desktop): first-class projects — sidebar, coding rail, review pane, and agent project tools #49037; Open Folder was intentionally removed by that PR and is not restored here)
• apps/desktop/src/app/right-sidebar/files/tree.tsx — replaced native title={node.data.id} with <Tip label={node.data.id} side="left"> on each file tree row in ProjectTreeRow

How to Test

1. Launch the desktop app with a workspace/project open (so the file tree renders)
2. Open the right sidebar and hover over the Refresh button — verify a styled dark tooltip appears
3. Hover over the Collapse All button — verify a styled dark tooltip appears
4. Hover over any file or folder row in the tree — verify a styled dark tooltip with the full path appears (instead of the native browser tooltip), positioned to the left so it doesn't overflow the sidebar
5. Verify drag-and-drop of a file row still works (e.g. dragging a file into the chat attach zone)
6. Verify the tree still scrolls/renders correctly with the tooltip wrapper (no row height/layout regressions from virtualization)

Checklist

Code

• I've read the Contributing Guide
• My commit messages follow Conventional Commits (fix(scope):, feat(scope):, etc.)
• I searched for existing PRs to make sure this isn't a duplicate
• My PR contains only changes related to this fix/feature (no unrelated commits)
• I've run pytest tests/ -q and all tests pass
• I've added tests for my changes (required for bug fixes, strongly encouraged for features)
• I've tested on my platform: Windows 11

Documentation & Housekeeping

• I've updated relevant documentation (README, docs/, docstrings) — or N/A
• I've updated cli-config.yaml.example if I added/changed config keys — or N/A
• I've updated CONTRIBUTING.md or AGENTS.md if I changed architecture or workflows — or N/A
• I've considered cross-platform impact (Windows, macOS) per the compatibility guide — or N/A
• I've updated tool descriptions/schemas if I changed tool behavior — or N/A

For New Skills

N/A

Screenshots / Logs

[teknium1]

Thanks for identifying the regression. Current main still uses native title attributes on the file-tree Refresh and Collapse All buttons (apps/desktop/src/app/right-sidebar/index.tsx:160,171) and rows (apps/desktop/src/app/right-sidebar/files/tree.tsx:330). The proposed Tip direction fits the component's documented drop-in title replacement (apps/desktop/src/components/ui/tooltip.tsx:74-90).

Problems

• The PR has no tooltip regression test. Current sidebar coverage clicks Refresh but does not hover/assert tooltip content (apps/desktop/src/app/right-sidebar/index.test.tsx:34-47).
• The branch is substantially stale: GitHub reports it is 1,488 commits behind main. Preserve the current ProjectTreeRow markup, including its newer row-hover class at apps/desktop/src/app/right-sidebar/files/tree.tsx:278, when salvaging the narrow wrapper change.

Suggested changes

• Add focused hover assertions for a header action and a populated file row, following the existing tooltip portal test pattern in apps/desktop/src/app/right-sidebar/terminal/rail.test.tsx:22-28.

Automated hermes-sweeper review.