## Summary
- Wraps the app name button in the title bar with a `Tooltip` component
to show the full app name on hover
- Improves usability when the app name is truncated due to the
`max-w-38` constraint
- Uses the `render` prop pattern consistent with the project's
`@base-ui/react` tooltip usage

## Test plan
- [ ] Verify the app name button in the title bar shows a tooltip on
hover displaying the full app name
- [ ] Verify the tooltip shows "No app selected" when no app is selected
- [ ] Verify the button click behavior (navigating to app details) still
works correctly
- [ ] Verify the tooltip styling matches other tooltips in the app

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Co-authored-by: Will Chen <willchen90@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>