#270 feat(desktop): fix some tooltips and gap

Summary

• Replace native title attributes with Tooltip components in OpenInButton and HelpMenu
• Adjust TopBar spacing to accommodate tooltip changes
• Provides more polished, consistent tooltip UX across the desktop app

Test plan

• Verify tooltips appear on hover for the "Open in" button
• Verify tooltip appears on hover for the Help menu icon
• Confirm tooltips display correct text including keyboard shortcuts

🤖 Generated with Claude Code

Summary by CodeRabbit

• UI/UX Improvements
  • Added interactive tooltips to the "Open in" button (displaying the current app name and keyboard shortcut) and Help menu trigger for enhanced user guidance on hover.
  • Refined spacing adjustments in the top bar for improved visual layout and better component alignment.

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