closes #1885 

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Added a tooltip to sidebar app items to show the full project name on
hover. Improves readability for long names without changing
interactions.

- **New Features**
- Wrapped the app row with TooltipProvider/Trigger and show
TooltipContent on the right with the full name.
  - Click and favorite actions remain unchanged.

<sup>Written for commit 274c250a27f244f926dcc30413dc1c3db62ca93a.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->