feat: Improve V2Select multi-select dropdown item display

- Enhanced the display of selected items in the V2Select component to show labels in a comma-separated format, improving user visibility without needing to open the dropdown.
- Implemented tooltip functionality that activates only when the text is truncated, allowing users to see all selected items at a glance.
- Updated the DropdownSelect component to ensure consistent behavior across all screens using this component.
- Added necessary imports and state management for tooltip visibility and text truncation detection.

Made-with: Cursor

frontend/package.json

@@ -81,6 +81,7 @@
     "mammoth": "^1.11.0",
     "next": "^15.4.8",
     "qrcode": "^1.5.4",
+    "radix-ui": "^1.4.3",
     "react": "19.1.0",
     "react-day-picker": "^9.11.1",
     "react-dnd": "^16.0.1",