fix(ui): resolve tw-animate-css import resolution error

Change CSS import from bare module specifier to url() syntax to fix
Vite/Tailwind CSS resolution issues on some systems.

- Changed `@import "tw-animate-css"` to `@import url("tw-animate-css")`
- The url() wrapper ensures proper package resolution across platforms
- Fixes "Can't resolve 'tw-animate-css'" build error

The bare import syntax failed because Vite's CSS processing didn't
properly resolve the package exports. Using url() bypasses this issue
while still correctly resolving the npm package from node_modules.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ui/src/styles/globals.css

@@ -1,5 +1,5 @@
 @import "tailwindcss";
-@import "tw-animate-css";
+@import url("tw-animate-css");
 
 /* Enable class-based dark mode in Tailwind v4 */
 @custom-variant dark (&:where(.dark, .dark *));