feat(shared-auth-ui): redesign login page with animations and theme support

- Migrate icons from custom implementation to @manacore/shared-icons (phosphor-svelte)
- Add CSS media queries for dark/light mode (no more flash on reload)
- Add subtle entrance animations (logo fadeInScale, form fadeInUp, slider fadeIn)
- Redesign custom checkbox with CSS-only styling
- Remove isDark prop dependency, use prefers-color-scheme instead
- Update auth layout to allow full-page rendering

Also updates AppSlider component:
- Add staggered entrance animations for app cards
- Redesign modal with glassmorphism style
- Add theme-aware styling via CSS media queries
- Improve status badge design in modal
- Add close button in top-right corner

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

packages/shared-auth-ui/package.json

@@ -18,7 +18,8 @@
 	],
 	"peerDependencies": {
 		"svelte": "^5.0.0",
-		"@manacore/shared-auth": "workspace:*"
+		"@manacore/shared-auth": "workspace:*",
+		"@manacore/shared-icons": "workspace:*"
 	},
 	"devDependencies": {
 		"svelte": "^5.16.0",