🎨 style(contacts): fix CSS variables and add modern contact pages

- Fix CSS variable names to match shared-tailwind themes
  - --primary → --color-primary
  - --background → --color-background
  - --card → --color-surface
  - etc.
- Add new contact page with modern design
  - Live avatar preview with initials
  - Section-based form with icons
  - Input fields with inline icons
- Add contact detail page with view/edit modes
  - Quick actions (call, email, message)
  - Detail cards for contact info, work, address, notes
  - Favorite toggle button
- Update central test user credentials (t@t.de)
- Add port 5184 to CORS origins for contacts web app

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

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

packages/shared-auth-ui/src/pages/LoginPage.svelte

@@ -226,8 +226,8 @@
 	}
 
 	function fillDevCredentials() {
-		email = 'till.schneider@memoro.ai';
-		password = 'Aa-12345678';
+		email = 't@t.de';
+		password = 'testtesttest';
 	}
 </script>