feat: Replace Lucide React with Material-UI for Google OAuth style

- Installed Material-UI (@mui/material, @emotion/react, @emotion/styled, @mui/icons-material)
- Removed unused Lucide React dependency
- Redesigned LoginPage with Material-UI to match Google OAuth login style
- Redesigned AuthorizePage with Material-UI to match Google OAuth permission screen
- Updated docker-compose to remove APISIX health check dependency from frontend

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

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

docker-compose.yml

@@ -128,8 +128,6 @@ services:
     depends_on:
       backend:
         condition: service_started
-      apisix:
-        condition: service_healthy
     volumes:
       - ./oauth/frontend:/app
       - /app/node_modules