proposal-system/web/src/App.tsx

import { Routes, Route, Navigate } from 'react-router-dom';
import { useSelector } from 'react-redux';
import { Box, Toolbar, Typography } from '@mui/material';
import { selectSidebarOpen } from './app/slices/uiSlice';
import type { RootState } from './app/store';
import ProtectedRoute, { RoleGuard } from './components/ProtectedRoute';
import Topbar from './components/Topbar';
import Sidebar from './components/Sidebar';
import LoginPage from './pages/auth/LoginPage';
import AuthCallback from './pages/auth/AuthCallback';
import Dashboard from './pages/dashboard/Dashboard';
import ProposalFormPage from './pages/proposals/form/ProposalFormPage';
import ProposalDetailPage from './pages/proposals/detail/ProposalDetailPage';
import ProposalListPage from './pages/proposals/list/ProposalListPage';
import AdminDashboard from './pages/admin/dashboard/AdminDashboard';
import AdminWorkspace from './pages/admin/workspace/AdminWorkspace';

const DRAWER_WIDTH = 220;

export default function App() {
  const sidebarOpen = useSelector((state: RootState) => selectSidebarOpen(state));

  return (
    <Routes>
      <Route path="/login" element={<LoginPage />} />
      <Route path="/callback" element={<AuthCallback />} />

      <Route
        path="/*"
        element={
          <ProtectedRoute>
            <Box sx={{ display: 'flex' }}>
              <Topbar />
              <Sidebar />
              <Box
                component="main"
                sx={{
                  flexGrow: 1,
                  p: '10px',
                  ml: sidebarOpen ? `${DRAWER_WIDTH}px` : 0,
                  transition: 'margin-left 250ms ease',
                  minHeight: '100vh',
                }}
              >
                <Toolbar sx={{ minHeight: 64 }} />
                <Routes>
                  <Route path="/" element={<Dashboard />} />
                  <Route path="/proposals" element={<ProposalListPage />} />
                  <Route path="/proposals/new" element={<ProposalFormPage />} />
                  <Route path="/proposals/:id" element={<ProposalDetailPage />} />

                  {/* Admin Routes */}
                  <Route path="/admin" element={<RoleGuard roles={['Admin', 'SysAdmin']}><AdminDashboard /></RoleGuard>} />
                  <Route path="/admin/proposals" element={<RoleGuard roles={['Admin', 'SysAdmin']}><AdminDashboard /></RoleGuard>} />
                  <Route path="/admin/proposals/:id" element={<RoleGuard roles={['Admin', 'SysAdmin']}><AdminWorkspace /></RoleGuard>} />
                  <Route path="/admin/users" element={<RoleGuard roles={['SysAdmin']}><Typography variant="h5" sx={{ p: 2 }}>User Management — Coming Soon</Typography></RoleGuard>} />

                  <Route path="*" element={<Navigate to="/" replace />} />
                </Routes>
              </Box>
            </Box>
          </ProtectedRoute>
        }
      />
    </Routes>
  );
}