Add accounts expansion, analytics, exchange rates, API tokens, PWA support, and UI overhaul

- Expand Account model with account_type (pension, savings, liability, crypto), new banks/currencies (BTC, XMR, FCL, ROP, VOL, MEMP, MPAT, MORTGAGE), and next_payment field
- Add exchange rate endpoint (BCCR integration), analytics endpoint, paste-import for transactions, and API token management
- Add PWA manifest, service worker, and app icons
- Redesign dashboard, transactions, transfers, and login pages with theme support
- Add billing cycle selector, confirm dialog, and paste import modal components
- One-time DB reset in deploy workflow for schema migration

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/App.tsx

@@ -1,10 +1,12 @@
 import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
 import { AuthProvider, useAuth } from './AuthContext';
+import { ThemeProvider } from './ThemeContext';
 import Layout from './components/Layout';
 import Login from './pages/Login';
 import Dashboard from './pages/Dashboard';
 import Transactions from './pages/Transactions';
 import Transfers from './pages/Transfers';
+import Analytics from './pages/Analytics';
 
 function ProtectedRoute({ children }: { children: React.ReactNode }) {
   const { isAuthenticated } = useAuth();
@@ -29,6 +31,7 @@ function AppRoutes() {
       >
         <Route path="/" element={<Dashboard />} />
         <Route path="/transactions" element={<Transactions />} />
+        <Route path="/analytics" element={<Analytics />} />
         <Route path="/transfers" element={<Transfers />} />
       </Route>
     </Routes>
@@ -38,9 +41,11 @@ function AppRoutes() {
 export default function App() {
   return (
     <BrowserRouter>
-      <AuthProvider>
-        <AppRoutes />
-      </AuthProvider>
+      <ThemeProvider>
+        <AuthProvider>
+          <AppRoutes />
+        </AuthProvider>
+      </ThemeProvider>
     </BrowserRouter>
   );
 }