Add DEPOSITO transaction type and Salarios page

New TransactionType.DEPOSITO for salary deposits from n8n/Gmail flow.
New /salarios endpoint with summary. New top-level Salarios page with
DataTable and summary cards. Push notifications link to /salarios for
deposits.

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

frontend/src/App.tsx

@@ -6,6 +6,7 @@ import Login from './pages/Login';
 import Dashboard from './pages/Dashboard';
 import Budget from './pages/Budget';
 import Analytics from './pages/Analytics';
+import Salarios from './pages/Salarios';
 
 function ProtectedRoute({ children }: { children: React.ReactNode }) {
   const { isAuthenticated } = useAuth();
@@ -31,6 +32,7 @@ function AppRoutes() {
         <Route path="/" element={<Dashboard />} />
         <Route path="/budget" element={<Budget />} />
         <Route path="/analytics" element={<Analytics />} />
+        <Route path="/salarios" element={<Salarios />} />
         {/* Redirect old routes */}
         <Route path="/transactions" element={<Navigate to="/budget" replace />} />
         <Route path="/transfers" element={<Navigate to="/budget" replace />} />