feat: implement forgot password and reset password frontend

- Add ForgotPassword page with email submission form
- Add ResetPassword page with token validation and new password form
- Extend AuthContext with requestPasswordReset and resetPassword functions
- Add routes for /forgot-password and /reset-password in App.tsx
- Update Login page to link to forgot password flow instead of showing alert

Implements Fase 1 of frontend missing features analysis

frontend/src/App.tsx

@@ -20,6 +20,8 @@ const Compare = lazy(() => import('./pages/Compare').then(m => ({ default: m.Com
 const Reports = lazy(() => import('./pages/Reports').then(m => ({ default: m.Reports })));
 const Login = lazy(() => import('./pages/Login').then(m => ({ default: m.Login })));
 const Register = lazy(() => import('./pages/Register').then(m => ({ default: m.Register })));
+const ForgotPassword = lazy(() => import('./pages/ForgotPassword').then(m => ({ default: m.ForgotPassword })));
+const ResetPassword = lazy(() => import('./pages/ResetPassword').then(m => ({ default: m.ResetPassword })));
 const ApiKeys = lazy(() => import('./pages/ApiKeys').then(m => ({ default: m.ApiKeys })));
 const AnalyticsDashboard = lazy(() => import('./pages/AnalyticsDashboard').then(m => ({ default: m.AnalyticsDashboard })));
 const NotFound = lazy(() => import('./pages/NotFound').then(m => ({ default: m.NotFound })));
@@ -70,6 +72,8 @@ function App() {
               {/* Public routes */}
               <Route path="/login" element={<Login />} />
               <Route path="/register" element={<Register />} />
+              <Route path="/forgot-password" element={<ForgotPassword />} />
+              <Route path="/reset-password" element={<ResetPassword />} />
               
               {/* Protected routes with layout */}
               <Route path="/" element={<ProtectedLayout />}>