v0.1.8: tap a session for full detail + receipt

- Sessions list items are now tappable -> SessionDetailScreen.
- Past sessions fetch the full receipt (GET /api/ParkingReceipt): vehicle,
  start/end, time purchased, parking/fee/total, payment (MASTERCARD ••1234),
  auth code, meter, city, transaction id. Adds an "Email me this receipt" action.
- Active sessions show zone/space/start/ends/time-remaining.
- Confirm PastSession + ParkingReceipt types from a live DL-zone session (were
  UNCONFIRMED); fix past-session card to show Zone/Description, not blank.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/src/navigation/RootNavigator.tsx

@@ -21,14 +21,16 @@ import { VehiclesScreen } from '@/screens/VehiclesScreen';
 import { PaymentMethodsScreen } from '@/screens/PaymentMethodsScreen';
 import { NotificationsScreen } from '@/screens/NotificationsScreen';
 import { StartSessionScreen } from '@/screens/StartSessionScreen';
+import { SessionDetailScreen } from '@/screens/SessionDetailScreen';
 import { DiagnosticsScreen } from '@/screens/DiagnosticsScreen';
 import { useTheme } from '@/theme/ThemeContext';
-import type { Zone } from 'parksmarter-client';
+import type { ActiveSession, PastSession, Zone } from 'parksmarter-client';
 
 export type RootStackParamList = {
   Tabs: undefined;
   MeterDetail: { zone: Zone };
   StartSession: { zone: Zone };
+  SessionDetail: { session: PastSession | ActiveSession; kind: 'active' | 'past' };
   About: undefined;
   Profile: undefined;
   Vehicles: undefined;
@@ -120,6 +122,11 @@ export function RootNavigator() {
             component={StartSessionScreen}
             options={{ title: 'Start session' }}
           />
+          <Stack.Screen
+            name="SessionDetail"
+            component={SessionDetailScreen}
+            options={{ title: 'Session' }}
+          />
           <Stack.Screen name="About" component={AboutScreen} options={{ title: 'About' }} />
           <Stack.Screen name="Profile" component={ProfileScreen} options={{ title: 'Profile' }} />
           <Stack.Screen name="Vehicles" component={VehiclesScreen} options={{ title: 'Vehicles' }} />