feat(smart-app): implement complete mobile app MVP

- App.tsx: full navigation (Auth stack + Main tabs with 5 screens)
- Auth: LoginScreen, RegisterScreen, ForgotPasswordScreen
- HomeScreen: dashboard with IoT metrics, weather widget, alerts, quick actions, sensors
- MapScreen: interactive map with layer toggles (6 layers)
- MarketplaceScreen: categories (6), products (5), search
- ChatScreen: AI chat with quick prompts (4), bot responses
- ProfileScreen: user info, stats, menu (9 items), logout
- AlertsScreen: alert list with severity, acknowledge
- SensorsScreen: sensor list with type filters (6 types), search
- ZonesScreen: zone cards with stats
- SettingsScreen: language picker (FR/EN/ES/DE), privacy, about
- Stores: iotStore (sensors, zones, alerts), notificationStore, uiStore + i18n
- Hooks: useSensors, useAlerts, useNotifications, useLocation
- Components: Card, Button, LoadingSpinner, ErrorBoundary, Header
- Services: iotService, notificationService (with axios API client)
- Utils: formatters (temp, AQI, noise, dates), validators (email, password, IBAN)
- Theme: colors.ts with full design system (Blue Ocean palette)
- Ditto: fixed MongoDB connection, new JWT secrets, official gateway image

smart-app-city/frontend/node_modules/graphql/utilities/assertValidName.js.flow

@@ -0,0 +1,34 @@
+// @flow strict
+import devAssert from '../jsutils/devAssert';
+
+import { GraphQLError } from '../error/GraphQLError';
+
+const NAME_RX = /^[_a-zA-Z][_a-zA-Z0-9]*$/;
+
+/**
+ * Upholds the spec rules about naming.
+ */
+export function assertValidName(name: string): string {
+  const error = isValidNameError(name);
+  if (error) {
+    throw error;
+  }
+  return name;
+}
+
+/**
+ * Returns an Error if a name is invalid.
+ */
+export function isValidNameError(name: string): GraphQLError | void {
+  devAssert(typeof name === 'string', 'Expected name to be a string.');
+  if (name.length > 1 && name[0] === '_' && name[1] === '_') {
+    return new GraphQLError(
+      `Name "${name}" must not begin with "__", which is reserved by GraphQL introspection.`,
+    );
+  }
+  if (!NAME_RX.test(name)) {
+    return new GraphQLError(
+      `Names must match /^[_a-zA-Z][_a-zA-Z0-9]*$/ but "${name}" does not.`,
+    );
+  }
+}