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/react-native/Libraries/LogBox/Data/LogBoxSymbolication.js

@@ -0,0 +1,65 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict
+ * @format
+ */
+
+import type {SymbolicatedStackTrace} from '../../Core/Devtools/symbolicateStackTrace';
+import type {StackFrame} from '../../Core/NativeExceptionsManager';
+
+import symbolicateStackTrace from '../../Core/Devtools/symbolicateStackTrace';
+
+export type Stack = Array<StackFrame>;
+
+const cache: Map<Stack, Promise<SymbolicatedStackTrace>> = new Map();
+
+/**
+ * Sanitize because sometimes, `symbolicateStackTrace` gives us invalid values.
+ */
+const sanitize = ({
+  stack: maybeStack,
+  codeFrame,
+}: SymbolicatedStackTrace): SymbolicatedStackTrace => {
+  if (!Array.isArray(maybeStack)) {
+    throw new Error('Expected stack to be an array.');
+  }
+  const stack: Array<StackFrame> = [];
+  for (const maybeFrame of maybeStack) {
+    let collapse = false;
+    if ('collapse' in maybeFrame) {
+      if (typeof maybeFrame.collapse !== 'boolean') {
+        throw new Error('Expected stack frame `collapse` to be a boolean.');
+      }
+      collapse = maybeFrame.collapse;
+    }
+    stack.push({
+      column: maybeFrame.column,
+      file: maybeFrame.file,
+      lineNumber: maybeFrame.lineNumber,
+      methodName: maybeFrame.methodName,
+      collapse,
+    });
+  }
+  return {stack, codeFrame};
+};
+
+export function deleteStack(stack: Stack): void {
+  cache.delete(stack);
+}
+
+export function symbolicate(
+  stack: Stack,
+  extraData?: mixed,
+): Promise<SymbolicatedStackTrace> {
+  let promise = cache.get(stack);
+  if (promise == null) {
+    promise = symbolicateStackTrace(stack, extraData).then(sanitize);
+    cache.set(stack, promise);
+  }
+
+  return promise;
+}