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/ReactCommon/callinvoker/.clang-tidy

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+---
+Checks: '>
+clang-diagnostic-*,
+'
+InheritParentConfig: true
+...

smart-app-city/frontend/node_modules/react-native/ReactCommon/callinvoker/CMakeLists.txt

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+# 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.
+
+cmake_minimum_required(VERSION 3.13)
+set(CMAKE_VERBOSE_MAKEFILE on)
+
+add_compile_options(
+        -fexceptions
+        -frtti
+        -std=c++20
+        -Wall
+        -Wpedantic)
+
+add_library(callinvoker INTERFACE)
+
+target_include_directories(callinvoker INTERFACE .)

smart-app-city/frontend/node_modules/react-native/ReactCommon/callinvoker/React-callinvoker.podspec

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+# 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.
+
+require "json"
+
+package = JSON.parse(File.read(File.join(__dir__, "..", "..", "package.json")))
+version = package['version']
+
+source = { :git => 'https://github.com/facebook/react-native.git' }
+if version == '1000.0.0'
+  # This is an unpublished version, use the latest commit hash of the react-native repo, which we’re presumably in.
+  source[:commit] = `git rev-parse HEAD`.strip if system("git rev-parse --git-dir > /dev/null 2>&1")
+else
+  source[:tag] = "v#{version}"
+end
+
+folly_config = get_folly_config()
+folly_compiler_flags = folly_config[:compiler_flags]
+folly_version = folly_config[:version]
+
+boost_compiler_flags = '-Wno-documentation'
+
+Pod::Spec.new do |s|
+  s.name                   = "React-callinvoker"
+  s.version                = version
+  s.summary                = "-"  # TODO
+  s.homepage               = "https://reactnative.dev/"
+  s.license                = package["license"]
+  s.author                 = "Meta Platforms, Inc. and its affiliates"
+  s.platforms              = min_supported_versions
+  s.source                 = source
+  s.source_files           = "**/*.{cpp,h}"
+  s.header_dir             = "ReactCommon"
+end

smart-app-city/frontend/node_modules/react-native/ReactCommon/callinvoker/ReactCommon/CallInvoker.h

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+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <functional>
+#include <memory>
+
+#include "SchedulerPriority.h"
+
+namespace facebook::react {
+
+using CallFunc = std::function<void()>;
+
+/**
+ * An interface for a generic native-to-JS call invoker. See BridgeJSCallInvoker
+ * for an implementation.
+ */
+class CallInvoker {
+ public:
+  virtual void invokeAsync(CallFunc&& func) noexcept = 0;
+  virtual void invokeAsync(
+      SchedulerPriority /*priority*/,
+      CallFunc&& func) noexcept {
+    // When call with priority is not implemented, fall back to a regular async
+    // execution
+    invokeAsync(std::move(func));
+  }
+  virtual void invokeSync(CallFunc&& func) = 0;
+  virtual ~CallInvoker() {}
+};
+
+class NativeMethodCallInvoker {
+ public:
+  virtual void invokeAsync(
+      const std::string& methodName,
+      CallFunc&& func) noexcept = 0;
+  virtual void invokeSync(const std::string& methodName, CallFunc&& func) = 0;
+  virtual ~NativeMethodCallInvoker() {}
+};
+
+} // namespace facebook::react

smart-app-city/frontend/node_modules/react-native/ReactCommon/callinvoker/ReactCommon/SchedulerPriority.h

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+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <chrono>
+
+namespace facebook::react {
+
+enum class SchedulerPriority : int {
+  ImmediatePriority = 1,
+  UserBlockingPriority = 2,
+  NormalPriority = 3,
+  LowPriority = 4,
+  IdlePriority = 5,
+};
+
+} // namespace facebook::react