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/FBLazyVector/FBLazyVector.podspec

@@ -0,0 +1,31 @@
+# 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+  # This is an unpublished version, use the latest commit hash of the react-native repo, which we’re presumably in.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
+
+Pod::Spec.new do |s|
+  s.name                   = "FBLazyVector"
+  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           = "**/*.{c,h,m,mm,cpp}"
+  s.header_dir             = "FBLazyVector"
+
+end

smart-app-city/frontend/node_modules/react-native/Libraries/FBLazyVector/FBLazyVector/FBLazyIterator.h

@@ -0,0 +1,127 @@
+/*
+ * 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
+
+#import <functional>
+#import <iterator>
+
+namespace FB {
+
+template <typename T, typename U>
+class LazyIterator {
+ public:
+  using value_type = T;
+  using pointer = std::unique_ptr<T>;
+  using reference = T;
+  using iterator_category = std::random_access_iterator_tag;
+  using difference_type = std::int32_t;
+  using size_type = std::int32_t;
+  using convert_type = std::function<T(U)>;
+
+ public:
+  LazyIterator() = default;
+
+  LazyIterator(U vector, convert_type convert, size_type i)
+      : _v(vector), _i(i), _convert(std::move(convert)) {}
+
+  bool operator==(const LazyIterator& other) const {
+    return _i == other._i && _v == other._v;
+  }
+
+  bool operator<(const LazyIterator& b) const {
+    return _i < b._i;
+  }
+
+  value_type operator*() const {
+    return _convert(_v[_i]);
+  }
+
+  std::unique_ptr<value_type> operator->() const {
+    return std::make_unique<value_type>(*this);
+  }
+
+  LazyIterator operator+(difference_type n) const {
+    return LazyIterator(_v, _convert, _i + n);
+  }
+
+  LazyIterator& operator+=(difference_type n) {
+    _i += n;
+    return *this;
+  }
+
+  LazyIterator& operator-=(difference_type n) {
+    _i -= n;
+    return *this;
+  }
+
+  LazyIterator operator-(difference_type n) const {
+    return LazyIterator(_v, _i - n);
+  }
+
+  difference_type operator-(const LazyIterator& a) const {
+    return _i - a._i;
+  }
+
+  LazyIterator& operator++() {
+    return *this += 1;
+  }
+
+  LazyIterator operator++(int) {
+    auto tmp = *this;
+    ++*this;
+    return tmp;
+  }
+
+  LazyIterator& operator--() {
+    return *this -= 1;
+  }
+
+  LazyIterator operator--(int) {
+    auto tmp = *this;
+    --*this;
+    return tmp;
+  }
+
+  value_type operator[](difference_type n) const {
+    return _convert(_v[_i + n]);
+  }
+
+ private:
+  U _v;
+  size_type _i;
+  convert_type _convert;
+};
+
+template <typename T, typename U>
+LazyIterator<T, U> operator+(
+    typename LazyIterator<T, U>::difference_type n,
+    const LazyIterator<T, U>& i) {
+  return i + n;
+}
+
+template <typename T, typename U>
+bool operator!=(const LazyIterator<T, U>& a, const LazyIterator<T, U>& b) {
+  return !(a == b);
+}
+
+template <typename T, typename U>
+bool operator<=(const LazyIterator<T, U>& a, const LazyIterator<T, U>& b) {
+  return a < b || a == b;
+}
+
+template <typename T, typename U>
+bool operator>(const LazyIterator<T, U>& a, const LazyIterator<T, U>& b) {
+  return b < a;
+}
+
+template <typename T, typename U>
+bool operator>=(const LazyIterator<T, U>& a, const LazyIterator<T, U>& b) {
+  return a > b || a == b;
+}
+
+} // namespace FB

smart-app-city/frontend/node_modules/react-native/Libraries/FBLazyVector/FBLazyVector/FBLazyVector.h

@@ -0,0 +1,102 @@
+/*
+ * 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
+
+#import <cassert>
+#import <functional>
+#import <iterator>
+
+#import <FBLazyVector/FBLazyIterator.h>
+
+namespace FB {
+
+/**
+ * Presents a type-safe wrapper around an arbitrary object that represents an
+ * _immutable_ array of objects. Each item is constructed lazily on demand and
+ * reconstructed on each access; there is no caching.
+ */
+template <typename T, typename U>
+class LazyVector {
+ public:
+  using value_type = T;
+  using reference = T;
+  using const_reference = T;
+  using const_iterator = LazyIterator<T, U>;
+  using iterator = const_iterator;
+  using size_type = std::int32_t;
+  using convert_type = std::function<T(U)>;
+
+  static LazyVector<T, U>
+  fromUnsafeRawValue(U v, size_type size, convert_type convert) {
+    return {v, size, convert};
+  }
+
+  U unsafeRawValue() const {
+    return _v;
+  }
+
+  bool empty() const {
+    return _size == 0;
+  }
+
+  size_type size() const {
+    return _size;
+  }
+
+  const_reference at(size_type pos) const {
+#ifndef _LIBCPP_NO_EXCEPTIONS
+    if (!(pos < _size))
+      throw std::out_of_range("out of range");
+#else
+    assert(pos < _size || !"out of range");
+#endif
+    return _convert(_v[pos]);
+  }
+
+  const_reference operator[](size_type pos) const {
+    assert(pos < _size);
+    return _convert(_v[pos]);
+  }
+
+  const_reference front() const {
+    assert(_size);
+    return (*this)[0];
+  }
+
+  const_reference back() const {
+    assert(_size);
+    return (*this)[_size - 1];
+  }
+
+  const_iterator begin() const {
+    return const_iterator(_v, _convert, 0);
+  }
+
+  const_iterator cbegin() const {
+    return begin();
+  }
+
+  const_iterator end() const {
+    return const_iterator(_v, _convert, _size);
+  }
+
+  const_iterator cend() const {
+    return end();
+  }
+
+ private:
+  /** Wrapped vector */
+  LazyVector(U vector, size_type size, convert_type convert)
+      : _v(vector), _size(size), _convert(convert) {}
+
+  U _v;
+  size_type _size;
+  convert_type _convert;
+};
+
+} // namespace FB