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/Text/TextInput/Singleline/RCTSinglelineTextInputView.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.
+ */
+
+#import "RCTBaseTextInputView.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RCTSinglelineTextInputView : RCTBaseTextInputView
+
+@end
+
+NS_ASSUME_NONNULL_END

smart-app-city/frontend/node_modules/react-native/Libraries/Text/TextInput/Singleline/RCTSinglelineTextInputView.mm

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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.
+ */
+
+#import <React/RCTSinglelineTextInputView.h>
+
+#import <React/RCTBridge.h>
+
+#import <React/RCTUITextField.h>
+
+@implementation RCTSinglelineTextInputView {
+  RCTUITextField *_backedTextInputView;
+}
+
+- (instancetype)initWithBridge:(RCTBridge *)bridge
+{
+  if (self = [super initWithBridge:bridge]) {
+    // `submitBehavior` defaults to `"blurAndSubmit"` for <TextInput multiline={false}> by design.
+    self.submitBehavior = @"blurAndSubmit";
+
+    _backedTextInputView = [[RCTUITextField alloc] initWithFrame:self.bounds];
+    _backedTextInputView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+    _backedTextInputView.textInputDelegate = self;
+
+    [self addSubview:_backedTextInputView];
+  }
+
+  return self;
+}
+
+- (id<RCTBackedTextInputViewProtocol>)backedTextInputView
+{
+  return _backedTextInputView;
+}
+
+@end

smart-app-city/frontend/node_modules/react-native/Libraries/Text/TextInput/Singleline/RCTSinglelineTextInputViewManager.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.
+ */
+
+#import "RCTBaseTextInputViewManager.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RCTSinglelineTextInputViewManager : RCTBaseTextInputViewManager
+
+@end
+
+NS_ASSUME_NONNULL_END

smart-app-city/frontend/node_modules/react-native/Libraries/Text/TextInput/Singleline/RCTSinglelineTextInputViewManager.mm

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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.
+ */
+
+#import <React/RCTSinglelineTextInputViewManager.h>
+
+#import <React/RCTBaseTextInputShadowView.h>
+#import <React/RCTSinglelineTextInputView.h>
+
+@implementation RCTSinglelineTextInputViewManager
+
+RCT_EXPORT_MODULE()
+
+- (RCTShadowView *)shadowView
+{
+  RCTBaseTextInputShadowView *shadowView = (RCTBaseTextInputShadowView *)[super shadowView];
+
+  shadowView.maximumNumberOfLines = 1;
+
+  return shadowView;
+}
+
+- (UIView *)view
+{
+  return [[RCTSinglelineTextInputView alloc] initWithBridge:self.bridge];
+}
+
+@end

smart-app-city/frontend/node_modules/react-native/Libraries/Text/TextInput/Singleline/RCTUITextField.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.
+ */
+
+#import <UIKit/UIKit.h>
+
+#import <React/RCTBackedTextInputDelegate.h>
+#import <React/RCTBackedTextInputViewProtocol.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/*
+ * Just regular UITextField... but much better!
+ */
+@interface RCTUITextField : UITextField <RCTBackedTextInputViewProtocol>
+
+- (instancetype)initWithCoder:(NSCoder *)decoder NS_UNAVAILABLE;
+
+@property (nonatomic, weak) id<RCTBackedTextInputDelegate> textInputDelegate;
+
+@property (nonatomic, assign) BOOL caretHidden;
+@property (nonatomic, assign) BOOL contextMenuHidden;
+@property (nonatomic, assign, readonly) BOOL textWasPasted;
+@property (nonatomic, assign, readonly) BOOL dictationRecognizing;
+@property (nonatomic, strong, nullable) UIColor *placeholderColor;
+@property (nonatomic, assign) UIEdgeInsets textContainerInset;
+@property (nonatomic, assign, getter=isEditable) BOOL editable;
+@property (nonatomic, getter=isScrollEnabled) BOOL scrollEnabled;
+@property (nonatomic, strong, nullable) NSString *inputAccessoryViewID;
+@property (nonatomic, assign, readonly) CGFloat zoomScale;
+@property (nonatomic, assign, readonly) CGPoint contentOffset;
+@property (nonatomic, assign, readonly) UIEdgeInsets contentInset;
+
+@end
+
+NS_ASSUME_NONNULL_END

smart-app-city/frontend/node_modules/react-native/Libraries/Text/TextInput/Singleline/RCTUITextField.mm

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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.
+ */
+
+#import <React/RCTUITextField.h>
+
+#import <React/RCTBackedTextInputDelegateAdapter.h>
+#import <React/RCTTextAttributes.h>
+#import <React/RCTUtils.h>
+#import <React/UIView+React.h>
+
+@implementation RCTUITextField {
+  RCTBackedTextFieldDelegateAdapter *_textInputDelegateAdapter;
+  NSDictionary<NSAttributedStringKey, id> *_defaultTextAttributes;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+  if (self = [super initWithFrame:frame]) {
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(_textDidChange)
+                                                 name:UITextFieldTextDidChangeNotification
+                                               object:self];
+
+    _textInputDelegateAdapter = [[RCTBackedTextFieldDelegateAdapter alloc] initWithTextField:self];
+    _scrollEnabled = YES;
+  }
+
+  return self;
+}
+
+- (void)_textDidChange
+{
+  _textWasPasted = NO;
+}
+
+#pragma mark - Accessibility
+
+- (void)setIsAccessibilityElement:(BOOL)isAccessibilityElement
+{
+  // UITextField is accessible by default (some nested views are) and disabling that is not supported.
+  // On iOS accessible elements cannot be nested, therefore enabling accessibility for some container view
+  // (even in a case where this view is a part of public API of TextInput on iOS) shadows some features implemented
+  // inside the component.
+}
+
+#pragma mark - Properties
+
+- (void)setTextContainerInset:(UIEdgeInsets)textContainerInset
+{
+  _textContainerInset = textContainerInset;
+  [self setNeedsLayout];
+}
+
+- (void)setPlaceholder:(NSString *)placeholder
+{
+  [super setPlaceholder:placeholder];
+  [self _updatePlaceholder];
+}
+
+- (void)setPlaceholderColor:(UIColor *)placeholderColor
+{
+  _placeholderColor = placeholderColor;
+  [self _updatePlaceholder];
+}
+
+- (void)setDefaultTextAttributes:(NSDictionary<NSAttributedStringKey, id> *)defaultTextAttributes
+{
+  if ([_defaultTextAttributes isEqualToDictionary:defaultTextAttributes]) {
+    return;
+  }
+
+  _defaultTextAttributes = defaultTextAttributes;
+  [super setDefaultTextAttributes:defaultTextAttributes];
+  [self _updatePlaceholder];
+}
+
+- (NSDictionary<NSAttributedStringKey, id> *)defaultTextAttributes
+{
+  return _defaultTextAttributes;
+}
+
+- (void)_updatePlaceholder
+{
+  self.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeholder ?: @""
+                                                               attributes:[self _placeholderTextAttributes]];
+}
+
+- (BOOL)isEditable
+{
+  return self.isEnabled;
+}
+
+- (void)setEditable:(BOOL)editable
+{
+  self.enabled = editable;
+}
+
+- (void)setSecureTextEntry:(BOOL)secureTextEntry
+{
+  if (self.secureTextEntry == secureTextEntry) {
+    return;
+  }
+
+  [super setSecureTextEntry:secureTextEntry];
+
+  // Fix for trailing whitespate issue
+  // Read more:
+  // https://stackoverflow.com/questions/14220187/uitextfield-has-trailing-whitespace-after-securetextentry-toggle/22537788#22537788
+  NSAttributedString *originalText = [self.attributedText copy];
+  self.attributedText = [NSAttributedString new];
+  self.attributedText = originalText;
+}
+
+#pragma mark - Placeholder
+
+- (NSDictionary<NSAttributedStringKey, id> *)_placeholderTextAttributes
+{
+  NSMutableDictionary<NSAttributedStringKey, id> *textAttributes =
+      [_defaultTextAttributes mutableCopy] ?: [NSMutableDictionary new];
+
+  if (self.placeholderColor) {
+    [textAttributes setValue:self.placeholderColor forKey:NSForegroundColorAttributeName];
+  } else {
+    [textAttributes removeObjectForKey:NSForegroundColorAttributeName];
+  }
+
+  return textAttributes;
+}
+
+#pragma mark - Context Menu
+
+- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
+{
+  if (_contextMenuHidden) {
+    return NO;
+  }
+
+  return [super canPerformAction:action withSender:sender];
+}
+
+#pragma mark - Dictation
+
+- (void)dictationRecordingDidEnd
+{
+  _dictationRecognizing = YES;
+}
+
+- (void)removeDictationResultPlaceholder:(id)placeholder willInsertResult:(BOOL)willInsertResult
+{
+  [super removeDictationResultPlaceholder:placeholder willInsertResult:willInsertResult];
+  _dictationRecognizing = NO;
+}
+
+#pragma mark - Caret Manipulation
+
+- (CGRect)caretRectForPosition:(UITextPosition *)position
+{
+  if (_caretHidden) {
+    return CGRectZero;
+  }
+
+  return [super caretRectForPosition:position];
+}
+
+#pragma mark - Positioning Overrides
+
+- (CGRect)textRectForBounds:(CGRect)bounds
+{
+  return UIEdgeInsetsInsetRect([super textRectForBounds:bounds], _textContainerInset);
+}
+
+- (CGRect)editingRectForBounds:(CGRect)bounds
+{
+  return [self textRectForBounds:bounds];
+}
+
+#pragma mark - Overrides
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
+// Overrides selectedTextRange setter to get notify when selectedTextRange changed.
+- (void)setSelectedTextRange:(UITextRange *)selectedTextRange
+{
+  [super setSelectedTextRange:selectedTextRange];
+  [_textInputDelegateAdapter selectedTextRangeWasSet];
+}
+#pragma clang diagnostic pop
+
+- (void)setSelectedTextRange:(UITextRange *)selectedTextRange notifyDelegate:(BOOL)notifyDelegate
+{
+  if (!notifyDelegate) {
+    // We have to notify an adapter that following selection change was initiated programmatically,
+    // so the adapter must not generate a notification for it.
+    [_textInputDelegateAdapter skipNextTextInputDidChangeSelectionEventWithTextRange:selectedTextRange];
+  }
+
+  [super setSelectedTextRange:selectedTextRange];
+}
+
+- (void)paste:(id)sender
+{
+  _textWasPasted = YES;
+  [super paste:sender];
+}
+
+#pragma mark - Layout
+
+- (CGSize)contentSize
+{
+  // Returning size DOES contain `textContainerInset` (aka `padding`).
+  return self.intrinsicContentSize;
+}
+
+- (CGSize)intrinsicContentSize
+{
+  // Note: `placeholder` defines intrinsic size for `<TextInput>`.
+  NSString *text = self.placeholder ?: @"";
+  CGSize size = [text sizeWithAttributes:[self _placeholderTextAttributes]];
+  size = CGSizeMake(RCTCeilPixelValue(size.width), RCTCeilPixelValue(size.height));
+  size.width += _textContainerInset.left + _textContainerInset.right;
+  size.height += _textContainerInset.top + _textContainerInset.bottom;
+  // Returning size DOES contain `textContainerInset` (aka `padding`).
+  return size;
+}
+
+- (CGSize)sizeThatFits:(CGSize)size
+{
+  // All size values here contain `textContainerInset` (aka `padding`).
+  CGSize intrinsicSize = self.intrinsicContentSize;
+  return CGSizeMake(MIN(size.width, intrinsicSize.width), MIN(size.height, intrinsicSize.height));
+}
+
+@end