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/postcss/lib/warning.d.ts

@@ -0,0 +1,147 @@
+import { RangePosition } from './css-syntax-error.js'
+import Node from './node.js'
+
+declare namespace Warning {
+  export interface WarningOptions {
+    /**
+     * End position, exclusive, in CSS node string that caused the warning.
+     */
+    end?: RangePosition
+
+    /**
+     * End index, exclusive, in CSS node string that caused the warning.
+     */
+    endIndex?: number
+
+    /**
+     * Start index, inclusive, in CSS node string that caused the warning.
+     */
+    index?: number
+
+    /**
+     * CSS node that caused the warning.
+     */
+    node?: Node
+
+    /**
+     * Name of the plugin that created this warning. `Result#warn` fills
+     * this property automatically.
+     */
+    plugin?: string
+
+    /**
+     * Start position, inclusive, in CSS node string that caused the warning.
+     */
+    start?: RangePosition
+
+    /**
+     * Word in CSS source that caused the warning.
+     */
+    word?: string
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
+  export { Warning_ as default }
+}
+
+/**
+ * Represents a plugin’s warning. It can be created using `Node#warn`.
+ *
+ * ```js
+ * if (decl.important) {
+ *   decl.warn(result, 'Avoid !important', { word: '!important' })
+ * }
+ * ```
+ */
+declare class Warning_ {
+  /**
+   * Column for inclusive start position in the input file with this warning’s source.
+   *
+   * ```js
+   * warning.column //=> 6
+   * ```
+   */
+  column: number
+
+  /**
+   * Column for exclusive end position in the input file with this warning’s source.
+   *
+   * ```js
+   * warning.endColumn //=> 4
+   * ```
+   */
+  endColumn?: number
+
+  /**
+   * Line for exclusive end position in the input file with this warning’s source.
+   *
+   * ```js
+   * warning.endLine //=> 6
+   * ```
+   */
+  endLine?: number
+
+  /**
+   * Line for inclusive start position in the input file with this warning’s source.
+   *
+   * ```js
+   * warning.line //=> 5
+   * ```
+   */
+  line: number
+
+  /**
+   * Contains the CSS node that caused the warning.
+   *
+   * ```js
+   * warning.node.toString() //=> 'color: white !important'
+   * ```
+   */
+  node: Node
+
+  /**
+   * The name of the plugin that created this warning.
+   * When you call `Node#warn` it will fill this property automatically.
+   *
+   * ```js
+   * warning.plugin //=> 'postcss-important'
+   * ```
+   */
+  plugin: string
+
+  /**
+   * The warning message.
+   *
+   * ```js
+   * warning.text //=> 'Try to avoid !important'
+   * ```
+   */
+  text: string
+
+  /**
+   * Type to filter warnings from `Result#messages`.
+   * Always equal to `"warning"`.
+   */
+  type: 'warning'
+
+  /**
+   * @param text Warning message.
+   * @param opts Warning options.
+   */
+  constructor(text: string, opts?: Warning.WarningOptions)
+
+  /**
+   * Returns a warning position and message.
+   *
+   * ```js
+   * warning.toString() //=> 'postcss-lint:a.css:10:14: Avoid !important'
+   * ```
+   *
+   * @return Warning position and message.
+   */
+  toString(): string
+}
+
+declare class Warning extends Warning_ {}
+
+export = Warning