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/at-rule.d.ts

@@ -0,0 +1,140 @@
+import Container, {
+  ContainerProps,
+  ContainerWithChildren
+} from './container.js'
+
+declare namespace AtRule {
+  export interface AtRuleRaws extends Record<string, unknown> {
+    /**
+     * The space symbols after the last child of the node to the end of the node.
+     */
+    after?: string
+
+    /**
+     * The space between the at-rule name and its parameters.
+     */
+    afterName?: string
+
+    /**
+     * The space symbols before the node. It also stores `*`
+     * and `_` symbols before the declaration (IE hack).
+     */
+    before?: string
+
+    /**
+     * The symbols between the last parameter and `{` for rules.
+     */
+    between?: string
+
+    /**
+     * The rule’s selector with comments.
+     */
+    params?: {
+      raw: string
+      value: string
+    }
+
+    /**
+     * Contains `true` if the last child has an (optional) semicolon.
+     */
+    semicolon?: boolean
+  }
+
+  export interface AtRuleProps extends ContainerProps {
+    /** Name of the at-rule. */
+    name: string
+    /** Parameters following the name of the at-rule. */
+    params?: number | string
+    /** Information used to generate byte-to-byte equal node string as it was in the origin input. */
+    raws?: AtRuleRaws
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
+  export { AtRule_ as default }
+}
+
+/**
+ * Represents an at-rule.
+ *
+ * ```js
+ * Once (root, { AtRule }) {
+ *   let media = new AtRule({ name: 'media', params: 'print' })
+ *   media.append(…)
+ *   root.append(media)
+ * }
+ * ```
+ *
+ * If it’s followed in the CSS by a `{}` block, this node will have
+ * a nodes property representing its children.
+ *
+ * ```js
+ * const root = postcss.parse('@charset "UTF-8"; @media print {}')
+ *
+ * const charset = root.first
+ * charset.type  //=> 'atrule'
+ * charset.nodes //=> undefined
+ *
+ * const media = root.last
+ * media.nodes   //=> []
+ * ```
+ */
+declare class AtRule_ extends Container {
+  /**
+   * An array containing the layer’s children.
+   *
+   * ```js
+   * const root = postcss.parse('@layer example { a { color: black } }')
+   * const layer = root.first
+   * layer.nodes.length           //=> 1
+   * layer.nodes[0].selector      //=> 'a'
+   * ```
+   *
+   * Can be `undefinded` if the at-rule has no body.
+   *
+   * ```js
+   * const root = postcss.parse('@layer a, b, c;')
+   * const layer = root.first
+   * layer.nodes //=> undefined
+   * ```
+   */
+  nodes: Container['nodes']
+  parent: ContainerWithChildren | undefined
+
+  raws: AtRule.AtRuleRaws
+  type: 'atrule'
+  constructor(defaults?: AtRule.AtRuleProps)
+  assign(overrides: AtRule.AtRuleProps | object): this
+
+  clone(overrides?: Partial<AtRule.AtRuleProps>): this
+
+  cloneAfter(overrides?: Partial<AtRule.AtRuleProps>): this
+
+  cloneBefore(overrides?: Partial<AtRule.AtRuleProps>): this
+  /**
+   * The at-rule’s name immediately follows the `@`.
+   *
+   * ```js
+   * const root  = postcss.parse('@media print {}')
+   * const media = root.first
+   * media.name //=> 'media'
+   * ```
+   */
+  get name(): string
+  set name(value: string)
+  /**
+   * The at-rule’s parameters, the values that follow the at-rule’s name
+   * but precede any `{}` block.
+   *
+   * ```js
+   * const root  = postcss.parse('@media print, screen {}')
+   * const media = root.first
+   * media.params //=> 'print, screen'
+   * ```
+   */
+  get params(): string
+  set params(value: string)
+}
+
+declare class AtRule extends AtRule_ {}
+
+export = AtRule