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/@ide/backoff/build/backoff.d.ts

@@ -0,0 +1,6 @@
+export declare function computeNextBackoffInterval(initialBackoff: number, previousRetryCount: number, { multiplier, randomizationFactor, minBackoff, maxBackoff, }?: {
+    multiplier?: number | undefined;
+    randomizationFactor?: number | undefined;
+    minBackoff?: number | undefined;
+    maxBackoff?: number | undefined;
+}): number;

smart-app-city/frontend/node_modules/@ide/backoff/build/backoff.js

@@ -0,0 +1,19 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const assert_1 = __importDefault(require("assert"));
+function computeNextBackoffInterval(initialBackoff, previousRetryCount, { multiplier = 1.5, randomizationFactor = 0.25, minBackoff = initialBackoff, maxBackoff = Infinity, } = {}) {
+    assert_1.default(initialBackoff > 0, `The initial backoff interval must be positive`);
+    assert_1.default(previousRetryCount >= 0, `The previous retry count must not be negative`);
+    assert_1.default(multiplier >= 1, `The backoff multiplier must be greater than or equal to 1`);
+    assert_1.default(0 <= randomizationFactor && randomizationFactor <= 1, `The randomization factor must be between 0 and 1, inclusive`);
+    assert_1.default(minBackoff >= 0, `The minimum backoff interval must be positive`);
+    let nextBackoff = initialBackoff * multiplier ** previousRetryCount;
+    // Apply jitter within the negative to positive range of the randomization factor
+    let jitterFactor = 1 - randomizationFactor + 2 * randomizationFactor * Math.random();
+    return Math.min(Math.max(nextBackoff * jitterFactor, minBackoff), maxBackoff);
+}
+exports.computeNextBackoffInterval = computeNextBackoffInterval;
+//# sourceMappingURL=backoff.js.map

smart-app-city/frontend/node_modules/@ide/backoff/build/backoff.js.map

@@ -0,0 +1 @@
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