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/image-size/dist/utils/bit-reader.d.ts

@@ -0,0 +1,10 @@
+/** This class helps read Uint8Array bit-by-bit */
+export declare class BitReader {
+    private readonly input;
+    private readonly endianness;
+    private byteOffset;
+    private bitOffset;
+    constructor(input: Uint8Array, endianness: 'big-endian' | 'little-endian');
+    /** Reads a specified number of bits, and move the offset */
+    getBits(length?: number): number;
+}

smart-app-city/frontend/node_modules/image-size/dist/utils/bit-reader.js

@@ -0,0 +1,44 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.BitReader = void 0;
+/** This class helps read Uint8Array bit-by-bit */
+class BitReader {
+    constructor(input, endianness) {
+        this.input = input;
+        this.endianness = endianness;
+        // Skip the first 16 bits (2 bytes) of signature
+        this.byteOffset = 2;
+        this.bitOffset = 0;
+    }
+    /** Reads a specified number of bits, and move the offset */
+    getBits(length = 1) {
+        let result = 0;
+        let bitsRead = 0;
+        while (bitsRead < length) {
+            if (this.byteOffset >= this.input.length) {
+                throw new Error('Reached end of input');
+            }
+            const currentByte = this.input[this.byteOffset];
+            const bitsLeft = 8 - this.bitOffset;
+            const bitsToRead = Math.min(length - bitsRead, bitsLeft);
+            if (this.endianness === 'little-endian') {
+                const mask = (1 << bitsToRead) - 1;
+                const bits = (currentByte >> this.bitOffset) & mask;
+                result |= bits << bitsRead;
+            }
+            else {
+                const mask = ((1 << bitsToRead) - 1) << (8 - this.bitOffset - bitsToRead);
+                const bits = (currentByte & mask) >> (8 - this.bitOffset - bitsToRead);
+                result = (result << bitsToRead) | bits;
+            }
+            bitsRead += bitsToRead;
+            this.bitOffset += bitsToRead;
+            if (this.bitOffset === 8) {
+                this.byteOffset++;
+                this.bitOffset = 0;
+            }
+        }
+        return result;
+    }
+}
+exports.BitReader = BitReader;