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/string-width/node_modules/is-fullwidth-code-point/index.d.ts

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+/**
+Check if the character represented by a given [Unicode code point](https://en.wikipedia.org/wiki/Code_point) is [fullwidth](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms).
+
+@param codePoint - The [code point](https://en.wikipedia.org/wiki/Code_point) of a character.
+
+@example
+```
+import isFullwidthCodePoint from 'is-fullwidth-code-point';
+
+isFullwidthCodePoint('谢'.codePointAt(0));
+//=> true
+
+isFullwidthCodePoint('a'.codePointAt(0));
+//=> false
+```
+*/
+export default function isFullwidthCodePoint(codePoint: number): boolean;

smart-app-city/frontend/node_modules/string-width/node_modules/is-fullwidth-code-point/index.js

@@ -0,0 +1,50 @@
+/* eslint-disable yoda */
+'use strict';
+
+const isFullwidthCodePoint = codePoint => {
+	if (Number.isNaN(codePoint)) {
+		return false;
+	}
+
+	// Code points are derived from:
+	// http://www.unix.org/Public/UNIDATA/EastAsianWidth.txt
+	if (
+		codePoint >= 0x1100 && (
+			codePoint <= 0x115F || // Hangul Jamo
+			codePoint === 0x2329 || // LEFT-POINTING ANGLE BRACKET
+			codePoint === 0x232A || // RIGHT-POINTING ANGLE BRACKET
+			// CJK Radicals Supplement .. Enclosed CJK Letters and Months
+			(0x2E80 <= codePoint && codePoint <= 0x3247 && codePoint !== 0x303F) ||
+			// Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A
+			(0x3250 <= codePoint && codePoint <= 0x4DBF) ||
+			// CJK Unified Ideographs .. Yi Radicals
+			(0x4E00 <= codePoint && codePoint <= 0xA4C6) ||
+			// Hangul Jamo Extended-A
+			(0xA960 <= codePoint && codePoint <= 0xA97C) ||
+			// Hangul Syllables
+			(0xAC00 <= codePoint && codePoint <= 0xD7A3) ||
+			// CJK Compatibility Ideographs
+			(0xF900 <= codePoint && codePoint <= 0xFAFF) ||
+			// Vertical Forms
+			(0xFE10 <= codePoint && codePoint <= 0xFE19) ||
+			// CJK Compatibility Forms .. Small Form Variants
+			(0xFE30 <= codePoint && codePoint <= 0xFE6B) ||
+			// Halfwidth and Fullwidth Forms
+			(0xFF01 <= codePoint && codePoint <= 0xFF60) ||
+			(0xFFE0 <= codePoint && codePoint <= 0xFFE6) ||
+			// Kana Supplement
+			(0x1B000 <= codePoint && codePoint <= 0x1B001) ||
+			// Enclosed Ideographic Supplement
+			(0x1F200 <= codePoint && codePoint <= 0x1F251) ||
+			// CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane
+			(0x20000 <= codePoint && codePoint <= 0x3FFFD)
+		)
+	) {
+		return true;
+	}
+
+	return false;
+};
+
+module.exports = isFullwidthCodePoint;
+module.exports.default = isFullwidthCodePoint;

smart-app-city/frontend/node_modules/string-width/node_modules/is-fullwidth-code-point/license

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+MIT License
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

smart-app-city/frontend/node_modules/string-width/node_modules/is-fullwidth-code-point/package.json

@@ -0,0 +1,42 @@
+{
+	"name": "is-fullwidth-code-point",
+	"version": "3.0.0",
+	"description": "Check if the character represented by a given Unicode code point is fullwidth",
+	"license": "MIT",
+	"repository": "sindresorhus/is-fullwidth-code-point",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "sindresorhus.com"
+	},
+	"engines": {
+		"node": ">=8"
+	},
+	"scripts": {
+		"test": "xo && ava && tsd-check"
+	},
+	"files": [
+		"index.js",
+		"index.d.ts"
+	],
+	"keywords": [
+		"fullwidth",
+		"full-width",
+		"full",
+		"width",
+		"unicode",
+		"character",
+		"string",
+		"codepoint",
+		"code",
+		"point",
+		"is",
+		"detect",
+		"check"
+	],
+	"devDependencies": {
+		"ava": "^1.3.1",
+		"tsd-check": "^0.5.0",
+		"xo": "^0.24.0"
+	}
+}

smart-app-city/frontend/node_modules/string-width/node_modules/is-fullwidth-code-point/readme.md

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+# is-fullwidth-code-point [![Build Status](https://travis-ci.org/sindresorhus/is-fullwidth-code-point.svg?branch=master)](https://travis-ci.org/sindresorhus/is-fullwidth-code-point)
+
+> Check if the character represented by a given [Unicode code point](https://en.wikipedia.org/wiki/Code_point) is [fullwidth](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms)
+
+
+## Install
+
+```
+$ npm install is-fullwidth-code-point
+```
+
+
+## Usage
+
+```js
+const isFullwidthCodePoint = require('is-fullwidth-code-point');
+
+isFullwidthCodePoint('谢'.codePointAt(0));
+//=> true
+
+isFullwidthCodePoint('a'.codePointAt(0));
+//=> false
+```
+
+
+## API
+
+### isFullwidthCodePoint(codePoint)
+
+#### codePoint
+
+Type: `number`
+
+The [code point](https://en.wikipedia.org/wiki/Code_point) of a character.
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)