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/json-parse-better-errors/README.md

@@ -0,0 +1,46 @@
+# json-parse-better-errors [![npm version](https://img.shields.io/npm/v/json-parse-better-errors.svg)](https://npm.im/json-parse-better-errors) [![license](https://img.shields.io/npm/l/json-parse-better-errors.svg)](https://npm.im/json-parse-better-errors) [![Travis](https://img.shields.io/travis/zkat/json-parse-better-errors.svg)](https://travis-ci.org/zkat/json-parse-better-errors) [![AppVeyor](https://ci.appveyor.com/api/projects/status/github/zkat/json-parse-better-errors?svg=true)](https://ci.appveyor.com/project/zkat/json-parse-better-errors) [![Coverage Status](https://coveralls.io/repos/github/zkat/json-parse-better-errors/badge.svg?branch=latest)](https://coveralls.io/github/zkat/json-parse-better-errors?branch=latest)
+
+[`json-parse-better-errors`](https://github.com/zkat/json-parse-better-errors) is a Node.js library for
+getting nicer errors out of `JSON.parse()`, including context and position of the parse errors.
+
+## Install
+
+`$ npm install --save json-parse-better-errors`
+
+## Table of Contents
+
+* [Example](#example)
+* [Features](#features)
+* [Contributing](#contributing)
+* [API](#api)
+  * [`parse`](#parse)
+
+### Example
+
+```javascript
+const parseJson = require('json-parse-better-errors')
+
+parseJson('"foo"')
+parseJson('garbage') // more useful error message
+```
+
+### Features
+
+* Like JSON.parse, but the errors are better.
+
+### Contributing
+
+The npm team enthusiastically welcomes contributions and project participation! There's a bunch of things you can do if you want to contribute! The [Contributor Guide](CONTRIBUTING.md) has all the information you need for everything from reporting bugs to contributing entire new features. Please don't hesitate to jump in if you'd like to, or even ask us questions if something isn't clear.
+
+All participants and maintainers in this project are expected to follow [Code of Conduct](CODE_OF_CONDUCT.md), and just generally be excellent to each other.
+
+Please refer to the [Changelog](CHANGELOG.md) for project history details, too.
+
+Happy hacking!
+
+### API
+
+#### <a name="parse"></a> `> parse(txt, ?reviver, ?context=20)`
+
+Works just like `JSON.parse`, but will include a bit more information when an
+error happens.