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/freeport-async/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2015 650 Industries
+
+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/freeport-async/README.md

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+# freeport-async
+
+Finds an available port for your application to use.
+You can specify a range where to look for an available port.
+And can also find a range of available ports for you to use.
+You can also be used to test to see if a given port is available.
+
+All functions are async and return Promises.
+
+## Usage
+
+### Basic
+
+```js
+let freeportAsync = require("freeport-async");
+
+let portICanUse = await freeportAsync();
+```
+
+### Advanced
+
+```js
+let freeportAsync = require("freeport-async");
+
+let portIn9000Range = await freeportAsync(9000);
+
+let portAvailableForAnyOrLocalhost = await freeportAsync(9000, {
+  hostnames: [null, "localhost"]
+});
+
+let isPort5000Available = await freeportAsync.availableAsync(5000);
+
+let listOf5ConsecutiveAvailablePorts = await freeportAsync.rangeAsync(5);
+
+let freeRangeIn12000Range = await freeportAsync.rangeAsync(3, 12000);
+```
+
+## Important Note
+
+Note that this code just finds available ports, but doesn't reserve them in any way.
+This means that if you have other code that might be looking for a port in the same range at the same time, you could run into issues.
+
+Also, if you call `freeportAsync` twice in a row, it will often return the same port number twice. If you want to find two (or more) ports you can use, you need to call `freeportAsync.rangeAsync(<number-of-ports>, [startSearchFrom])`.
+
+See also https://gist.github.com/mikeal/1840641

smart-app-city/frontend/node_modules/freeport-async/index.js

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+const net = require("net");
+
+const DEFAULT_PORT_RANGE_START = 11000;
+
+function testPortAsync(port, hostname) {
+  return new Promise(function(fulfill, reject) {
+    var server = net.createServer();
+    server.listen({ port: port, host: hostname }, function(err) {
+      server.once("close", function() {
+        setTimeout(() => fulfill(true), 0);
+      });
+      server.close();
+    });
+    server.on("error", function(err) {
+      setTimeout(() => fulfill(false), 0);
+    });
+  });
+}
+
+async function availableAsync(port, options = {}) {
+  const hostnames =
+    options.hostnames && options.hostnames.length ? options.hostnames : [null];
+  for (const hostname of hostnames) {
+    if (!(await testPortAsync(port, hostname))) {
+      return false;
+    }
+  }
+  return true;
+}
+
+function freePortRangeAsync(rangeSize, rangeStart, options = {}) {
+  rangeSize = rangeSize || 1;
+  return new Promise((fulfill, reject) => {
+    var lowPort = rangeStart || DEFAULT_PORT_RANGE_START;
+    var awaitables = [];
+    for (var i = 0; i < rangeSize; i++) {
+      awaitables.push(availableAsync(lowPort + i, options));
+    }
+    return Promise.all(awaitables).then(function(results) {
+      var ports = [];
+      for (var i = 0; i < results.length; i++) {
+        if (!results[i]) {
+          return freePortRangeAsync(
+            rangeSize,
+            lowPort + rangeSize,
+            options
+          ).then(fulfill, reject);
+        }
+        ports.push(lowPort + i);
+      }
+      fulfill(ports);
+    });
+  });
+}
+
+async function freePortAsync(rangeStart, options = {}) {
+  const result = await freePortRangeAsync(1, rangeStart, options);
+  return result[0];
+}
+
+module.exports = freePortAsync;
+
+module.exports.availableAsync = availableAsync;
+module.exports.rangeAsync = freePortRangeAsync;

smart-app-city/frontend/node_modules/freeport-async/package.json

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+{
+  "name": "freeport-async",
+  "version": "2.0.0",
+  "description": "Finds an available port for your application to use.",
+  "license": "MIT",
+  "main": "index.js",
+  "engines": {
+    "node": ">=8"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/expo/freeport-async.git"
+  },
+  "keywords": [
+    "port",
+    "free",
+    "open",
+    "new",
+    "fresh",
+    "clean",
+    "networking",
+    "mikeal"
+  ],
+  "author": "Expo",
+  "bugs": {
+    "url": "https://github.com/expo/freeport-async/issues"
+  },
+  "homepage": "https://github.com/expo/freeport-async/blob/master/README.md",
+  "devDependencies": {
+    "project-repl": "^1.5.0"
+  }
+}

smart-app-city/frontend/node_modules/freeport-async/repl

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+#!/usr/bin/env sh
+node --experimental-repl-await -i -e "require('project-repl')('.', (x) => require(x));" $*

smart-app-city/frontend/node_modules/freeport-async/yarn.lock

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+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
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+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
+  integrity sha1-ibTRmasr7kneFk6gK4nORi1xt2c=
+
+brace-expansion@^1.1.7:
+  version "1.1.11"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
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+  dependencies:
+    balanced-match "^1.0.0"
+    concat-map "0.0.1"
+
+concat-map@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
+  integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
+
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+  version "3.0.4"
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+  dependencies:
+    brace-expansion "^1.1.7"
+
+project-repl@^1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/project-repl/-/project-repl-1.5.0.tgz#695d945235594eebe32d80c7ebea2318cb81487f"
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+  dependencies:
+    recursive-readdir "^2.2.2"
+
+recursive-readdir@^2.2.2:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/recursive-readdir/-/recursive-readdir-2.2.2.tgz#9946fb3274e1628de6e36b2f6714953b4845094f"
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+  dependencies:
+    minimatch "3.0.4"