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/yargs/locales/nl.json

@@ -0,0 +1,49 @@
+{
+  "Commands:": "Commando's:",
+  "Options:": "Opties:",
+  "Examples:": "Voorbeelden:",
+  "boolean": "booleaans",
+  "count": "aantal",
+  "string": "string",
+  "number": "getal",
+  "array": "lijst",
+  "required": "verplicht",
+  "default": "standaard",
+  "default:": "standaard:",
+  "choices:": "keuzes:",
+  "aliases:": "aliassen:",
+  "generated-value": "gegenereerde waarde",
+  "Not enough non-option arguments: got %s, need at least %s": {
+    "one": "Niet genoeg niet-optie-argumenten: %s gekregen, minstens %s nodig",
+    "other": "Niet genoeg niet-optie-argumenten: %s gekregen, minstens %s nodig"
+  },
+  "Too many non-option arguments: got %s, maximum of %s": {
+    "one": "Te veel niet-optie-argumenten: %s gekregen, maximum is %s",
+    "other": "Te veel niet-optie-argumenten: %s gekregen, maximum is %s"
+  },
+  "Missing argument value: %s": {
+    "one": "Missende argumentwaarde: %s",
+    "other": "Missende argumentwaarden: %s"
+  },
+  "Missing required argument: %s": {
+    "one": "Missend verplicht argument: %s",
+    "other": "Missende verplichte argumenten: %s"
+  },
+  "Unknown argument: %s": {
+    "one": "Onbekend argument: %s",
+    "other": "Onbekende argumenten: %s"
+  },
+  "Invalid values:": "Ongeldige waarden:",
+  "Argument: %s, Given: %s, Choices: %s": "Argument: %s, Gegeven: %s, Keuzes: %s",
+  "Argument check failed: %s": "Argumentcontrole mislukt: %s",
+  "Implications failed:": "Ontbrekende afhankelijke argumenten:",
+  "Not enough arguments following: %s": "Niet genoeg argumenten na: %s",
+  "Invalid JSON config file: %s": "Ongeldig JSON-config-bestand: %s",
+  "Path to JSON config file": "Pad naar JSON-config-bestand",
+  "Show help": "Toon help",
+  "Show version number": "Toon versienummer",
+  "Did you mean %s?": "Bedoelde u misschien %s?",
+  "Arguments %s and %s are mutually exclusive": "Argumenten %s en %s kunnen niet tegelijk gebruikt worden",
+  "Positionals:": "Positie-afhankelijke argumenten",
+  "command": "commando"
+}