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/zustand/system/react/shallow.development.js

@@ -0,0 +1,60 @@
+System.register(['react'], (function (exports) {
+  'use strict';
+  var ReactExports;
+  return {
+    setters: [function (module) {
+      ReactExports = module.default;
+    }],
+    execute: (function () {
+
+      exports("useShallow", useShallow);
+
+      function shallow(objA, objB) {
+        if (Object.is(objA, objB)) {
+          return true;
+        }
+        if (typeof objA !== "object" || objA === null || typeof objB !== "object" || objB === null) {
+          return false;
+        }
+        if (objA instanceof Map && objB instanceof Map) {
+          if (objA.size !== objB.size) return false;
+          for (const [key, value] of objA) {
+            if (!Object.is(value, objB.get(key))) {
+              return false;
+            }
+          }
+          return true;
+        }
+        if (objA instanceof Set && objB instanceof Set) {
+          if (objA.size !== objB.size) return false;
+          for (const value of objA) {
+            if (!objB.has(value)) {
+              return false;
+            }
+          }
+          return true;
+        }
+        const keysA = Object.keys(objA);
+        if (keysA.length !== Object.keys(objB).length) {
+          return false;
+        }
+        for (const keyA of keysA) {
+          if (!Object.prototype.hasOwnProperty.call(objB, keyA) || !Object.is(objA[keyA], objB[keyA])) {
+            return false;
+          }
+        }
+        return true;
+      }
+
+      const { useRef } = ReactExports;
+      function useShallow(selector) {
+        const prev = useRef();
+        return (state) => {
+          const next = selector(state);
+          return shallow(prev.current, next) ? prev.current : prev.current = next;
+        };
+      }
+
+    })
+  };
+}));

smart-app-city/frontend/node_modules/zustand/system/react/shallow.production.js

@@ -0,0 +1 @@
+System.register(["react"],function(o){"use strict";var c;return{setters:[function(s){c=s.default}],execute:function(){o("useShallow",u);function s(r,t){if(Object.is(r,t))return!0;if(typeof r!="object"||r===null||typeof t!="object"||t===null)return!1;if(r instanceof Map&&t instanceof Map){if(r.size!==t.size)return!1;for(const[e,i]of r)if(!Object.is(i,t.get(e)))return!1;return!0}if(r instanceof Set&&t instanceof Set){if(r.size!==t.size)return!1;for(const e of r)if(!t.has(e))return!1;return!0}const n=Object.keys(r);if(n.length!==Object.keys(t).length)return!1;for(const e of n)if(!Object.prototype.hasOwnProperty.call(t,e)||!Object.is(r[e],t[e]))return!1;return!0}const{useRef:f}=c;function u(r){const t=f();return n=>{const e=r(n);return s(t.current,e)?t.current:t.current=e}}}}});