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/@expo/config-plugins/build/android/EasBuildGradleScript.js

@@ -0,0 +1,82 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = exports.default = `// Build integration with EAS
+
+import java.nio.file.Paths
+
+android {
+  signingConfigs {
+    release {
+      // This is necessary to avoid needing the user to define a release signing config manually
+      // If no release config is defined, and this is not present, build for assembleRelease will crash
+    }
+  }
+
+  buildTypes {
+    release {
+      // This is necessary to avoid needing the user to define a release build type manually
+    }
+  }
+}
+
+def isEasBuildConfigured = false
+
+tasks.whenTaskAdded {
+  def debug = gradle.startParameter.taskNames.any { it.toLowerCase().contains('debug') }
+
+  if (debug) {
+    return
+  }
+
+  // We only need to configure EAS build once
+  if (isEasBuildConfigured) {
+    return
+  }
+
+  isEasBuildConfigured = true;
+
+  android.signingConfigs.release {
+    def credentialsJson = rootProject.file("../credentials.json");
+
+    if (credentialsJson.exists()) {
+      if (storeFile && !System.getenv("EAS_BUILD")) {
+        println("Path to release keystore file is already set, ignoring 'credentials.json'")
+      } else {
+        try {
+          def credentials = new groovy.json.JsonSlurper().parse(credentialsJson)
+          def keystorePath = Paths.get(credentials.android.keystore.keystorePath);
+          def storeFilePath = keystorePath.isAbsolute()
+            ? keystorePath
+            : rootProject.file("..").toPath().resolve(keystorePath);
+
+          storeFile storeFilePath.toFile()
+          storePassword credentials.android.keystore.keystorePassword
+          keyAlias credentials.android.keystore.keyAlias
+          if (credentials.android.keystore.containsKey("keyPassword")) {
+            keyPassword credentials.android.keystore.keyPassword
+          } else {
+            // key password is required by Gradle, but PKCS keystores don't have one
+            // using the keystore password seems to satisfy the requirement
+            keyPassword credentials.android.keystore.keystorePassword
+          }
+        } catch (Exception e) {
+          println("An error occurred while parsing 'credentials.json': " + e.message)
+        }
+      }
+    } else {
+      if (storeFile == null) {
+        println("Couldn't find a 'credentials.json' file, skipping release keystore configuration")
+      }
+    }
+  }
+
+  android.buildTypes.release {
+    signingConfig android.signingConfigs.release
+  }
+}
+`;
+//# sourceMappingURL=EasBuildGradleScript.js.map