fix: phần code build android

frontend/src/utils/backendEndpoint.ts

@@ -0,0 +1,46 @@
+/**
+ * Smart runtime backend URL resolver.
+ *
+ * Eliminates the need to manually update `.env` files when switching between:
+ *  - Docker/Linux Production Web Server  → uses window.location.origin
+ *  - Android APK (Capacitor WebView)     → forces absolute production domain
+ *
+ * Priority order:
+ *  1. Explicit VITE_BACKEND_URL env variable (if set at build time)
+ *  2. Android/Capacitor app detection    → https://yotrip.labz.io.vn
+ *  3. Production web server              → window.location.origin
+ */
+
+const PRODUCTION_DOMAIN = 'https://yotrip.labz.io.vn';
+
+const resolveBackendEndpoint = (): string => {
+  // 1. Honour explicit build-time env override first
+  const envUrl = import.meta.env.VITE_BACKEND_URL as string | undefined;
+  if (envUrl) {
+    return envUrl;
+  }
+
+  const origin = window.location.origin;
+  const userAgent = navigator.userAgent.toLowerCase();
+
+  // 2. Detect Android APK / Capacitor WebView environment
+  //    These shells run on local/file:// origins, not the production domain.
+  const isAndroidApp =
+    origin.startsWith('http://localhost') ||
+    origin.startsWith('capacitor://') ||
+    origin.startsWith('file://') ||
+    (userAgent.includes('android') && !origin.includes('yotrip.labz.io.vn'));
+
+  if (isAndroidApp) {
+    console.log('[Backend] 📱 Android/Capacitor environment detected — using production domain.');
+    return PRODUCTION_DOMAIN;
+  }
+
+  // 3. Web production server: the origin IS the backend (same Docker host)
+  return origin;
+};
+
+/** Resolved backend base URL for the current runtime environment. */
+export const BACKEND_URL: string = resolveBackendEndpoint();
+
+console.log(`[Backend] 🌐 Active endpoint: ${BACKEND_URL}`);

frontend/src/utils/nativePatch.ts

@@ -1,6 +1,7 @@
 import { Capacitor } from '@capacitor/core';
 import { GoogleAuth } from '@codetrix-studio/capacitor-google-auth';
 import { LocalNotifications } from '@capacitor/local-notifications';
+import { BACKEND_URL } from './backendEndpoint';
 
 function rewriteUrls(obj: any, backendUrl: string): any {
   if (obj === null || obj === undefined) return obj;
@@ -47,7 +48,7 @@ if (Capacitor.isNativePlatform()) {
     console.error('[LocalNotifications] Failed to request permissions:', e);
   }
 
-  const backendUrl = import.meta.env.VITE_BACKEND_URL || 'https://yotrip.labz.io.vn';
+  const backendUrl = BACKEND_URL;
 
   const originalFetch = window.fetch;
   window.fetch = async (input: RequestInfo | URL, init?: RequestInit): Promise<Response> => {