启用轻量级PWA：manifest.json+桌面图标+全屏模式

frontend/index.html

@@ -10,6 +10,7 @@
     <meta name="apple-mobile-web-app-title" content="轻远ERP" />
     <meta name="description" content="轻远电力老挝分公司财务管理系统" />
     <link rel="apple-touch-icon" href="/logo.png" />
+    <link rel="manifest" href="/manifest.json" />
     <title>轻远电力老挝ERP - Qingyuan Power Laos</title>
     <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
     <meta http-equiv="Pragma" content="no-cache">

frontend/public/manifest.json

@@ -0,0 +1,25 @@
+{
+  "name": "轻远电力老挝ERP",
+  "short_name": "轻远ERP",
+  "description": "轻远电力老挝分公司财务管理系统",
+  "start_url": "/",
+  "display": "standalone",
+  "orientation": "portrait",
+  "background_color": "#ffffff",
+  "theme_color": "#1890ff",
+  "lang": "zh-CN",
+  "icons": [
+    {
+      "src": "/logo-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/logo-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    }
+  ]
+}