feat(web): add Progressive Web App (PWA) support (#25274)

web/public/_offline.html

@@ -0,0 +1,129 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Dify - Offline</title>
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+        
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            min-height: 100vh;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            color: white;
+            text-align: center;
+            padding: 20px;
+        }
+        
+        .container {
+            max-width: 600px;
+            background: rgba(255, 255, 255, 0.1);
+            backdrop-filter: blur(10px);
+            border-radius: 20px;
+            padding: 40px;
+            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
+        }
+        
+        .icon {
+            width: 100px;
+            height: 100px;
+            margin: 0 auto 30px;
+            background: rgba(255, 255, 255, 0.2);
+            border-radius: 20px;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            font-size: 48px;
+        }
+        
+        h1 {
+            font-size: 32px;
+            font-weight: 600;
+            margin-bottom: 15px;
+        }
+        
+        p {
+            font-size: 18px;
+            line-height: 1.6;
+            opacity: 0.9;
+            margin-bottom: 30px;
+        }
+        
+        button {
+            background: white;
+            color: #764ba2;
+            border: none;
+            padding: 15px 30px;
+            font-size: 16px;
+            font-weight: 600;
+            border-radius: 50px;
+            cursor: pointer;
+            transition: transform 0.2s, box-shadow 0.2s;
+        }
+        
+        button:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
+        }
+        
+        button:active {
+            transform: translateY(0);
+        }
+        
+        @media (max-width: 640px) {
+            .container {
+                padding: 30px;
+            }
+            
+            h1 {
+                font-size: 24px;
+            }
+            
+            p {
+                font-size: 16px;
+            }
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="icon">
+            ⚡
+        </div>
+        <h1>You're Offline</h1>
+        <p>
+            It looks like you've lost your internet connection. 
+            Some features may not be available until you're back online.
+        </p>
+        <button onclick="window.location.reload()">
+            Try Again
+        </button>
+    </div>
+    
+    <script>
+        // Check for connection status changes
+        window.addEventListener('online', function() {
+            window.location.reload();
+        });
+        
+        // Periodically check if online
+        setInterval(function() {
+            fetch(window.location.origin, { method: 'HEAD' })
+                .then(function() {
+                    window.location.reload();
+                })
+                .catch(function() {
+                    // Still offline
+                });
+        }, 5000);
+    </script>
+</body>
+</html>

web/public/browserconfig.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square70x70logo src="/icon-72x72.png"/>
+            <square150x150logo src="/icon-152x152.png"/>
+            <square310x310logo src="/icon-512x512.png"/>
+            <TileColor>#1C64F2</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>

web/public/fallback-hxi5kegOl0PxtKhvDL_OX.js

@@ -0,0 +1 @@
+(()=>{"use strict";self.fallback=async e=>"document"===e.destination?caches.match("/_offline.html",{ignoreSearch:!0}):Response.error()})();

web/public/manifest.json

@@ -0,0 +1,58 @@
+{
+  "name": "Dify",
+  "short_name": "Dify",
+  "description": "Build Production Ready Agentic AI Solutions",
+  "icons": [
+    {
+      "src": "/icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "maskable"
+    },
+    {
+      "src": "/icon-256x256.png",
+      "sizes": "256x256",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-384x384.png",
+      "sizes": "384x384",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "theme_color": "#1C64F2",
+  "background_color": "#ffffff",
+  "display": "standalone",
+  "scope": "/",
+  "start_url": "/",
+  "orientation": "portrait-primary",
+  "categories": ["productivity", "utilities", "developer"],
+  "lang": "en-US",
+  "dir": "ltr",
+  "prefer_related_applications": false,
+  "shortcuts": [
+    {
+      "name": "Apps",
+      "short_name": "Apps",
+      "url": "/apps",
+      "icons": [{ "src": "/icon-96x96.png", "sizes": "96x96" }]
+    },
+    {
+      "name": "Datasets",
+      "short_name": "Datasets",
+      "url": "/datasets",
+      "icons": [{ "src": "/icon-96x96.png", "sizes": "96x96" }]
+    }
+  ]
+}