初始版本 - Metona Ollama Client v1.1.0

sw.js

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+/**
+ * Service Worker - PWA 离线支持
+ * 缓存应用资源以便离线使用
+ */
+
+const CACHE_NAME = 'metona-ollama-v3';
+const ASSETS = [
+    './',
+    './index.html',
+    './style.css',
+    './chat-db.js',
+    './marked.esm.js',
+    './ollama-api.js',
+    './manifest.json'
+];
+
+// 安装阶段：预缓存核心资源
+self.addEventListener('install', (event) => {
+    event.waitUntil(
+        caches.open(CACHE_NAME)
+            .then(cache => cache.addAll(ASSETS))
+            .then(() => self.skipWaiting())
+    );
+});
+
+// 激活阶段：清理旧缓存
+self.addEventListener('activate', (event) => {
+    event.waitUntil(
+        caches.keys()
+            .then(keys => Promise.all(
+                keys.filter(key => key !== CACHE_NAME).map(key => caches.delete(key))
+            ))
+            .then(() => self.clients.claim())
+    );
+});
+
+// 拦截请求：缓存优先，网络回退
+self.addEventListener('fetch', (event) => {
+    // 不拦截非 GET 请求
+    if (event.request.method !== 'GET') return;
+
+    event.respondWith(
+        caches.match(event.request)
+            .then(cached => {
+                if (cached) return cached;
+                return fetch(event.request).then(response => {
+                    // 仅缓存成功的响应
+                    if (response && response.status === 200) {
+                        const clone = response.clone();
+                        caches.open(CACHE_NAME).then(cache => cache.put(event.request, clone));
+                    }
+                    return response;
+                }).catch(() => {
+                    // 离线且无缓存时返回简单提示
+                    if (event.request.destination === 'document') {
+                        return new Response('离线模式：请检查网络连接', {
+                            headers: { 'Content-Type': 'text/plain; charset=utf-8' }
+                        });
+                    }
+                });
+            })
+    );
+});