feat: download icon on webapp cards for auto-install

app/src/main/assets/h5/css/app.css

@@ -483,6 +483,33 @@ body {
   color: var(--text-dim);
 }
 
+/* 下载离线包图标（右下角，云端有离线包时显示） */
+/* Download-offline-package icon (bottom-right, shown when cloud has a package) */
+.wcell-dl {
+  position: absolute;
+  bottom: 6px;
+  right: 6px;
+  width: 26px;
+  height: 26px;
+  border-radius: 999px;
+  background: var(--glass-bg);
+  border: 1px solid var(--glass-border);
+  color: var(--accent);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+}
+
+.wcell-dl svg {
+  width: 14px;
+  height: 14px;
+}
+
+.wcell-dl:active {
+  opacity: 0.6;
+}
+
 /* webAPP 顶栏：浮层玻璃条 + 标签面板 */
 /* webapp topbar: floating glass bar + tab panel */
 /* 前台有 webapp 时隐藏 webapp 列表内容，避免半透明顶栏透出列表控件 */

app/src/main/assets/h5/js/pages/webapplist.js

@@ -29,6 +29,19 @@ window.loadWebAppList = async function () {
       tag.className = 'tag';
       tag.textContent = a.offline ? '离线' : '在线';
       btn.append(img, lbl, tag);
+      // 云端有离线包 → 加下载图标（点击自动拉取安装）
+      // Cloud has an offline package -> add a download icon (tap to auto-install)
+      if (a.offline) {
+        const dl = document.createElement('span');
+        dl.className = 'wcell-dl';
+        dl.title = '下载离线包';
+        dl.innerHTML = '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 3v12"/><path d="M7 10l5 5 5-5"/><path d="M5 21h14"/></svg>';
+        dl.onclick = (e) => {
+          e.stopPropagation();
+          bridge.call('updateOfflinePackage', a.id).then(() => refreshList()).catch(() => {});
+        };
+        btn.appendChild(dl);
+      }
       btn.onclick = () => bridge.call('openWebApp', btn.dataset.id);
       setupLongPress(btn, a);
       grid.appendChild(btn);