feat: webapp topbar and tab switching

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

@@ -130,3 +130,98 @@ body {
   border: 1px solid var(--glass-border);
   color: var(--text-dim);
 }
+
+/* webAPP 顶栏：浮层玻璃条 + 标签面板 */
+/* webapp topbar: floating glass bar + tab panel */
+#web-topbar {
+  position: fixed;
+  top: 12px;
+  left: 50%;
+  transform: translateX(-50%);
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 6px 10px;
+  border-radius: 999px;
+  background: var(--glass-bg);
+  backdrop-filter: blur(20px) saturate(1.2);
+  -webkit-backdrop-filter: blur(20px) saturate(1.2);
+  border: 1px solid var(--glass-border);
+  z-index: 100;
+}
+
+#web-topbar button {
+  width: 30px;
+  height: 30px;
+  border: none;
+  border-radius: 999px;
+  background: none;
+  color: var(--text);
+  font-size: 16px;
+  cursor: pointer;
+}
+
+#web-topbar button:active { background: var(--glass-border); }
+
+#web-topbar #tb-tabs {
+  width: auto;
+  padding: 0 12px;
+  font-size: 13px;
+  color: var(--text-dim);
+}
+
+#web-topbar .tb-title {
+  max-width: 200px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-size: 14px;
+  color: var(--text);
+}
+
+#tab-panel {
+  position: fixed;
+  top: 56px;
+  right: 16px;
+  display: none;
+  min-width: 180px;
+  max-width: 260px;
+  padding: 8px;
+  border-radius: 16px;
+  background: var(--glass-bg);
+  backdrop-filter: blur(20px) saturate(1.2);
+  -webkit-backdrop-filter: blur(20px) saturate(1.2);
+  border: 1px solid var(--glass-border);
+  z-index: 100;
+}
+
+#tab-panel .tab-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  padding: 8px 10px;
+  border-radius: 10px;
+  cursor: pointer;
+}
+
+#tab-panel .tab-row.active { background: var(--accent); color: #fff; }
+
+#tab-panel .tab-name {
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-size: 13px;
+}
+
+#tab-panel .tab-close {
+  border: none;
+  background: none;
+  color: inherit;
+  font-size: 16px;
+  cursor: pointer;
+  opacity: 0.7;
+}
+
+#tab-panel .tab-close:hover { opacity: 1; }

app/src/main/assets/h5/index.html

@@ -25,6 +25,8 @@
 <script src="js/router.js"></script>
 <script src="js/pages/applist.js"></script>
 <script src="js/pages/webapplist.js"></script>
+<script src="js/webapp/tabs.js"></script>
+<script src="js/webapp/topbar.js"></script>
 <script>
   // 渲染侧边栏导航项 / render sidebar nav items
   const nav = document.getElementById('rail-nav');

app/src/main/assets/h5/js/webapp/tabs.js

@@ -0,0 +1,27 @@
+// webAPP 标签状态纯函数：不可变风格，Node 可 require、浏览器挂 window.tabsStore
+// webapp tab state pure functions: immutable style, Node-requireable, browser exposes window.tabsStore
+(function (root, factory) {
+  if (typeof module === 'object' && module.exports) module.exports = factory();
+  else root.tabsStore = factory();
+})(typeof self !== 'undefined' ? self : this, function () {
+  // 新增/激活标签：id 不存在才 push，返回激活 id 的新数组，不修改原数组
+  // Add/activate a tab: push only if id missing, return a new array with id active
+  function add(tabs, id, name) {
+    const base = tabs.some(t => t.id === id) ? tabs : tabs.concat({ id, name });
+    return base.map(t => ({ ...t, active: t.id === id }));
+  }
+
+  // 删除标签：过滤掉 id，返回新数组，不修改原数组
+  // Remove a tab: filter out id, return a new array
+  function remove(tabs, id) {
+    return tabs.filter(t => t.id !== id);
+  }
+
+  // 切换激活标签：返回激活 id 的新数组，不修改原数组
+  // Switch active tab: return a new array with id active
+  function switchTo(tabs, id) {
+    return tabs.map(t => ({ ...t, active: t.id === id }));
+  }
+
+  return { add, remove, switchTo };
+});

app/src/main/assets/h5/js/webapp/topbar.js

@@ -0,0 +1,59 @@
+// webAPP 顶栏：回退/前进/重载 + 标题 + 标签面板（切换/关闭）
+// webapp topbar: back/forward/reload + title + tab panel (switch/close)
+// 原生方法（webGoBack/webGoForward/webReload/switchTab/closeWebApp）Task 13 才实现，
+// 此处仅作为调用方，点击会静默 reject（符合预期）。
+// Native methods (webGoBack/webGoForward/webReload/switchTab/closeWebApp) land in Task 13;
+// this topbar is only a caller, clicks silently reject (expected).
+
+// 展示/刷新顶栏：tabs 为标签数组（含 active 标记）
+// Show/refresh the topbar: tabs is the tab array (with active flag)
+window.showTopbar = function (tabs) {
+  let bar = document.getElementById('web-topbar');
+  if (!bar) {
+    bar = document.createElement('div');
+    bar.id = 'web-topbar';
+    bar.innerHTML = `
+      <button id="tb-back" title="回退">←</button>
+      <button id="tb-fwd" title="前进">→</button>
+      <button id="tb-reload" title="重载">⟳</button>
+      <span class="tb-title" id="tb-title"></span>
+      <button id="tb-tabs"></button>`;
+    document.body.appendChild(bar);
+    document.getElementById('tb-back').onclick = () => bridge.call('webGoBack');
+    document.getElementById('tb-fwd').onclick = () => bridge.call('webGoForward');
+    document.getElementById('tb-reload').onclick = () => bridge.call('webReload');
+    document.getElementById('tb-tabs').onclick = () => showTabPanel(tabs);
+  }
+  document.getElementById('tb-tabs').textContent = `标签 (${tabs.length})`;
+  const active = tabs.find(t => t.active);
+  document.getElementById('tb-title').textContent = active ? active.name : '';
+};
+
+// 标签面板：列出所有标签，点击切换，× 关闭
+// Tab panel: list all tabs, click to switch, × to close
+function showTabPanel(tabs) {
+  let panel = document.getElementById('tab-panel');
+  if (!panel) {
+    panel = document.createElement('div');
+    panel.id = 'tab-panel';
+    document.body.appendChild(panel);
+  }
+  panel.innerHTML = tabs.map(t => `
+    <div class="tab-row ${t.active ? 'active' : ''}" data-id="${t.id}">
+      <span class="tab-name">${t.name}</span>
+      <button class="tab-close" title="关闭">×</button>
+    </div>`).join('');
+  panel.querySelectorAll('.tab-row').forEach(row => {
+    const id = row.dataset.id;
+    row.querySelector('.tab-name').onclick = () => { bridge.call('switchTab', id); closeTabPanel(); };
+    row.querySelector('.tab-close').onclick = () => bridge.call('closeWebApp', id);
+  });
+  panel.style.display = 'block';
+}
+
+// 收起标签面板
+// Collapse the tab panel
+function closeTabPanel() {
+  const panel = document.getElementById('tab-panel');
+  if (panel) panel.style.display = 'none';
+}

h5-test/tabs.test.js

@@ -0,0 +1,37 @@
+// tabs.js 纯函数测试：不可变风格，验证 add/remove/switchTo
+// tabs.js pure-function tests: immutable style, verify add/remove/switchTo
+const { test } = require('node:test');
+const assert = require('node:assert');
+const { add, remove, switchTo } = require('../app/src/main/assets/h5/js/webapp/tabs.js');
+
+test('add 不存在时新增并激活，已存在时不重复', () => {
+  let tabs = [];
+  tabs = add(tabs, 'a', '云音乐');
+  tabs = add(tabs, 'b', '天气');
+  tabs = add(tabs, 'a', '云音乐');
+  assert.strictEqual(tabs.length, 2, '重复 id 不应重复添加');
+  assert.strictEqual(tabs.filter(t => t.active).length, 1, '仅一个激活标签');
+  assert.strictEqual(tabs.find(t => t.active).id, 'a', '重复添加应重新激活该 id');
+});
+
+test('add 不修改传入数组（不可变）', () => {
+  const before = [];
+  const after = add(before, 'a', 'x');
+  assert.strictEqual(before.length, 0, '原数组不应被改动');
+  assert.strictEqual(after.length, 1);
+});
+
+test('remove 删除指定标签', () => {
+  let tabs = [{ id: 'a', name: 'x', active: false }, { id: 'b', name: 'y', active: true }];
+  tabs = remove(tabs, 'a');
+  assert.strictEqual(tabs.length, 1);
+  assert.strictEqual(tabs[0].id, 'b');
+});
+
+test('switchTo 激活指定 id 且不修改原数组', () => {
+  const before = [{ id: 'a', name: 'x', active: true }, { id: 'b', name: 'y', active: false }];
+  const after = switchTo(before, 'b');
+  assert.strictEqual(after.find(t => t.id === 'b').active, true);
+  assert.strictEqual(after.filter(t => t.active).length, 1);
+  assert.strictEqual(before.find(t => t.id === 'b').active, false, '原数组不应被改动');
+});