feat: add multi-tab support to remote browser

frontend/src/views/PageViewer.vue

@@ -64,6 +64,26 @@
     <div class="viewer-body">
       <div v-if="isRemoteBrowser" class="viewer-content viewer-content-remote">
         <div class="viewer-stage" :class="{ 'viewer-stage-error': showRemoteError }">
+          <!-- Multi-tab bar -->
+          <div v-if="!showRemoteError && remoteSession?.tabs?.length" class="remote-tabs">
+            <div
+              v-for="tab in remoteSession.tabs"
+              :key="tab.id"
+              class="remote-tab"
+              :class="{ active: tab.id === remoteSession.active_tab_id }"
+              @click="switchRemoteTab(tab.id)"
+            >
+              <span class="tab-title" :title="tab.url">{{ tab.title || 'Loading...' }}</span>
+              <el-icon
+                v-if="remoteSession.tabs.length > 1"
+                class="tab-close"
+                @click.stop="closeRemoteTab(tab.id)"
+              >
+                <Close />
+              </el-icon>
+            </div>
+          </div>
+
           <div
             v-if="!showRemoteError"
             ref="remoteFrameRef"
@@ -153,7 +173,7 @@ import { ElMessage, ElMessageBox } from 'element-plus'
 import {
   ArrowLeft, TopRight, Refresh, Loading, Back, Right, Warning, DocumentCopy, Delete, EditPen,
   Link as LinkIcon, Monitor, SetUp, Reading, Cpu, DataLine,
-  Grid, Connection, Ticket, Wallet, Key, Tools, Star, House,
+  Grid, Connection, Ticket, Wallet, Key, Tools, Star, House, Close,
 } from '@element-plus/icons-vue'
 import { browserSessionsApi, customPagesApi, type BrowserEventPayload, type BrowserSessionData, type CustomPageData } from '@/api'
 import { useAuthStore } from '@/stores/auth'
@@ -396,7 +416,7 @@ function connectRemoteWs() {
     // Text frame = JSON control message
     try {
       const msg = JSON.parse(evt.data as string)
-      if (msg.type === 'init' && msg.session) {
+      if ((msg.type === 'init' || msg.type === 'state') && msg.session) {
         remoteSession.value = msg.session as BrowserSessionData
         return
       }
@@ -477,6 +497,26 @@ function sendRemoteCommand(type: 'reload' | 'back' | 'forward') {
   sendRemoteEvent({ type })
 }
 
+async function switchRemoteTab(tabId: string) {
+  if (!remoteSession.value || remoteSession.value.active_tab_id === tabId) return
+  try {
+    const res = await browserSessionsApi.activateTab(remoteSession.value.id, tabId)
+    remoteSession.value = res.data
+  } catch (e: any) {
+    ElMessage.error(e.response?.data?.detail || '切换标签页失败')
+  }
+}
+
+async function closeRemoteTab(tabId: string) {
+  if (!remoteSession.value) return
+  try {
+    const res = await browserSessionsApi.closeTab(remoteSession.value.id, tabId)
+    remoteSession.value = res.data
+  } catch (e: any) {
+    ElMessage.error(e.response?.data?.detail || '关闭标签页失败')
+  }
+}
+
 async function copyRemoteSelection() {
   if (!remoteSession.value) return
   try {
@@ -1138,6 +1178,62 @@ onBeforeUnmount(() => {
     var(--bg-surface);
 }
 
+.remote-tabs {
+  display: flex;
+  background: rgba(0, 0, 0, 0.2);
+  border-bottom: 1px solid rgba(140, 119, 98, 0.15);
+  padding: 4px 6px 0;
+  gap: 2px;
+  overflow-x: auto;
+  scrollbar-width: none;
+}
+.remote-tabs::-webkit-scrollbar { display: none; }
+
+.remote-tab {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 5px 10px;
+  background: rgba(255, 255, 255, 0.04);
+  border-radius: 8px 8px 0 0;
+  color: var(--text-soft);
+  font-size: 11px;
+  cursor: pointer;
+  white-space: nowrap;
+  max-width: 180px;
+  transition: all 0.2s;
+  border: 1px solid transparent;
+  border-bottom: none;
+}
+
+.remote-tab:hover {
+  background: rgba(255, 255, 255, 0.08);
+  color: var(--text-primary);
+}
+
+.remote-tab.active {
+  background: var(--bg-surface);
+  color: var(--text-primary);
+  font-weight: 600;
+  border-color: rgba(140, 119, 98, 0.15);
+}
+
+.tab-title {
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.tab-close {
+  font-size: 12px;
+  padding: 2px;
+  border-radius: 4px;
+}
+.tab-close:hover {
+  background: rgba(255, 255, 255, 0.1);
+  color: #f56c6c;
+}
+
 .page-iframe {
   width: 100%;
   height: 100%;