feat: multi-connection parallel support

- connection store: connectedIds array, per-connection health/serverInfo maps
- connect() no longer disconnects existing connections
- New switchTo(id), disconnectById(id), isConnectedById(id) methods
- Per-connection health check timers (Map-based)
- ConnectionCard: switch to connected, connect if not, disconnect if active
- MainArea: per-connection tab state (save/restore on switch)
- Connection switcher dropdown in tab bar showing all open connections
- Clean up tab state when connection disconnects

ROADMAP.md

@@ -17,7 +17,7 @@
 - [x] **命令日志** — 记录每次命令的耗时/连接/时间，最多 5000 条，只写模式过滤
 - [x] **自动更新** — electron-updater 集成，启动检查，下载进度，发行说明
 - [x] **多标签页** — 单连接支持同时打开 Status/Keys/CLI/SlowLog/内存分析/批量删除 多个标签
-- [ ] **多连接并行** — 同时打开多个连接，各自独立标签页
+- [x] **多连接并行** — 同时打开多个连接，各自独立标签页
 - [ ] **Monaco 编辑器** — 替换 StringEditor 的 textarea，支持 JSON 折叠/展开/语法高亮
 - [ ] **Redis 命令自动补全** — CLI 输入时智能提示（基于 commands.js 命令数据库）
 - [ ] **CLI SUBSCRIBE/MONITOR** — 实时消息流 + MONITOR 命令流 + 停止按钮

src/components/ConnectionCard.vue

@@ -9,14 +9,19 @@ const emit = defineEmits<{ edit: [conn: ConnectionConfig]; delete: [id: string]
 const connStore = useConnectionStore()
 
 const isActive = computed(() => connStore.activeId === props.connection.id)
+const isConn = computed(() => connStore.isConnectedById(props.connection.id))
 const statusColor = computed(() => {
-  if (isActive.value) return 'var(--success)'
+  if (isConn.value) return 'var(--success)'
   return 'var(--text-muted)'
 })
 
 function handleClick() {
-  if (isActive.value) {
-    connStore.disconnect()
+  if (isConn.value) {
+    if (isActive.value) {
+      connStore.disconnect()
+    } else {
+      connStore.switchTo(props.connection.id)
+    }
   } else {
     connStore.connect(props.connection)
   }

src/components/MainArea.vue

@@ -133,24 +133,89 @@ function onWheel(e: WheelEvent) {
   activeTabId.value = tabs.value[nextIdx].id
 }
 
-// Reset tabs when connection state changes
+// Per-connection tab state
+const tabStateMap = new Map<string, { tabs: Tab[]; activeTabId: string }>()
+
+function saveTabState() {
+  if (connStore.activeId) {
+    tabStateMap.set(connStore.activeId, {
+      tabs: tabs.value,
+      activeTabId: activeTabId.value,
+    })
+  }
+}
+
+function restoreTabState(connId: string) {
+  const state = tabStateMap.get(connId)
+  if (state) {
+    tabs.value = state.tabs
+    activeTabId.value = state.activeTabId
+  } else {
+    tabs.value = [makeTab('status')]
+    activeTabId.value = tabs.value[0].id
+  }
+}
+
+// Connected connections for switcher
+const connectedConnections = computed(() =>
+  connStore.connections.filter(c => connStore.connectedIds.includes(c.id))
+)
+
+// Switch active connection, save/restore tabs
 watch(
-  () => connStore.isConnected,
-  (connected) => {
-    if (connected) {
-      tabs.value = [makeTab('status')]
-      activeTabId.value = tabs.value[0].id
+  () => connStore.activeId,
+  (newId, oldId) => {
+    if (oldId) saveTabState()
+    if (newId) {
+      restoreTabState(newId)
     } else {
       tabs.value = []
       activeTabId.value = ''
     }
   }
 )
+
+// Clean up tab state when connection disconnected
+watch(
+  () => connStore.connectedIds,
+  (ids) => {
+    // Remove tab state for disconnected connections
+    for (const key of tabStateMap.keys()) {
+      if (!ids.includes(key)) {
+        tabStateMap.delete(key)
+      }
+    }
+  },
+  { deep: true }
+)
 </script>
 
 <template>
   <div class="main-area" @click="closeContextMenu">
     <div class="tab-bar" v-if="connStore.isConnected" ref="tabBarRef" @wheel.passive="onWheel">
+      <!-- Connection switcher -->
+      <el-dropdown v-if="connectedConnections.length > 0" trigger="click" @command="connStore.switchTo($event)">
+        <div class="conn-switcher">
+          <span class="conn-dot" />
+          <span class="conn-name">{{ connStore.activeConnection?.name }}</span>
+          <el-icon v-if="connectedConnections.length > 1"><ArrowDown /></el-icon>
+        </div>
+        <template #dropdown>
+          <el-dropdown-menu>
+            <el-dropdown-item
+              v-for="conn in connectedConnections"
+              :key="conn.id"
+              :command="conn.id"
+              :class="{ 'is-active': conn.id === connStore.activeId }"
+            >
+              {{ conn.name }}
+              <span class="conn-host">{{ conn.host }}:{{ conn.port }}</span>
+            </el-dropdown-item>
+          </el-dropdown-menu>
+        </template>
+      </el-dropdown>
+      <div class="tab-divider" v-if="connectedConnections.length > 0" />
+      <!-- Tabs -->
       <div
         v-for="tab in tabs"
         :key="tab.id"
@@ -243,6 +308,53 @@ watch(
   position: relative;
 }
 
+.conn-switcher {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 8px 14px;
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--accent-light);
+  cursor: pointer;
+  white-space: nowrap;
+  flex-shrink: 0;
+}
+
+.conn-switcher:hover {
+  background: var(--bg-hover);
+}
+
+.conn-dot {
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  background: var(--success);
+  box-shadow: 0 0 6px var(--success);
+  flex-shrink: 0;
+}
+
+.conn-name {
+  max-width: 120px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.conn-host {
+  font-size: 10px;
+  color: var(--text-muted);
+  margin-left: 8px;
+}
+
+.tab-divider {
+  width: 1px;
+  height: 20px;
+  background: var(--border-color);
+  flex-shrink: 0;
+  align-self: center;
+  margin: 0 4px;
+}
+
 .tab-bar {
   display: flex;
   gap: 0;

src/stores/connection.ts

@@ -36,16 +36,23 @@ export interface ConnectionConfig {
 export const useConnectionStore = defineStore('connection', () => {
   const connections = ref<ConnectionConfig[]>([])
   const activeId = ref<string | null>(null)
+  const connectedIds = ref<string[]>([])
   const connecting = ref(false)
   const error = ref<string | null>(null)
-  const serverInfo = ref<string | null>(null)
-  const healthOk = ref(true)
-  let healthTimer: ReturnType<typeof setInterval> | null = null
+  const serverInfoMap = ref<Record<string, string>>({})
+  const healthMap = ref<Record<string, boolean>>({})
+  const healthTimers = new Map<string, ReturnType<typeof setInterval>>()
 
   const activeConnection = computed(() =>
     connections.value.find((c: ConnectionConfig) => c.id === activeId.value) ?? null
   )
-  const isConnected = computed(() => activeId.value !== null)
+  const isConnected = computed(() => activeId.value !== null && connectedIds.value.includes(activeId.value))
+  const serverInfo = computed(() => activeId.value ? serverInfoMap.value[activeId.value] ?? null : null)
+  const healthOk = computed(() => activeId.value ? healthMap.value[activeId.value] ?? false : false)
+
+  function isConnectedById(id: string): boolean {
+    return connectedIds.value.includes(id)
+  }
 
   async function loadConnections() {
     connections.value = await window.electronAPI.storage.getConnections()
@@ -66,7 +73,7 @@ export const useConnectionStore = defineStore('connection', () => {
   }
 
   async function deleteConnection(id: string) {
-    if (activeId.value === id) await disconnect()
+    if (connectedIds.value.includes(id)) await disconnectById(id)
     connections.value = await window.electronAPI.storage.deleteConnection(id)
   }
 
@@ -75,6 +82,11 @@ export const useConnectionStore = defineStore('connection', () => {
   }
 
   async function connect(conn: ConnectionConfig) {
+    // If already connected, just switch
+    if (connectedIds.value.includes(conn.id)) {
+      activeId.value = conn.id
+      return
+    }
     connecting.value = true
     error.value = null
     try {
@@ -107,8 +119,9 @@ export const useConnectionStore = defineStore('connection', () => {
         sshPassphrase: conn.sshPassphrase,
       })
       if (result.success) {
+        connectedIds.value.push(conn.id)
         activeId.value = conn.id
-        serverInfo.value = await window.electronAPI.redis.getInfo(conn.id)
+        serverInfoMap.value[conn.id] = await window.electronAPI.redis.getInfo(conn.id)
         startHealthCheck(conn.id)
       } else {
         error.value = result.error || 'Connection failed'
@@ -120,12 +133,26 @@ export const useConnectionStore = defineStore('connection', () => {
     }
   }
 
+  function switchTo(id: string) {
+    if (connectedIds.value.includes(id)) {
+      activeId.value = id
+    }
+  }
+
+  async function disconnectById(id: string) {
+    stopHealthCheck(id)
+    await window.electronAPI.redis.disconnect(id)
+    connectedIds.value = connectedIds.value.filter(i => i !== id)
+    delete serverInfoMap.value[id]
+    delete healthMap.value[id]
+    if (activeId.value === id) {
+      activeId.value = connectedIds.value[0] ?? null
+    }
+  }
+
   async function disconnect() {
-    stopHealthCheck()
     if (activeId.value) {
-      await window.electronAPI.redis.disconnect(activeId.value)
-      activeId.value = null
-      serverInfo.value = null
+      await disconnectById(activeId.value)
     }
   }
 
@@ -133,7 +160,7 @@ export const useConnectionStore = defineStore('connection', () => {
     if (!activeId.value) return ''
     try {
       const info = await window.electronAPI.redis.getInfo(activeId.value)
-      serverInfo.value = info
+      serverInfoMap.value[activeId.value] = info
       return info
     } catch {
       return ''
@@ -141,26 +168,34 @@ export const useConnectionStore = defineStore('connection', () => {
   }
 
   function startHealthCheck(connId: string) {
-    stopHealthCheck()
-    healthOk.value = true
-    healthTimer = setInterval(async () => {
+    stopHealthCheck(connId)
+    healthMap.value[connId] = true
+    const timer = setInterval(async () => {
       try {
         const ok = await window.electronAPI.redis.isConnected(connId)
-        healthOk.value = ok
+        healthMap.value[connId] = ok
         if (!ok && activeId.value === connId) {
-          // Connection lost
           error.value = 'Connection lost'
         }
       } catch {
-        healthOk.value = false
+        healthMap.value[connId] = false
       }
     }, 5000)
+    healthTimers.set(connId, timer)
   }
 
-  function stopHealthCheck() {
-    if (healthTimer) {
-      clearInterval(healthTimer)
-      healthTimer = null
+  function stopHealthCheck(connId?: string) {
+    if (connId) {
+      const timer = healthTimers.get(connId)
+      if (timer) {
+        clearInterval(timer)
+        healthTimers.delete(connId)
+      }
+    } else {
+      for (const [, timer] of healthTimers) {
+        clearInterval(timer)
+      }
+      healthTimers.clear()
     }
   }
 
@@ -238,9 +273,9 @@ export const useConnectionStore = defineStore('connection', () => {
   }
 
   return {
-    connections, activeId, connecting, error, serverInfo, healthOk,
+    connections, activeId, connectedIds, connecting, error, serverInfo, healthOk,
     activeConnection, isConnected,
     loadConnections, decryptPassword, getInfo, saveConnection, deleteConnection, reorderConnections,
-    connect, disconnect, testConnection, exportConnections, importConnections,
+    connect, disconnect, disconnectById, switchTo, isConnectedById, testConnection, exportConnections, importConnections,
   }
 })