diff --git a/packages/frontend/src/components/PaneTitleBar.vue b/packages/frontend/src/components/PaneTitleBar.vue
new file mode 100644
index 0000000..b37f5a6
--- /dev/null
+++ b/packages/frontend/src/components/PaneTitleBar.vue
@@ -0,0 +1,73 @@
+<script setup lang="ts">
+import { PropType } from 'vue';
+import { useLayoutStore, type PaneName } from '../stores/layout.store';
+
+// --- Props ---
+const props = defineProps({
+  title: {
+    type: String,
+    required: true,
+  },
+  paneName: {
+    type: String as PropType<PaneName>,
+    required: true,
+  },
+});
+
+// --- Setup ---
+const layoutStore = useLayoutStore();
+
+// --- Methods ---
+const closePane = () => {
+  console.log(`[PaneTitleBar] Requesting to close pane: ${props.paneName}`);
+  layoutStore.setPaneVisibility(props.paneName, false);
+};
+</script>
+
+<template>
+  <div class="pane-title-bar">
+    <span class="title">{{ title }}</span>
+    <button class="close-button" @click="closePane" :title="`关闭 ${title}`">
+      &times; <!-- 使用 HTML 实体 '×' -->
+    </button>
+  </div>
+</template>
+
+<style scoped>
+.pane-title-bar {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 4px 8px; /* 调整内边距使标题栏更紧凑 */
+  background-color: #e9ecef; /* 标题栏背景色，可以根据主题调整 */
+  border-bottom: 1px solid #ced4da; /* 底部边框 */
+  height: 28px; /* 固定标题栏高度 */
+  box-sizing: border-box;
+  flex-shrink: 0; /* 防止标题栏被压缩 */
+}
+
+.title {
+  font-size: 0.85em; /* 稍小字体 */
+  font-weight: 600;
+  color: #495057; /* 标题颜色 */
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.close-button {
+  background: none;
+  border: none;
+  color: #6c757d; /* 关闭按钮颜色 */
+  cursor: pointer;
+  font-size: 1.2em; /* 稍大图标 */
+  line-height: 1;
+  padding: 0 4px; /* 微调内边距 */
+  border-radius: 3px;
+}
+
+.close-button:hover {
+  background-color: #dc3545; /* 悬停时背景变红 */
+  color: white; /* 悬停时图标变白 */
+}
+</style>
diff --git a/packages/frontend/src/components/Terminal.vue b/packages/frontend/src/components/Terminal.vue
index 715b415..e833764 100644
--- a/packages/frontend/src/components/Terminal.vue
+++ b/packages/frontend/src/components/Terminal.vue
@@ -205,11 +205,11 @@ defineExpose({ write });
   overflow: hidden; /* 防止滚动条出现 */
 }
 
-/* 尝试直接给 screen 添加 padding */
+/* 终端屏幕样式 - 移除上下间距 */
 .terminal-container :deep(.xterm-screen) {
-  padding: 10px; /* 为终端内容区域添加内边距 */
-  box-sizing: border-box; /* 确保 padding 包含在尺寸内 */
-  /* 覆盖 xterm.css 可能设置的 position: absolute，以便 padding 生效 */
+  padding: 0; /* 移除内边距，解决上下有间距的问题 */
+  box-sizing: border-box;
+  /* 覆盖 xterm.css 可能设置的 position: absolute */
   position: relative !important;
   width: 100% !important;
   height: 100% !important;
diff --git a/packages/frontend/src/components/TerminalTabBar.vue b/packages/frontend/src/components/TerminalTabBar.vue
index 374ed89..a386c4e 100644
--- a/packages/frontend/src/components/TerminalTabBar.vue
+++ b/packages/frontend/src/components/TerminalTabBar.vue
@@ -1,10 +1,18 @@
 <script setup lang="ts">
-import { ref, PropType } from 'vue'; // 导入 ref
+import { ref, computed, PropType } from 'vue'; // 导入 ref 和 computed
+import { useI18n } from 'vue-i18n'; // 导入 i18n
+import { storeToRefs } from 'pinia'; // 导入 storeToRefs
 import WorkspaceConnectionListComponent from './WorkspaceConnectionList.vue'; // 导入连接列表组件
 import { useSessionStore } from '../stores/session.store'; // 导入 session store
+import { useLayoutStore, type PaneName } from '../stores/layout.store'; // 导入布局 store 和类型
 // 导入会话状态类型
 import type { SessionTabInfoWithStatus } from '../stores/session.store'; // 导入更新后的类型
 
+// --- Setup ---
+const { t } = useI18n(); // 初始化 i18n
+const layoutStore = useLayoutStore(); // 初始化布局 store
+const { paneVisibility } = storeToRefs(layoutStore); // 修正：使用 storeToRefs 获取响应式状态
+
 // 定义 Props
 const props = defineProps({
   sessions: {
@@ -31,9 +39,10 @@ const closeSession = (event: MouseEvent, sessionId: string) => {
   emit('close-session', sessionId);
 };
 
-// --- 新增：弹出窗口状态和处理 ---
-const sessionStore = useSessionStore();
-const showConnectionListPopup = ref(false);
+// --- 本地状态 ---
+const sessionStore = useSessionStore(); // Session store 保持不变
+const showConnectionListPopup = ref(false); // 连接列表弹出状态
+const showLayoutMenu = ref(false); // 新增：布局菜单弹出状态
 
 const togglePopup = () => {
   showConnectionListPopup.value = !showConnectionListPopup.value;
@@ -46,13 +55,42 @@ const handlePopupConnect = (connectionId: number) => {
   sessionStore.handleConnectRequest(connectionId);
   showConnectionListPopup.value = false; // 关闭弹出窗口
 };
+
+// --- 新增：布局菜单处理 ---
+const toggleLayoutMenu = () => {
+  console.log('Toggling layout menu visibility. Current state:', showLayoutMenu.value); // 添加日志
+  showLayoutMenu.value = !showLayoutMenu.value;
+  console.log('New state:', showLayoutMenu.value); // 添加日志
+};
+
+// 定义面板名称到显示文本的映射 (恢复 commandBar)
+const paneLabels: Record<PaneName, string> = {
+  connections: t('layout.pane.connections'),
+  terminal: t('layout.pane.terminal'),
+  commandBar: t('layout.pane.commandBar'), // 恢复
+  fileManager: t('layout.pane.fileManager'),
+  editor: t('layout.pane.editor'),
+  statusMonitor: t('layout.pane.statusMonitor'),
+};
+
+// 获取所有可控制的面板名称
+const availablePanes = computed(() => Object.keys(paneVisibility.value) as PaneName[]); // 修正：使用 .value
+
+// 处理菜单项点击
+const handleTogglePane = (paneName: PaneName) => {
+  layoutStore.togglePaneVisibility(paneName);
+  // 可以选择点击后关闭菜单，或者保持打开
+  // showLayoutMenu.value = false;
+};
+
 </script>
 
 <template>
   <div class="terminal-tab-bar">
-    <ul class="tab-list">
-      <li
-        v-for="session in sessions"
+    <div class="tabs-and-add-button"> <!-- 新容器包裹标签和+按钮 -->
+      <ul class="tab-list">
+        <li
+          v-for="session in sessions"
         :key="session.sessionId"
         :class="['tab-item', { active: session.sessionId === activeSessionId }]"
         @click="activateSession(session.sessionId)"
@@ -64,14 +102,30 @@ const handlePopupConnect = (connectionId: number) => {
         <button class="close-tab-button" @click="closeSession($event, session.sessionId)" title="关闭标签页">
           &times; <!-- 使用 HTML 实体 '×' -->
         </button>
-      </li>
-    </ul>
-    <!-- 新增 "+" 按钮 -->
-    <button class="add-tab-button" @click="togglePopup" title="新建连接标签页">
-      <i class="fas fa-plus"></i>
-    </button>
-
-    <!-- 新增：连接列表弹出窗口 -->
+        </li>
+      </ul>
+      <!-- "+" 按钮紧随标签列表 -->
+      <button class="add-tab-button" @click="togglePopup" title="新建连接标签页">
+        <i class="fas fa-plus"></i>
+      </button>
+    </div>
+    <!-- 布局菜单按钮容器（推到最右侧） -->
+    <div class="layout-menu-container">
+      <button class="layout-menu-button" @click="toggleLayoutMenu" title="调整布局">
+        <i class="fas fa-bars"></i> <!-- 使用 Font Awesome bars 图标 -->
+      </button>
+      <!-- 布局菜单下拉列表 (保持不变) -->
+        <div v-if="showLayoutMenu" class="layout-menu-dropdown">
+          <ul>
+            <li v-for="pane in availablePanes" :key="pane" @click="handleTogglePane(pane)">
+              <span class="checkmark">{{ paneVisibility[pane] ? '✓' : '' }}</span>
+              {{ paneLabels[pane] || pane }}
+            </li>
+          </ul>
+        </div>
+      </div>
+    <!-- 移除多余的结束标签 -->
+    <!-- 连接列表弹出窗口 (保持不变) -->
     <div v-if="showConnectionListPopup" class="connection-list-popup" @click.self="togglePopup">
       <div class="popup-content">
         <button class="popup-close-button" @click="togglePopup">&times;</button>
@@ -91,12 +145,23 @@ const handlePopupConnect = (connectionId: number) => {
   display: flex;
   background-color: #e0e0e0; /* 标签栏背景色 */
   border-bottom: 1px solid #bdbdbd;
-  overflow-x: auto; /* 如果标签过多则允许水平滚动 */
   white-space: nowrap;
-  /* padding: 0 0.5rem; */ /* 移除左右内边距，让标签列表和按钮自己控制 */
-  padding-right: 0.5rem; /* 只保留右侧内边距给按钮 */
   height: 2.5rem; /* 固定标签栏高度 */
   box-sizing: border-box; /* 确保 padding 不会增加总高度 */
+  /* justify-content: space-between; */ /* 移除，让内容自然靠左 */
+  overflow: hidden; /* 恢复：防止标签过多时破坏布局 */
+}
+
+/* 包裹标签和+按钮的容器 */
+.tabs-and-add-button {
+  display: flex;
+  align-items: center;
+  overflow-x: auto; /* 允许标签和+按钮区域滚动 */
+  /* flex-grow: 1; */ /* 移除：让其自然宽度 */
+  /* max-width: calc(100% - 50px); */ /* 移除宽度限制 */
+  flex-shrink: 1; /* 允许在空间不足时收缩 */
+  min-width: 0; /* 允许收缩到0 */
+  height: 100%; /* 确保高度与父元素相同，消除上下间距 */
 }
 
 /* 状态点样式 */
@@ -117,9 +182,11 @@ const handlePopupConnect = (connectionId: number) => {
 
 .tab-list {
   list-style: none;
-  padding: 0; /* 确保列表无内边距 */
-  margin: 0; /* 确保列表无外边距 */
+  padding: 0;
+  margin: 0;
   display: flex;
+  flex-shrink: 0; /* 防止标签列表被压缩 */
+  height: 100%; /* 确保占满整个高度 */
 }
 
 .tab-item {
@@ -133,7 +200,7 @@ const handlePopupConnect = (connectionId: number) => {
   background-color: #f0f0f0; /* 未激活标签背景 */
   color: #616161; /* 未激活标签文字颜色 */
   transition: background-color 0.2s ease, color 0.2s ease;
-  max-width: 200px; /* 限制标签最大宽度 */
+  /* max-width: 200px; */ /* 移除最大宽度限制 */
   position: relative; /* 保持相对定位，以防万一需要定位子元素 */
 }
 
@@ -153,10 +220,11 @@ const handlePopupConnect = (connectionId: number) => {
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
-  /* margin-right: 1.5rem; */ /* 调整右边距，因为关闭按钮现在是 flex item */
+  /* margin-right: 1.5rem; */ /* 移除 */
   line-height: normal; /* 默认行高 */
-  flex-grow: 1; /* 允许名称伸展 */
+  flex-grow: 1; /* 保持：允许名称伸展 */
   margin-left: 4px; /* 在状态点和名称之间添加一点间距 */
+  text-align: left; /* 保持文本左对齐 */
 }
 
 .close-tab-button {
@@ -169,9 +237,9 @@ const handlePopupConnect = (connectionId: number) => {
   padding: 0 0.3rem;
   line-height: 1;
   border-radius: 50%;
-  margin-left: auto; /* 推到右侧 */
+  margin-left: auto; /* 保持 auto 将按钮推到最右侧 */
+  flex-shrink: 0; /* 防止按钮被压缩 */
   /* 移除绝对定位 */
-  /* position: absolute; */
   /* top: 50%; */
   /* right: 0.5rem; */
   /* transform: translateY(-50%); */
@@ -194,9 +262,8 @@ const handlePopupConnect = (connectionId: number) => {
 .add-tab-button {
   background: none;
   border: none;
-  border-left: 1px solid #bdbdbd; /* 左侧分隔线 */
+  border-left: 1px solid #bdbdbd; /* 恢复左侧分隔线 */
   padding: 0 0.8rem;
-  /* margin-left: 0.5rem; */ /* 移除左外边距 */
   cursor: pointer;
   font-size: 1.1em;
   color: #616161;
@@ -213,6 +280,8 @@ const handlePopupConnect = (connectionId: number) => {
   line-height: 1; /* 确保图标垂直居中 */
 }
 
+/* 移除 action-buttons-container 样式 */
+
 /* 弹出窗口样式 */
 .connection-list-popup {
   position: fixed; /* 固定定位，覆盖整个屏幕 */
@@ -277,4 +346,77 @@ const handlePopupConnect = (connectionId: number) => {
   padding: 0; /* 保持移除内边距 */
 }
 
+/* 新增：布局菜单样式 */
+.layout-menu-container {
+  position: relative; /* 用于定位下拉菜单 */
+  display: flex; /* 确保按钮垂直居中 */
+  align-items: center;
+  height: 100%;
+  margin-left: auto; /* 保持：将布局按钮推到最右侧 */
+  border-left: 1px solid #bdbdbd; /* 确保布局按钮左侧有分隔线 */
+  flex-shrink: 0; /* 保持：防止被压缩 */
+}
+
+.layout-menu-button {
+  background: none;
+  border: none;
+  /* border-left: 1px solid #bdbdbd; */ /* 移除按钮左侧分隔线 */
+  padding: 0 0.8rem;
+  cursor: pointer;
+  font-size: 1.1em;
+  color: #616161;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  flex-shrink: 0;
+}
+.layout-menu-button:hover {
+  background-color: #d0d0d0;
+}
+.layout-menu-button i {
+  line-height: 1;
+}
+
+.layout-menu-dropdown {
+  position: absolute; /* 恢复绝对定位 */
+  top: 100%; /* 定位在按钮下方 */
+  right: 0; /* 对齐到右侧 */
+  background-color: lightblue; /* 临时调试背景色 */
+  min-height: 20px; /* 临时调试最小高度 */
+  border: 1px solid #ccc;
+  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
+  z-index: 9999; /* 保持高 z-index */
+  min-width: 150px; /* 最小宽度 */
+  padding: 5px 0;
+  border-radius: 4px;
+}
+
+.layout-menu-dropdown ul {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+}
+
+.layout-menu-dropdown li {
+  padding: 8px 15px;
+  cursor: pointer;
+  white-space: nowrap;
+  display: flex;
+  align-items: center;
+}
+
+.layout-menu-dropdown li:hover {
+  background-color: #f0f0f0;
+}
+
+.layout-menu-dropdown .checkmark {
+  display: inline-block;
+  width: 20px; /* 固定宽度以便对齐 */
+  text-align: center;
+  margin-right: 5px;
+  font-weight: bold;
+  color: #28a745; /* 勾选标记颜色 */
+}
+
 </style>
diff --git a/packages/frontend/src/locales/en.json b/packages/frontend/src/locales/en.json
index 87eee51..785d521 100644
--- a/packages/frontend/src/locales/en.json
+++ b/packages/frontend/src/locales/en.json
@@ -545,5 +545,15 @@
   },
   "commandInputBar": {
   "placeholder": "Enter command and press Enter to send..."
+},
+"layout": {
+  "pane": {
+    "connections": "Connections",
+    "terminal": "Terminal",
+    "commandBar": "Command Bar",
+    "fileManager": "File Manager",
+    "editor": "Editor",
+    "statusMonitor": "Status Monitor"
+  }
 }
 }
diff --git a/packages/frontend/src/locales/zh.json b/packages/frontend/src/locales/zh.json
index 475542b..62b4c91 100644
--- a/packages/frontend/src/locales/zh.json
+++ b/packages/frontend/src/locales/zh.json
@@ -548,5 +548,15 @@
   },
   "commandInputBar": {
   "placeholder": "在此输入命令后按 Enter 发送到终端..."
+},
+"layout": {
+  "pane": {
+    "connections": "连接列表",
+    "terminal": "终端",
+    "commandBar": "命令栏",
+    "fileManager": "文件管理器",
+    "editor": "编辑器",
+    "statusMonitor": "状态监视器"
+  }
 }
 }
diff --git a/packages/frontend/src/stores/layout.store.ts b/packages/frontend/src/stores/layout.store.ts
new file mode 100644
index 0000000..df9f740
--- /dev/null
+++ b/packages/frontend/src/stores/layout.store.ts
@@ -0,0 +1,44 @@
+import { defineStore } from 'pinia';
+import { ref } from 'vue';
+
+// 定义面板名称的类型，方便管理和引用 (恢复 commandBar)
+export type PaneName = 'connections' | 'terminal' | 'commandBar' | 'fileManager' | 'editor' | 'statusMonitor';
+
+// 定义 Store
+export const useLayoutStore = defineStore('layout', () => {
+  // 使用 ref 创建响应式状态，存储每个面板的可见性 (恢复 commandBar)
+  const paneVisibility = ref<Record<PaneName, boolean>>({
+    connections: true,
+    terminal: true,
+    commandBar: true, // 恢复
+    fileManager: true,
+    editor: true,
+    statusMonitor: true,
+  });
+
+  // Action: 切换指定面板的可见性
+  function togglePaneVisibility(paneName: PaneName) {
+    if (paneVisibility.value[paneName] !== undefined) {
+      paneVisibility.value[paneName] = !paneVisibility.value[paneName];
+      console.log(`[Layout Store] Toggled visibility for ${paneName}: ${paneVisibility.value[paneName]}`);
+    } else {
+      console.warn(`[Layout Store] Attempted to toggle visibility for unknown pane: ${paneName}`);
+    }
+  }
+
+  // Action: 设置指定面板的可见性
+  function setPaneVisibility(paneName: PaneName, isVisible: boolean) {
+    if (paneVisibility.value[paneName] !== undefined) {
+      paneVisibility.value[paneName] = isVisible;
+      console.log(`[Layout Store] Set visibility for ${paneName} to: ${isVisible}`);
+    } else {
+      console.warn(`[Layout Store] Attempted to set visibility for unknown pane: ${paneName}`);
+    }
+  }
+
+  return {
+    paneVisibility,
+    togglePaneVisibility,
+    setPaneVisibility,
+  };
+});
diff --git a/packages/frontend/src/views/WorkspaceView.vue b/packages/frontend/src/views/WorkspaceView.vue
index 8ecd42a..74dfb47 100644
--- a/packages/frontend/src/views/WorkspaceView.vue
+++ b/packages/frontend/src/views/WorkspaceView.vue
@@ -10,9 +10,11 @@ import AddConnectionFormComponent from '../components/AddConnectionForm.vue';
 import TerminalTabBar from '../components/TerminalTabBar.vue';
 import CommandInputBar from '../components/CommandInputBar.vue';
 import FileEditorContainer from '../components/FileEditorContainer.vue'; // 导入编辑器容器
+import PaneTitleBar from '../components/PaneTitleBar.vue'; // 导入标题栏组件
 import { useSessionStore, type SessionTabInfoWithStatus, type SshTerminalInstance } from '../stores/session.store'; // 导入 SshTerminalInstance
 import { useSettingsStore } from '../stores/settings.store'; // 导入设置 Store
 import { useFileEditorStore } from '../stores/fileEditor.store'; // 导入文件编辑器 Store
+import { useLayoutStore } from '../stores/layout.store'; // 导入布局 Store
 import type { ConnectionInfo } from '../stores/connections.store';
 // 导入 splitpanes 组件
 import { Splitpanes, Pane } from 'splitpanes';
@@ -24,11 +26,13 @@ const { t } = useI18n();
 const sessionStore = useSessionStore();
 const settingsStore = useSettingsStore(); // 初始化设置 Store
 const fileEditorStore = useFileEditorStore(); // 初始化文件编辑器 Store (用于共享模式)
+const layoutStore = useLayoutStore(); // 初始化布局 Store
 
 // --- 从 Store 获取响应式状态和 Getters ---
 const { sessionTabsWithStatus, activeSessionId, activeSession } = storeToRefs(sessionStore);
 const { shareFileEditorTabsBoolean } = storeToRefs(settingsStore); // 获取共享设置
 const { orderedTabs: globalEditorTabs, activeTabId: globalActiveEditorTabId } = storeToRefs(fileEditorStore); // 获取全局编辑器状态
+const { paneVisibility } = storeToRefs(layoutStore); // 获取布局可见性状态
 
 // --- 计算属性 (用于动态绑定编辑器 Props) ---
 // **再次修正：** 确保计算属性在共享模式下严格只依赖全局状态
@@ -185,8 +189,10 @@ onBeforeUnmount(() => {
       <splitpanes class="default-theme" :horizontal="false" style="height: 100%">
 
         <!-- 1. 左侧边栏 Pane (连接列表) -->
-        <pane size="15" min-size="10" class="sidebar-pane"> <!-- 调整大小 -->
+        <pane v-if="paneVisibility.connections" size="15" min-size="10" class="sidebar-pane pane-with-title"> <!-- 使用 v-if 控制, 添加 class -->
+          <PaneTitleBar :title="t('layout.pane.connections')" pane-name="connections" />
           <WorkspaceConnectionListComponent
+            class="pane-content"
             @connect-request="(id) => { console.log(`[WorkspaceView] Received 'connect-request' event for ID: ${id}`); sessionStore.handleConnectRequest(id); }"
             @open-new-session="(id) => { console.log(`[WorkspaceView] Received 'open-new-session' event for ID: ${id}`); sessionStore.handleOpenNewSession(id); }"
             @request-add-connection="() => { console.log('[WorkspaceView] Received \'request-add-connection\' event'); handleRequestAddConnection(); }"
@@ -194,15 +200,17 @@ onBeforeUnmount(() => {
           />
         </pane>
 
-        <!-- 2. 中间区域 Pane (终端/命令栏/文件管理器) -->
-        <pane size="50" min-size="30" class="middle-pane"> <!-- 调整大小 -->
+        <!-- 2. 中间区域 Pane (终端/命令栏/文件管理器) - 这个 Pane 本身通常保持可见，内部 Pane 才切换 -->
+        <pane size="50" min-size="30" class="middle-pane">
            <!-- 上下分割 (终端 | 命令栏 | 文件管理器) -->
            <splitpanes :horizontal="true" style="height: 100%" :dbl-click-splitter="false">
               <!-- 上方 Pane (终端) -->
-              <pane size="55" min-size="20" class="terminal-pane"> <!-- 调整大小 -->
-                 <div
-                   v-for="tabInfo in sessionTabsWithStatus"
-                   :key="tabInfo.sessionId"
+              <pane v-if="paneVisibility.terminal" size="55" min-size="20" class="terminal-pane pane-with-title"> <!-- 使用 v-if 控制, 添加 class -->
+                 <PaneTitleBar :title="t('layout.pane.terminal')" pane-name="terminal" />
+                 <div class="pane-content terminal-content-wrapper"> <!-- 添加包裹 div -->
+                   <div
+                     v-for="tabInfo in sessionTabsWithStatus"
+                     :key="tabInfo.sessionId"
                    v-show="tabInfo.sessionId === activeSessionId"
                    class="terminal-session-wrapper"
                  >
@@ -214,26 +222,32 @@ onBeforeUnmount(() => {
                       @data="sessionStore.sessions.get(tabInfo.sessionId)?.terminalManager.handleTerminalData"
                       @resize="(dims) => { console.log(`[工作区视图 ${tabInfo.sessionId}] 收到 resize 事件:`, dims); sessionStore.sessions.get(tabInfo.sessionId)?.terminalManager.handleTerminalResize(dims); }"
                    />
-                 </div>
-                 <div v-if="!activeSessionId" class="terminal-placeholder">
-                   <h2>{{ t('workspace.selectConnectionPrompt') }}</h2>
-                   <p>{{ t('workspace.selectConnectionHint') }}</p>
+                   </div>
+                   <div v-if="!activeSessionId" class="terminal-placeholder">
+                     <h2>{{ t('workspace.selectConnectionPrompt') }}</h2>
+                     <p>{{ t('workspace.selectConnectionHint') }}</p>
+                   </div>
                  </div>
               </pane> <!-- End Terminal Pane -->
 
-              <!-- 中间 Pane (命令栏) -->
-              <pane size="5" min-size="5" class="command-bar-pane">
+              <!-- 中间 Pane (命令栏) - 移除标题栏，但保留 v-if -->
+              <pane v-if="paneVisibility.commandBar" size="5" min-size="5" class="command-bar-pane">
                  <CommandInputBar
                    v-if="activeSessionId"
                    @send-command="handleSendCommand"
                  />
               </pane> <!-- End Command Bar Pane -->
 
-              <!-- 下方 Pane (文件管理器) -->
-              <pane size="40" min-size="15" class="file-manager-pane"> <!-- 调整大小 -->
-                 <div
-                   v-for="tabInfo in sessionTabsWithStatus"
-                   :key="tabInfo.sessionId + '-fm-wrapper'"
+              <!-- 下方 Pane (文件管理器区域 - 包含新的水平分割) -->
+              <pane v-if="paneVisibility.fileManager" size="40" min-size="15" class="file-manager-area-pane pane-with-title"> <!-- 使用 v-if 控制, 添加 class -->
+                <PaneTitleBar :title="t('layout.pane.fileManager')" pane-name="fileManager" />
+                <!-- 新增：内部水平分割，允许未来添加列 -->
+                <splitpanes :horizontal="false" style="height: 100%" :dbl-click-splitter="false" class="pane-content"> <!-- 添加 class -->
+                  <!-- 初始的文件管理器 Pane -->
+                  <pane class="file-manager-pane"> <!-- 这个内部 pane 不需要 title bar -->
+                    <div
+                      v-for="tabInfo in sessionTabsWithStatus"
+                      :key="tabInfo.sessionId + '-fm-wrapper'"
                    v-show="tabInfo.sessionId === activeSessionId"
                    class="file-manager-wrapper"
                  >
@@ -250,15 +264,20 @@ onBeforeUnmount(() => {
                        isSftpReady: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.isSftpReady
                      }"
                    />
-                 </div>
-                 <div v-if="!activeSessionId" class="pane-placeholder">{{ t('fileManager.noActiveSession') }}</div>
-              </pane> <!-- End File Manager Pane -->
-           </splitpanes> <!-- End Middle Area Splitpanes -->
+                    </div>
+                    <div v-if="!activeSessionId" class="pane-placeholder">{{ t('fileManager.noActiveSession') }}</div>
+                  </pane> <!-- End Inner File Manager Pane -->
+                  <!-- 这里可以将来添加其他 Pane -->
+                </splitpanes> <!-- End Inner Horizontal Splitpanes -->
+              </pane> <!-- End File Manager Area Pane -->
+           </splitpanes> <!-- End Middle Area Vertical Splitpanes -->
         </pane> <!-- End Middle Pane -->
 
         <!-- 3. 右侧区域 1 Pane (文件编辑器) -->
-        <pane size="20" min-size="15" class="file-editor-pane"> <!-- 新增编辑器窗格 -->
+        <pane v-if="paneVisibility.editor" size="20" min-size="15" class="file-editor-pane pane-with-title"> <!-- 使用 v-if 控制, 添加 class -->
+           <PaneTitleBar :title="t('layout.pane.editor')" pane-name="editor" />
            <FileEditorContainer
+             class="pane-content"
              :tabs="editorTabs"
              :active-tab-id="activeEditorTabId"
              :session-id="activeSessionId" 
@@ -270,10 +289,12 @@ onBeforeUnmount(() => {
         </pane>
 
         <!-- 4. 右侧区域 2 Pane (状态监视器) -->
-        <pane size="15" min-size="10" class="sidebar-pane status-monitor-pane"> <!-- 调整大小 -->
-           <div
-             v-for="tabInfo in sessionTabsWithStatus"
-             :key="tabInfo.sessionId + '-sm-wrapper'"
+        <pane v-if="paneVisibility.statusMonitor" size="15" min-size="10" class="sidebar-pane status-monitor-pane pane-with-title"> <!-- 使用 v-if 控制, 添加 class -->
+           <PaneTitleBar :title="t('layout.pane.statusMonitor')" pane-name="statusMonitor" />
+           <div class="pane-content status-monitor-content-wrapper"> <!-- 添加包裹 div -->
+             <div
+               v-for="tabInfo in sessionTabsWithStatus"
+               :key="tabInfo.sessionId + '-sm-wrapper'"
              v-show="tabInfo.sessionId === activeSessionId"
              class="status-monitor-wrapper"
            >
@@ -284,8 +305,9 @@ onBeforeUnmount(() => {
                :server-status="sessionStore.sessions.get(tabInfo.sessionId)!.statusMonitorManager.serverStatus.value"
                :status-error="sessionStore.sessions.get(tabInfo.sessionId)!.statusMonitorManager.statusError.value"
              />
+             </div>
+             <div v-if="!activeSessionId" class="pane-placeholder">{{ t('statusMonitor.noActiveSession') }}</div>
            </div>
-           <div v-if="!activeSessionId" class="pane-placeholder">{{ t('statusMonitor.noActiveSession') }}</div>
         </pane>
 
       </splitpanes>
@@ -320,57 +342,102 @@ onBeforeUnmount(() => {
 }
 
 /* 为 Pane 添加一些基本样式 */
+.pane-with-title { /* 给包含标题栏的 Pane 添加基础样式 */
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+.pane-content { /* 让内容区域填充剩余空间 */
+  flex-grow: 1;
+  overflow: auto; /* 或者 hidden，根据需要 */
+  display: flex; /* 内部可能还需要 flex 布局 */
+  flex-direction: column; /* 默认列方向 */
+}
+
 .sidebar-pane, /* 用于左右侧边栏 */
 .middle-pane, /* 中间包含终端、命令栏、文件管理器的 Pane */
 .terminal-pane,
 .command-bar-pane,
-.file-editor-pane, /* 新增编辑器窗格样式 */
-.file-manager-pane,
-.status-monitor-pane { /* 添加状态监视器样式 */
-  display: flex; /* 确保 Pane 内容可以正确布局 */
-  flex-direction: column;
-  overflow: hidden; /* Pane 内部内容溢出时隐藏 */
+.file-editor-pane, /* 编辑器窗格样式 */
+.file-manager-area-pane, /* 文件管理器区域 Pane */
+.file-manager-pane, /* 内部文件管理器 Pane */
+.status-monitor-pane { /* 状态监视器样式 */
+  /* display: flex; flex-direction: column; overflow: hidden; 已被 pane-with-title 或 pane-content 处理 */
   background-color: #f8f9fa; /* 默认背景色 */
 }
 .middle-pane {
     padding: 0; /* 移除 middle-pane 的内边距 */
 }
 
-/* 命令栏 Pane 特定样式 - 恢复基本样式 */
+/* 命令栏 Pane 特定样式 - 恢复原样 */
 .command-bar-pane {
   background-color: #e9ecef; /* 背景色 */
   justify-content: center; /* 垂直居中输入框 */
   overflow: hidden; /* 内容不应超出 */
+  display: flex; /* 确保 flex 布局 */
+  align-items: center; /* 垂直居中 */
 }
-/* 调整内部 CommandInputBar 样式 */
+/* 调整内部 CommandInputBar 样式 - 恢复原样 */
 .command-bar-pane > .command-input-bar {
-    border: none; /* 移除 CommandInputBar 的边框 */
-    background-color: transparent; /* 移除 CommandInputBar 的背景 */
-    min-height: auto; /* 移除最小高度 */
-    padding: 2px 10px; /* 调整内边距 */
+    border: none;
+    background-color: transparent;
+    min-height: auto;
+    padding: 2px 10px; /* 恢复内边距 */
+    flex-grow: 1; /* 让输入框填充 */
 }
 
 .terminal-pane {
-    background-color: #1e1e1e; /* 终端背景 */
-    position: relative; /* 保持相对定位用于占位符 */
+    background-color: #f8f9fa; /* 外层 pane 背景 */
+    /* position: relative; 由内部 wrapper 处理 */
+}
+.terminal-content-wrapper {
+    background-color: #1e1e1e; /* 终端实际背景 */
+    position: relative; /* 用于占位符 */
+    flex-grow: 1;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
 }
 .file-editor-pane {
-    background-color: #2d2d2d; /* 与编辑器容器背景一致 */
+    background-color: #f8f9fa; /* 外层 pane 背景 */
 }
-.file-manager-pane {
-    /* 分隔线由 splitpanes 提供 */
+/* FileEditorContainer 自身需要 flex-grow: 1 */
+.file-editor-pane > .pane-content {
+    background-color: #2d2d2d; /* 编辑器容器背景 */
+}
+
+.file-manager-area-pane {
+    padding: 0;
+    background-color: #f8f9fa; /* 外层 pane 背景 */
+}
+/* 内部的 splitpanes 需要 flex-grow: 1 */
+.file-manager-area-pane > .pane-content {
+    background-color: #f0f0f0; /* 内部区域背景 */
+}
+.file-manager-pane { /* 内部文件管理器 Pane */
     background-color: #ffffff; /* 文件管理器使用浅色背景 */
+    display: flex; /* 确保内部 flex 布局 */
+    flex-direction: column;
+    overflow: hidden;
 }
 .status-monitor-pane {
-    /* 状态监视器样式 */
-     text-align: center;
-     padding: 1rem;
+    background-color: #f8f9fa; /* 外层 pane 背景 */
+     /* text-align: center; 由内部 wrapper 处理 */
+     /* padding: 1rem; 由内部 wrapper 处理 */
+}
+.status-monitor-content-wrapper {
+    text-align: center;
+    padding: 1rem;
+    flex-grow: 1;
+    display: flex;
+    flex-direction: column;
+    overflow: auto; /* 允许内容滚动 */
 }
 
 
 /* 终端会话包装器 */
 .terminal-session-wrapper {
-    flex-grow: 1; /* 填充 terminal-pane */
+    flex-grow: 1;
     display: flex;
     flex-direction: column;
     overflow: hidden;
@@ -387,9 +454,9 @@ onBeforeUnmount(() => {
 /* 状态监视器包装器 (内部组件应填充) */
 .status-monitor-wrapper {
     flex: 1;
-    display: flex; /* 使内部 StatusMonitorComponent 可以填充 */
+    display: flex;
     flex-direction: column;
-    overflow: hidden;
+    overflow: hidden; /* 内部组件自己处理滚动 */
 }
 
 /* 终端占位符 */