diff --git a/package-lock.json b/package-lock.json
index b3a2616..055769f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -466,6 +466,15 @@
         "node": ">=12"
       }
     },
+    "node_modules/@fortawesome/fontawesome-free": {
+      "version": "6.7.2",
+      "resolved": "https://registry.npmjs.org/@fortawesome/fontawesome-free/-/fontawesome-free-6.7.2.tgz",
+      "integrity": "sha512-JUOtgFW6k9u4Y+xeIaEiLr3+cjoUPiAuLXoyKOJSia6Duzb7pq+A76P9ZdPDoAoxHdHzq6gE9/jKBGXlZT8FbA==",
+      "license": "(CC-BY-4.0 AND OFL-1.1 AND MIT)",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/@gar/promisify": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/@gar/promisify/-/promisify-1.1.3.tgz",
@@ -1014,6 +1023,42 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/splitpanes": {
+      "version": "2.2.6",
+      "resolved": "https://registry.npmjs.org/@types/splitpanes/-/splitpanes-2.2.6.tgz",
+      "integrity": "sha512-3dV5sO1Ht74iER4jJU03mreL3f+Q2h47ZqXS6Sfbqc6hkCvsDrX1GA0NbYWRdNvZemPyTDzUoApWKeoGbALwkQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "vue": "^2.0.0"
+      }
+    },
+    "node_modules/@types/splitpanes/node_modules/@vue/compiler-sfc": {
+      "version": "2.7.16",
+      "resolved": "https://registry.npmjs.org/@vue/compiler-sfc/-/compiler-sfc-2.7.16.tgz",
+      "integrity": "sha512-KWhJ9k5nXuNtygPU7+t1rX6baZeqOYLEforUPjgNDBnLicfHCoi48H87Q8XyLZOrNNsmhuwKqtpDQWjEFe6Ekg==",
+      "dev": true,
+      "dependencies": {
+        "@babel/parser": "^7.23.5",
+        "postcss": "^8.4.14",
+        "source-map": "^0.6.1"
+      },
+      "optionalDependencies": {
+        "prettier": "^1.18.2 || ^2.0.0"
+      }
+    },
+    "node_modules/@types/splitpanes/node_modules/vue": {
+      "version": "2.7.16",
+      "resolved": "https://registry.npmjs.org/vue/-/vue-2.7.16.tgz",
+      "integrity": "sha512-4gCtFXaAA3zYZdTp5s4Hl2sozuySsgz4jy1EnpBHNfpMa9dK1ZCG7viqBPCwXtmgc8nHqUsAu3G4gtmXkkY3Sw==",
+      "deprecated": "Vue 2 has reached EOL and is no longer actively maintained. See https://v2.vuejs.org/eol/ for more details.",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vue/compiler-sfc": "2.7.16",
+        "csstype": "^3.1.0"
+      }
+    },
     "node_modules/@types/sqlite3": {
       "version": "3.1.11",
       "resolved": "https://registry.npmjs.org/@types/sqlite3/-/sqlite3-3.1.11.tgz",
@@ -4434,6 +4479,23 @@
         "node": ">=10"
       }
     },
+    "node_modules/prettier": {
+      "version": "2.8.8",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.8.8.tgz",
+      "integrity": "sha512-tdN8qQGvNjw4CHbY+XXk0JgCXn9QiF21a55rBe5LJAU+kDyC4WQn4+awm2Xfk2lQMk5fKup9XgzTZtGkjBdP9Q==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "bin": {
+        "prettier": "bin-prettier.js"
+      },
+      "engines": {
+        "node": ">=10.13.0"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    },
     "node_modules/process-nextick-args": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
@@ -5144,6 +5206,18 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/splitpanes": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/splitpanes/-/splitpanes-4.0.3.tgz",
+      "integrity": "sha512-S/f1CoH2JroOib7kzQtTQNtQCa7VzNQ2qKOO5HNj/5EVVcNkfz1eX/sH+X3XKdBdDLihEKDekVGwrLADd2oirA==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/antoniandre"
+      },
+      "peerDependencies": {
+        "vue": "^3.2.0"
+      }
+    },
     "node_modules/sprintf-js": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.3.tgz",
@@ -6274,11 +6348,13 @@
       "name": "@nexus-terminal/frontend",
       "version": "0.1.0",
       "dependencies": {
+        "@fortawesome/fontawesome-free": "^6.7.2",
         "@simplewebauthn/browser": "^13.1.0",
         "axios": "^1.8.4",
         "monaco-editor": "^0.52.2",
         "pinia": "^3.0.2",
         "pinia-plugin-persistedstate": "^4.2.0",
+        "splitpanes": "^4.0.3",
         "vite-plugin-monaco-editor": "^1.1.0",
         "vue": "^3.3.0",
         "vue-i18n": "^9.14.4",
@@ -6288,6 +6364,7 @@
         "xterm-addon-web-links": "^0.9.0"
       },
       "devDependencies": {
+        "@types/splitpanes": "^2.2.6",
         "@vitejs/plugin-vue": "^4.2.0",
         "typescript": "^5.0.0",
         "vite": "^4.4.0",
diff --git a/packages/backend/src/services/status-monitor.service.ts b/packages/backend/src/services/status-monitor.service.ts
index 26e863c..81f58d9 100644
--- a/packages/backend/src/services/status-monitor.service.ts
+++ b/packages/backend/src/services/status-monitor.service.ts
@@ -55,13 +55,13 @@ export class StatusMonitorService {
         }
         if (state.statusIntervalId) {
             //console.warn(`[StatusMonitor] 会话 ${sessionId} 的状态轮询已在运行中。`);
-            return;
-        }
-        //console.warn(`[StatusMonitor] 为会话 ${sessionId} 启动状态轮询，间隔 ${interval}ms`);
-        this.fetchAndSendServerStatus(sessionId); // 立即执行一次
-        state.statusIntervalId = setInterval(() => {
-            this.fetchAndSendServerStatus(sessionId);
-        }, interval);
+             return;
+         }
+         //console.warn(`[StatusMonitor] 为会话 ${sessionId} 启动状态轮询，间隔 ${interval}ms`);
+         // 移除立即执行，让 setInterval 负责第一次调用，给连接更多准备时间
+         state.statusIntervalId = setInterval(() => {
+             this.fetchAndSendServerStatus(sessionId);
+         }, interval);
     }
 
     /**
@@ -118,11 +118,31 @@ export class StatusMonitorService {
                  status.osName = nameMatch ? nameMatch[1] : (osReleaseOutput.match(/^NAME="?([^"]+)"?/m)?.[1] ?? 'Unknown');
              } catch (err) { console.warn(`[StatusMonitor ${sessionId}] Failed to get OS name:`, err); }
 
-             // --- CPU Model ---
+             // --- CPU Model (Try /proc/cpuinfo first, fallback to lscpu) ---
              try {
-                 const lscpuOutput = await this.executeSshCommand(sshClient, "lscpu | grep 'Model name:'");
-                 status.cpuModel = lscpuOutput.match(/Model name:\s+(.*)/)?.[1].trim() ?? 'Unknown';
-             } catch (err) { console.warn(`[StatusMonitor ${sessionId}] Failed to get CPU model:`, err); }
+                 let cpuModelOutput = '';
+                 try {
+                     // Try /proc/cpuinfo first, common on many systems including Alpine
+                     cpuModelOutput = await this.executeSshCommand(sshClient, "cat /proc/cpuinfo | grep 'model name' | head -n 1");
+                     status.cpuModel = cpuModelOutput.match(/model name\s*:\s*(.*)/i)?.[1].trim();
+                 } catch (procErr) {
+                     console.warn(`[StatusMonitor ${sessionId}] Failed to get CPU model from /proc/cpuinfo, trying lscpu...`, procErr);
+                     // Fallback to lscpu if /proc/cpuinfo fails
+                     try {
+                         cpuModelOutput = await this.executeSshCommand(sshClient, "lscpu | grep 'Model name:'");
+                         status.cpuModel = cpuModelOutput.match(/Model name:\s+(.*)/)?.[1].trim();
+                     } catch (lscpuErr) {
+                         console.warn(`[StatusMonitor ${sessionId}] Failed to get CPU model from lscpu as well:`, lscpuErr);
+                     }
+                 }
+                 // If still no model found after both attempts
+                 if (!status.cpuModel) {
+                     status.cpuModel = 'Unknown';
+                 }
+             } catch (err) { // Catch any unexpected error during the process
+                 console.warn(`[StatusMonitor ${sessionId}] Error getting CPU model:`, err);
+                 status.cpuModel = 'Unknown';
+             }
 
              // --- Memory and Swap ---
              try {
@@ -154,16 +174,23 @@ export class StatusMonitorService {
                  } else { status.swapTotal = 0; status.swapUsed = 0; status.swapPercent = 0; }
              } catch (err) { console.warn(`[StatusMonitor ${sessionId}] Failed to get memory/swap usage:`, err); }
 
-             // --- Disk Usage (Root Partition) ---
+             // --- Disk Usage (Root Partition, POSIX format for compatibility) ---
              try {
-                 const dfOutput = await this.executeSshCommand(sshClient, "df -k / | tail -n 1");
-                 const parts = dfOutput.split(/\s+/);
-                 if (parts.length >= 5) {
-                     const total = parseInt(parts[1], 10); const used = parseInt(parts[2], 10);
-                     const percentMatch = parts[4].match(/(\d+)%/);
-                     if (!isNaN(total) && !isNaN(used) && percentMatch) {
-                         status.diskTotal = total; status.diskUsed = used;
-                         status.diskPercent = parseFloat(percentMatch[1]);
+                 // 使用 df -kP / 获取 POSIX 标准格式输出，更稳定
+                 const dfOutput = await this.executeSshCommand(sshClient, "df -kP /");
+                 const lines = dfOutput.split('\n');
+                 if (lines.length >= 2) {
+                     const parts = lines[1].split(/\s+/); // 解析第二行 (数据行)
+                     // POSIX 格式: Filesystem 1024-blocks Used Available Capacity Mounted on
+                     // parts[1]=Total(KB), parts[2]=Used(KB), parts[4]=Capacity(%)
+                     if (parts.length >= 5) {
+                         const total = parseInt(parts[1], 10);
+                         const used = parseInt(parts[2], 10);
+                         const percentMatch = parts[4].match(/(\d+)%/);
+                         if (!isNaN(total) && !isNaN(used) && percentMatch) {
+                             status.diskTotal = total; status.diskUsed = used;
+                             status.diskPercent = parseFloat(percentMatch[1]);
+                         }
                      }
                  }
              } catch (err) { console.warn(`[StatusMonitor ${sessionId}] Failed to get disk usage:`, err); }
diff --git a/packages/frontend/package.json b/packages/frontend/package.json
index 332183f..e067806 100644
--- a/packages/frontend/package.json
+++ b/packages/frontend/package.json
@@ -8,11 +8,13 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@fortawesome/fontawesome-free": "^6.7.2",
     "@simplewebauthn/browser": "^13.1.0",
     "axios": "^1.8.4",
     "monaco-editor": "^0.52.2",
     "pinia": "^3.0.2",
     "pinia-plugin-persistedstate": "^4.2.0",
+    "splitpanes": "^4.0.3",
     "vite-plugin-monaco-editor": "^1.1.0",
     "vue": "^3.3.0",
     "vue-i18n": "^9.14.4",
@@ -22,6 +24,7 @@
     "xterm-addon-web-links": "^0.9.0"
   },
   "devDependencies": {
+    "@types/splitpanes": "^2.2.6",
     "@vitejs/plugin-vue": "^4.2.0",
     "typescript": "^5.0.0",
     "vite": "^4.4.0",
diff --git a/packages/frontend/src/App.vue b/packages/frontend/src/App.vue
index ebc3930..a1876e9 100644
--- a/packages/frontend/src/App.vue
+++ b/packages/frontend/src/App.vue
@@ -1,10 +1,12 @@
 <script setup lang="ts">
 import { RouterLink, RouterView } from 'vue-router';
-import { useI18n } from 'vue-i18n'; // 引入 useI18n
-import { useAuthStore } from './stores/auth.store'; // 引入 Auth Store
+import { useI18n } from 'vue-i18n';
+import { useAuthStore } from './stores/auth.store';
 import { storeToRefs } from 'pinia';
+// 导入通知显示组件
+import UINotificationDisplay from './components/UINotificationDisplay.vue';
 
-const { t } = useI18n(); // 获取 t 函数
+const { t } = useI18n();
 const authStore = useAuthStore();
 const { isAuthenticated } = storeToRefs(authStore); // 获取登录状态
 
@@ -34,6 +36,9 @@ const handleLogout = () => {
       <RouterView /> <!-- 路由对应的组件将在这里渲染 -->
     </main>
 
+    <!-- 添加全局通知显示 -->
+    <UINotificationDisplay />
+
     <footer>
       <!-- 使用 t 函数获取应用名称 -->
       <p>&copy; 2025 {{ t('appName') }}</p>
diff --git a/packages/frontend/src/components/FileManager.vue b/packages/frontend/src/components/FileManager.vue
index 3d0b3bf..3469d4e 100644
--- a/packages/frontend/src/components/FileManager.vue
+++ b/packages/frontend/src/components/FileManager.vue
@@ -527,7 +527,7 @@ watchEffect((onCleanup) => {
             if (message.requestId === requestId && payload.requestedPath === requestedPath) {
                 const absolutePath = payload.absolutePath;
                 console.log(`[FileManager ${props.sessionId}] 收到 '.' 的绝对路径: ${absolutePath}。开始加载目录。`);
-                currentPath.value = absolutePath;
+                // 不再直接修改 currentPath.value，而是调用 loadDirectory，它内部会更新路径
                 loadDirectory(absolutePath); // 使用 props 中的 loadDirectory
                 initialLoadDone.value = true;
                 cleanupListeners();
@@ -700,11 +700,8 @@ const clearError = () => {
       @dragleave.prevent="handleDragLeave"
       @drop.prevent="handleDrop"
     >
-        <!-- Error Alert Box -->
-        <div v-if="error" class="error-alert">
-            <span>{{ error }}</span>
-            <button @click="clearError" class="close-error-btn" :title="t('common.dismiss')">&times;</button> <!-- Use clearSftpError -->
-        </div>
+        <!-- 移除内联错误提示框 -->
+        <!-- <div v-if="error" class="error-alert"> ... </div> -->
 
         <!-- 1. Initial Loading Indicator -->
         <div v-if="isLoading && !initialLoadDone" class="loading">{{ t('fileManager.loading') }}</div>
@@ -851,28 +848,9 @@ const clearError = () => {
 .upload-popup .error { color: red; margin-left: 0.5rem; flex-basis: 100%; font-size: 0.8em; }
 .upload-popup .cancel-btn { margin-left: auto; padding: 0.1rem 0.4rem; font-size: 0.8em; background-color: #f8d7da; border: 1px solid #f5c6cb; color: #721c24; cursor: pointer; }
 .loading, .no-files { padding: 1rem; text-align: center; color: #666; }
-/* Removed .error style for the main container */
-.error-alert {
-    background-color: #f8d7da;
-    color: #721c24;
-    border: 1px solid #f5c6cb;
-    padding: 0.75rem 1.25rem;
-    margin: 0.5rem;
-    border-radius: 0.25rem;
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-}
-.close-error-btn {
-    background: none;
-    border: none;
-    color: inherit;
-    font-size: 1.2rem;
-    font-weight: bold;
-    cursor: pointer;
-    padding: 0 0.5rem;
-    line-height: 1;
-}
+/* 移除 .error-alert 和 .close-error-btn 样式 */
+/* .error-alert { ... } */
+/* .close-error-btn { ... } */
 .file-list-container { flex-grow: 1; overflow-y: auto; position: relative; /* Needed for overlay */ }
 .file-list-container.drag-over {
   outline: 2px dashed #007bff; /* Blue dashed outline */
diff --git a/packages/frontend/src/components/StatusMonitor.vue b/packages/frontend/src/components/StatusMonitor.vue
index 3e5ba4b..acf5f1c 100644
--- a/packages/frontend/src/components/StatusMonitor.vue
+++ b/packages/frontend/src/components/StatusMonitor.vue
@@ -1,10 +1,15 @@
 <template>
   <div class="status-monitor">
     <h4>服务器状态</h4>
-    <div v-if="!serverStatus" class="loading-status">
+    <!-- Corrected state display logic -->
+    <div v-if="statusError" class="status-error">
+      错误: {{ statusError }}
+    </div>
+    <div v-else-if="!serverStatus" class="loading-status">
       等待数据...
     </div>
     <div v-else class="status-grid">
+      <!-- Status items remain here -->
       <div class="status-item cpu-model">
         <label>CPU 型号:</label>
         <!-- 使用 displayCpuModel 计算属性 -->
@@ -18,43 +23,54 @@
       </div>
       <div class="status-item">
         <label>CPU:</label>
-        <div class="progress-bar-container">
-          <div class="progress-bar" :style="{ width: `${serverStatus.cpuPercent ?? 0}%` }"></div>
+        <!-- Wrap progress bar and percentage in a div -->
+        <div class="value-wrapper">
+          <div class="progress-bar-container">
+            <div class="progress-bar" :style="{ width: `${serverStatus.cpuPercent ?? 0}%` }"></div>
+          </div>
+          <span>{{ serverStatus.cpuPercent?.toFixed(1) ?? 'N/A' }}%</span>
         </div>
-        <span>{{ serverStatus.cpuPercent?.toFixed(1) ?? 'N/A' }}%</span>
       </div>
       <div class="status-item">
         <label>内存:</label>
-        <div class="progress-bar-container">
-          <div class="progress-bar" :style="{ width: `${serverStatus.memPercent ?? 0}%` }"></div>
+        <div class="value-wrapper">
+          <div class="progress-bar-container">
+            <div class="progress-bar" :style="{ width: `${serverStatus.memPercent ?? 0}%` }"></div>
+          </div>
+          <span class="mem-disk-details">{{ memDisplay }}</span>
         </div>
-        <span class="mem-disk-details">{{ memDisplay }}</span>
       </div>
        <!-- Removed v-if, Swap will always show -->
        <div class="status-item">
         <label>Swap:</label>
-        <div class="progress-bar-container">
-          <div class="progress-bar swap-bar" :style="{ width: `${serverStatus.swapPercent ?? 0}%` }"></div>
+        <div class="value-wrapper">
+          <div class="progress-bar-container">
+            <div class="progress-bar swap-bar" :style="{ width: `${serverStatus.swapPercent ?? 0}%` }"></div>
+          </div>
+          <span class="mem-disk-details">{{ swapDisplay }}</span>
         </div>
-        <span class="mem-disk-details">{{ swapDisplay }}</span>
       </div>
       <div class="status-item">
-        <label>磁盘 (/):</label>
-        <div class="progress-bar-container">
-          <div class="progress-bar" :style="{ width: `${serverStatus.diskPercent ?? 0}%` }"></div>
+        <label>磁盘:</label> <!-- 移除 (/) -->
+        <div class="value-wrapper">
+          <div class="progress-bar-container">
+            <div class="progress-bar" :style="{ width: `${serverStatus.diskPercent ?? 0}%` }"></div>
+          </div>
+          <span class="mem-disk-details">{{ diskDisplay }}</span>
         </div>
-        <span class="mem-disk-details">{{ diskDisplay }}</span>
       </div>
       <div class="status-item network-rate">
           <label>网络 ({{ serverStatus.netInterface || '...' }}):</label>
-          <span class="rate down">⬇ {{ formatBytesPerSecond(serverStatus.netRxRate) }}</span>
-          <span class="rate up">⬆ {{ formatBytesPerSecond(serverStatus.netTxRate) }}</span>
+          <!-- Wrap rates in a div for alignment -->
+          <div class="value-wrapper network-values">
+            <span class="rate down">{{ formatBytesPerSecond(serverStatus.netRxRate) }}</span>
+            <span class="rate up">{{ formatBytesPerSecond(serverStatus.netTxRate) }}</span>
+          </div>
       </div>
     </div>
-     <div v-if="statusError" class="status-error">
-        错误: {{ statusError }}
-     </div>
+    <!-- Error display moved up for correct v-if/v-else-if logic -->
   </div>
+  <!-- Removed extra closing div -->
 </template>
 
 <script setup lang="ts">
@@ -207,40 +223,48 @@ const swapDisplay = computed(() => {
 
 .status-item {
   display: grid;
-  /* Adjusted grid columns for better alignment */
-  grid-template-columns: 65px 1fr auto; /* Label slightly wider */
+  /* Simplified grid columns: Label | Value Area - Further increased label width */
+  grid-template-columns: 100px 1fr;
   align-items: center;
-  gap: 0.5rem;
+  gap: 0.8rem; /* Keep increased gap */
 }
 
-/* Specific style for CPU model row */
+/* New wrapper for value area (progress bar + text or just text) */
+.value-wrapper {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem; /* Space between progress bar and text */
+}
+
+/* Specific style for CPU model row - Keep consistent with general status-item */
 .status-item.cpu-model {
-  grid-template-columns: 65px 1fr; /* Label, Value */
-  gap: 0.5rem;
+  /* grid-template-columns is inherited */
+  /* gap is inherited */
   margin-bottom: 0.5rem; /* Add some space below CPU model */
 }
 .cpu-model-value {
     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;
-    grid-column: 2 / 4; /* Span across the value and percentage columns */
+    /* No longer needs grid-column span */
     text-align: left;
     color: #333;
 }
 
-/* Specific style for OS name row */
+/* Specific style for OS name row - Keep consistent with general status-item */
 .status-item.os-name {
-  grid-template-columns: 65px 1fr; /* Label, Value */
+  /* grid-template-columns is inherited */
   /* Ensure the item itself doesn't align right if the parent has text-align */
    text-align: left;
 }
 /* Increased specificity to override generic span rule */
+/* OS name value should just occupy the second column */
 .status-item.os-name .os-name-value {
     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;
     text-align: left; /* Explicitly left align text */
-    justify-self: start; /* Align grid item to start */
+    /* justify-self: start; No longer needed with 2-col grid */
     color: #333;
     min-width: auto; /* Override generic min-width */
 }
@@ -249,7 +273,7 @@ const swapDisplay = computed(() => {
 .status-item label {
   font-weight: bold;
   color: #555;
-  text-align: right;
+  text-align: left; /* 改为左对齐 */
   white-space: nowrap;
 }
 
@@ -278,32 +302,59 @@ const swapDisplay = computed(() => {
 .status-item span:not(.cpu-model-value) { /* Style for percentage spans */
   font-variant-numeric: tabular-nums; /* Keep numbers aligned */
   min-width: 45px; /* Ensure space for percentage */
-  text-align: right;
+  text-align: left; /* 改为左对齐 */
   color: #333;
 }
 
 .mem-disk-details {
     font-size: 0.9em; /* Slightly smaller font for details */
     white-space: nowrap;
-    text-align: right;
+    text-align: left; /* 改为左对齐 */
 }
 
 /* Network Rate Styles */
+/* Network Rate Styles - uses the 2-col grid */
 .status-item.network-rate {
-    grid-template-columns: 65px auto auto; /* Label, Down Rate, Up Rate */
+    /* grid-template-columns is inherited */
     margin-top: 0.5rem; /* Add space above network */
+    align-items: center; /* Try centering label and rates vertically */
+}
+/* Adjust network value wrapper */
+.network-values {
+    justify-content: start; /* Align rates to the start */
+    gap: 1rem; /* Increase gap between rates */
+    /* Removed margin-left, rely on grid gap */
+    /* Ensure the wrapper itself aligns correctly if needed */
+    /* align-self: center; */ /* Or baseline */
 }
 .network-rate .rate {
     font-size: 0.9em;
     white-space: nowrap;
-    text-align: right;
-    min-width: 80px; /* Adjust as needed */
+    text-align: left; /* 改为左对齐 */
+    min-width: auto; /* Remove min-width or adjust */
+    /* Rely on parent flexbox for alignment */
+    display: inline-flex; /* Ensure pseudo-element is part of flex flow */
+    align-items: center; /* Vertically align arrow with text */
+    gap: 0.3em; /* Add space between arrow and text */
 }
 .network-rate .rate.down {
     color: #28a745; /* Green for download */
 }
+.network-rate .rate.down::before {
+    content: '⬇';
+    /* Removed absolute positioning */
+    font-size: 1em; /* Match parent font size */
+    line-height: 1; /* Adjust line-height for better vertical alignment */
+}
+
 .network-rate .rate.up {
     color: #fd7e14; /* Orange for upload */
 }
+.network-rate .rate.up::before {
+    content: '⬆';
+    /* Removed absolute positioning */
+    font-size: 1em; /* Match parent font size */
+    line-height: 1; /* Adjust line-height for better vertical alignment */
+}
 
 </style>
diff --git a/packages/frontend/src/components/Terminal.vue b/packages/frontend/src/components/Terminal.vue
index ed6742c..12fbb25 100644
--- a/packages/frontend/src/components/Terminal.vue
+++ b/packages/frontend/src/components/Terminal.vue
@@ -118,11 +118,20 @@ onMounted(() => {
 
     // 监听 isActive prop 的变化，当标签变为活动时立即 fit 并发送 resize
     watch(() => props.isActive, (newValue) => {
-        if (newValue && terminal && terminalRef.value && terminalRef.value.offsetHeight > 0) {
-            console.log(`[Terminal ${props.sessionId}] Tab became active, performing immediate fit and resize.`);
-            // 使用 nextTick 确保 DOM 更新完成
+        if (newValue && terminal && terminalRef.value) {
+            // 当标签变为活动时，等待 DOM 更新和短暂延时后执行 fit
+            console.log(`[Terminal ${props.sessionId}] 标签变为活动状态，准备调整尺寸。`); // 日志改为中文
             nextTick(() => {
-                fitAndEmitResizeNow(terminal!);
+                // 添加短暂延时，确保元素完全可见且渲染稳定
+                setTimeout(() => {
+                    // 再次检查终端实例是否存在且容器可见
+                    if (terminal && terminalRef.value && terminalRef.value.offsetHeight > 0) {
+                         console.log(`[Terminal ${props.sessionId}] 执行延时后的 fit 和 resize。`); // 日志改为中文
+                        fitAndEmitResizeNow(terminal);
+                    } else {
+                         console.log(`[Terminal ${props.sessionId}] 延时后检查：终端不可见或已销毁，跳过 fit。`); // 日志改为中文
+                    }
+                }, 50); // 50ms 延时，可以根据需要调整
             });
         }
     });
diff --git a/packages/frontend/src/components/TerminalTabBar.vue b/packages/frontend/src/components/TerminalTabBar.vue
index 6608a29..a60db1f 100644
--- a/packages/frontend/src/components/TerminalTabBar.vue
+++ b/packages/frontend/src/components/TerminalTabBar.vue
@@ -1,16 +1,12 @@
 <script setup lang="ts">
 import { PropType } from 'vue';
-
-// 定义会话状态的简化接口 (仅包含标签栏需要的信息)
-interface SessionTabInfo {
-  sessionId: string;
-  connectionName: string; // 显示在标签上的名称
-}
+// 导入会话状态类型
+import type { SessionTabInfoWithStatus } from '../stores/session.store'; // 导入更新后的类型
 
 // 定义 Props
 const props = defineProps({
   sessions: {
-    type: Array as PropType<SessionTabInfo[]>,
+    type: Array as PropType<SessionTabInfoWithStatus[]>, // 使用更新后的类型
     required: true,
   },
   activeSessionId: {
@@ -44,6 +40,8 @@ const closeSession = (event: MouseEvent, sessionId: string) => {
         @click="activateSession(session.sessionId)"
         :title="session.connectionName"
       >
+        <!-- 添加状态点 -->
+        <span :class="['status-dot', `status-${session.status}`]"></span>
         <span class="tab-name">{{ session.connectionName }}</span>
         <button class="close-tab-button" @click="closeSession($event, session.sessionId)" title="关闭标签页">
           &times; <!-- 使用 HTML 实体 '×' -->
@@ -67,6 +65,22 @@ const closeSession = (event: MouseEvent, sessionId: string) => {
   box-sizing: border-box; /* 确保 padding 不会增加总高度 */
 }
 
+/* 状态点样式 */
+.status-dot {
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  margin-right: 6px;
+  display: inline-block;
+  vertical-align: middle;
+  flex-shrink: 0; /* 防止被压缩 */
+}
+.status-dot.status-disconnected { background-color: #dc3545; } /* 红色 */
+.status-dot.status-connecting { background-color: #ffc107; } /* 黄色 */
+.status-dot.status-connected { background-color: #28a745; } /* 绿色 */
+.status-dot.status-error { background-color: #6c757d; } /* 灰色 (或其他表示错误的颜色) */
+
+
 .tab-list {
   list-style: none;
   padding: 0;
@@ -105,8 +119,10 @@ const closeSession = (event: MouseEvent, sessionId: string) => {
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
-  margin-right: 1.5rem; /* 为关闭按钮留出足够空间 */
+  /* margin-right: 1.5rem; */ /* 调整右边距，因为关闭按钮现在是 flex item */
   line-height: normal; /* 默认行高 */
+  flex-grow: 1; /* 允许名称伸展 */
+  margin-left: 4px; /* 在状态点和名称之间添加一点间距 */
 }
 
 .close-tab-button {
diff --git a/packages/frontend/src/components/UINotificationDisplay.vue b/packages/frontend/src/components/UINotificationDisplay.vue
new file mode 100644
index 0000000..a940c27
--- /dev/null
+++ b/packages/frontend/src/components/UINotificationDisplay.vue
@@ -0,0 +1,109 @@
+<script setup lang="ts">
+import { useUiNotificationsStore } from '../stores/uiNotifications.store';
+import { storeToRefs } from 'pinia';
+
+const notificationsStore = useUiNotificationsStore();
+const { notifications } = storeToRefs(notificationsStore);
+
+const getIconClass = (type: string) => {
+  switch (type) {
+    case 'success': return 'fas fa-check-circle';
+    case 'error': return 'fas fa-times-circle';
+    case 'info': return 'fas fa-info-circle';
+    case 'warning': return 'fas fa-exclamation-triangle';
+    default: return '';
+  }
+};
+
+const getContainerClass = (type: string) => {
+  return `notification-item notification-${type}`;
+};
+</script>
+
+<template>
+  <div class="notification-container">
+    <transition-group name="notification-fade" tag="div">
+      <div
+        v-for="notification in notifications"
+        :key="notification.id"
+        :class="getContainerClass(notification.type)"
+      >
+        <i :class="['notification-icon', getIconClass(notification.type)]"></i>
+        <span class="notification-message">{{ notification.message }}</span>
+        <button
+          class="notification-close-btn"
+          @click="notificationsStore.removeNotification(notification.id)"
+        >
+          &times;
+        </button>
+      </div>
+    </transition-group>
+  </div>
+</template>
+
+<style scoped>
+.notification-container {
+  position: fixed;
+  top: 1rem; /* 距离顶部 */
+  right: 1rem; /* 距离右侧 */
+  z-index: 1100; /* 比其他元素层级高 */
+  display: flex;
+  flex-direction: column;
+  align-items: flex-end; /* 从右侧对齐 */
+}
+
+.notification-item {
+  background-color: #fff;
+  color: #fff;
+  padding: 0.8rem 1.2rem;
+  margin-bottom: 0.5rem;
+  border-radius: 4px;
+  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+  display: flex;
+  align-items: center;
+  min-width: 250px; /* 最小宽度 */
+  max-width: 400px; /* 最大宽度 */
+  opacity: 0.95;
+  transition: all 0.5s ease; /* 添加过渡效果 */
+}
+
+.notification-success { background-color: #28a745; } /* 绿色 */
+.notification-error { background-color: #dc3545; } /* 红色 */
+.notification-info { background-color: #17a2b8; } /* 蓝色 */
+.notification-warning { background-color: #ffc107; color: #333; } /* 黄色，文字用深色 */
+
+.notification-icon {
+  margin-right: 0.8rem;
+  font-size: 1.2em;
+}
+
+.notification-message {
+  flex-grow: 1;
+  word-wrap: break-word; /* 允许长单词换行 */
+}
+
+.notification-close-btn {
+  background: none;
+  border: none;
+  color: inherit; /* 继承父元素颜色 */
+  opacity: 0.7;
+  cursor: pointer;
+  font-size: 1.2em;
+  margin-left: 1rem;
+  padding: 0 0.3rem;
+}
+.notification-close-btn:hover {
+  opacity: 1;
+}
+
+/* 过渡动画 */
+.notification-fade-enter-active,
+.notification-fade-leave-active {
+  transition: all 0.5s ease;
+}
+.notification-fade-enter-from,
+.notification-fade-leave-to {
+  opacity: 0;
+  transform: translateX(30px); /* 从右侧滑入 */
+}
+</style>
diff --git a/packages/frontend/src/components/WorkspaceConnectionList.vue b/packages/frontend/src/components/WorkspaceConnectionList.vue
index 255ff8a..72a3699 100644
--- a/packages/frontend/src/components/WorkspaceConnectionList.vue
+++ b/packages/frontend/src/components/WorkspaceConnectionList.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, computed, onMounted } from 'vue';
+import { ref, computed, onMounted } from 'vue'; // 确保 ref 已导入
 import { storeToRefs } from 'pinia';
 // import { useRouter } from 'vue-router'; // 不再需要 router
 import { useI18n } from 'vue-i18n';
@@ -22,6 +22,9 @@ const tagsStore = useTagsStore();
 const { connections, isLoading: connectionsLoading, error: connectionsError } = storeToRefs(connectionsStore);
 const { tags, isLoading: tagsLoading, error: tagsError } = storeToRefs(tagsStore);
 
+// 搜索词
+const searchTerm = ref('');
+
 // 右键菜单状态
 const contextMenuVisible = ref(false);
 const contextMenuPosition = ref({ x: 0, y: 0 });
@@ -30,38 +33,59 @@ const contextTargetConnection = ref<ConnectionInfo | null>(null);
 // 分组展开状态
 const expandedGroups = ref<Record<string, boolean>>({}); // 使用 Record<string, boolean>
 
-// 计算属性：按标签分组连接
-const groupedConnections = computed(() => {
+// 计算属性：过滤并按标签分组连接
+const filteredAndGroupedConnections = computed(() => {
   const groups: Record<string, ConnectionInfo[]> = {};
   const untagged: ConnectionInfo[] = [];
   const tagMap = new Map(tags.value.map(tag => [tag.id, tag]));
+  const lowerSearchTerm = searchTerm.value.toLowerCase();
 
-  connections.value.forEach(conn => {
+  // 1. 过滤连接
+  const filteredConnections = connections.value.filter(conn => {
+    const nameMatch = conn.name && conn.name.toLowerCase().includes(lowerSearchTerm);
+    const hostMatch = conn.host.toLowerCase().includes(lowerSearchTerm);
+    // 如果有 IP 地址字段，也应包含在此处
+    // const ipMatch = conn.ipAddress && conn.ipAddress.toLowerCase().includes(lowerSearchTerm);
+    return nameMatch || hostMatch; // || ipMatch;
+  });
+
+  // 2. 分组过滤后的连接
+  filteredConnections.forEach(conn => {
     if (conn.tag_ids && conn.tag_ids.length > 0) {
+      let tagged = false; // 标记是否至少加入了一个分组
       conn.tag_ids.forEach(tagId => {
         const tag = tagMap.get(tagId);
-        const groupName = tag ? tag.name : t('workspaceConnectionList.untagged'); // Fallback if tag not found
-        if (!groups[groupName]) {
-          groups[groupName] = [];
-          if (expandedGroups.value[groupName] === undefined) {
-             expandedGroups.value[groupName] = true; // 默认展开
+        // 确保标签存在才分组
+        if (tag) {
+          const groupName = tag.name;
+          if (!groups[groupName]) {
+            groups[groupName] = [];
+            if (expandedGroups.value[groupName] === undefined) {
+               expandedGroups.value[groupName] = true; // 默认展开
+            }
           }
+          // 避免重复添加（如果一个连接有多个标签）
+          if (!groups[groupName].some(c => c.id === conn.id)) {
+              groups[groupName].push(conn);
+          }
+          tagged = true;
         }
-        groups[groupName].push(conn);
       });
+      // 如果所有标签都无效或未找到，则归入未标记
+      if (!tagged) {
+          untagged.push(conn);
+      }
     } else {
       untagged.push(conn);
     }
   });
 
-  // 对每个分组内的连接按名称或主机排序
+  // 3. 排序和格式化输出
   for (const groupName in groups) {
       groups[groupName].sort((a, b) => (a.name || a.host).localeCompare(b.name || b.host));
   }
   untagged.sort((a, b) => (a.name || a.host).localeCompare(b.name || b.host));
 
-
-  // 将未标记的分组放在最后
   const sortedGroupNames = Object.keys(groups).sort();
   const result: { groupName: string; connections: ConnectionInfo[] }[] = sortedGroupNames.map(name => ({
       groupName: name,
@@ -150,34 +174,62 @@ const handleOpenInNewTab = (connectionId: number) => {
     </div>
     <div v-else-if="connections.length === 0" class="no-connections">
       {{ t('connections.noConnections') }}
-      <button @click="handleMenuAction('add')">{{ t('connections.addConnection') }}</button>
+      <!-- 保留添加按钮，即使列表为空 -->
+      <!-- <button @click="handleMenuAction('add')">{{ t('connections.addConnection') }}</button> -->
     </div>
-    <div v-else>
-      <!-- 添加连接按钮（总是在顶部） -->
-      <button class="add-connection-button" @click="handleMenuAction('add')">
-        <i class="fas fa-plus"></i> {{ t('connections.addConnection') }}
+    <!-- 搜索和添加栏 -->
+    <div class="search-add-bar">
+      <input
+        type="text"
+        v-model="searchTerm"
+        :placeholder="t('workspaceConnectionList.searchPlaceholder')"
+        class="search-input"
+      />
+      <button class="add-button" @click="handleMenuAction('add')" :title="t('connections.addConnection')">
+        <i class="fas fa-plus"></i>
       </button>
-      <div v-for="group in groupedConnections" :key="group.groupName" class="connection-group">
-        <div class="group-header" @click="toggleGroup(group.groupName)">
-          <i :class="['fas', expandedGroups[group.groupName] ? 'fa-chevron-down' : 'fa-chevron-right']"></i>
-          <span>{{ group.groupName }}</span>
+    </div>
+
+    <!-- 连接列表区域 -->
+    <div class="connection-list-area">
+      <div v-if="connectionsLoading || tagsLoading" class="loading">
+        {{ t('common.loading') }}
+      </div>
+      <div v-else-if="connectionsError || tagsError" class="error">
+        {{ connectionsError || tagsError }}
+      </div>
+      <div v-else-if="filteredAndGroupedConnections.length === 0 && connections.length > 0" class="no-results">
+         {{ t('workspaceConnectionList.noResults') }} "{{ searchTerm }}"
+      </div>
+      <div v-else-if="connections.length === 0" class="no-connections">
+         {{ t('connections.noConnections') }}
+      </div>
+      <div v-else>
+        <!-- 修正: 循环 filteredAndGroupedConnections -->
+        <div v-for="groupData in filteredAndGroupedConnections" :key="groupData.groupName" class="connection-group">
+          <div class="group-header" @click="toggleGroup(groupData.groupName)">
+            <i :class="['fas', expandedGroups[groupData.groupName] ? 'fa-chevron-down' : 'fa-chevron-right']"></i>
+            <span>{{ groupData.groupName }}</span>
+          </div>
+          <!-- 修正: 使用 groupData.groupName 和 groupData.connections -->
+          <ul v-show="expandedGroups[groupData.groupName]" class="connection-items">
+            <li
+              v-for="conn in groupData.connections"
+              :key="conn.id"
+              class="connection-item"
+              @click.left="handleConnect(conn.id)"
+              @click.middle.prevent="handleOpenInNewTab(conn.id)"
+              @auxclick.prevent="handleOpenInNewTab(conn.id)"
+              @contextmenu.prevent="showContextMenu($event, conn)"
+            >
+              <i class="fas fa-server connection-icon"></i>
+              <span class="connection-name" :title="conn.name || conn.host">
+                {{ conn.name || conn.host }}
+              </span>
+            </li>
+          </ul>
         </div>
-        <ul v-show="expandedGroups[group.groupName]" class="connection-items">
-          <li
-            v-for="conn in group.connections"
-            :key="conn.id"
-            class="connection-item"
-            @click.left="handleConnect(conn.id)"
-            @click.middle.prevent="handleOpenInNewTab(conn.id)"
-            @auxclick.prevent="handleOpenInNewTab(conn.id)"
-            @contextmenu.prevent="showContextMenu($event, conn)"
-          >
-            <i class="fas fa-server connection-icon"></i>
-            <span class="connection-name" :title="conn.name || conn.host">
-              {{ conn.name || conn.host }}
-            </span>
-          </li>
-        </ul>
+        <!-- 移除重复的 ul 块 -->
       </div>
     </div>
 
@@ -200,14 +252,58 @@ const handleOpenInNewTab = (connectionId: number) => {
 
 <style scoped>
 .workspace-connection-list {
-  padding: 0.5rem 0;
   height: 100%;
-  overflow-y: auto;
-  background-color: #f8f9fa; /* Slightly different background */
+  display: flex;
+  flex-direction: column;
+  overflow: hidden; /* 防止内部滚动条影响布局 */
+  background-color: #f8f9fa;
   font-size: 0.9em;
 }
 
-.loading, .error, .no-connections {
+.search-add-bar {
+  display: flex;
+  padding: 0.5rem;
+  border-bottom: 1px solid #dee2e6;
+  background-color: #e9ecef; /* 给搜索栏一个背景色 */
+}
+
+.search-input {
+  flex-grow: 1;
+  padding: 0.4rem 0.6rem;
+  border: 1px solid #ced4da;
+  border-radius: 4px 0 0 4px; /* 左侧圆角 */
+  font-size: 0.9em;
+  outline: none;
+}
+.search-input:focus {
+  border-color: #80bdff;
+  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
+}
+
+.add-button {
+  padding: 0.4rem 0.8rem;
+  border: 1px solid #ced4da;
+  border-left: none; /* 移除左边框，与输入框合并 */
+  background-color: #f8f9fa;
+  cursor: pointer;
+  border-radius: 0 4px 4px 0; /* 右侧圆角 */
+  color: #495057;
+}
+.add-button:hover {
+  background-color: #e2e6ea;
+}
+.add-button i {
+  font-size: 1em; /* 图标大小 */
+}
+
+.connection-list-area {
+  flex-grow: 1; /* 占据剩余空间 */
+  overflow-y: auto; /* 列表内容滚动 */
+  padding: 0.5rem 0;
+}
+
+
+.loading, .error, .no-connections, .no-results {
   padding: 1rem;
   text-align: center;
   color: #6c757d;
diff --git a/packages/frontend/src/composables/useSftpActions.ts b/packages/frontend/src/composables/useSftpActions.ts
index 8792bf4..52b92bd 100644
--- a/packages/frontend/src/composables/useSftpActions.ts
+++ b/packages/frontend/src/composables/useSftpActions.ts
@@ -1,6 +1,8 @@
-import { ref, readonly, type Ref, type ComputedRef } from 'vue'; // Removed onUnmounted, added ComputedRef
+import { ref, readonly, type Ref, type ComputedRef } from 'vue';
 import type { FileListItem, EditorFileContent } from '../types/sftp.types';
-import type { WebSocketMessage, MessagePayload, MessageHandler } from '../types/websocket.types'; // 从类型文件导入
+import type { WebSocketMessage, MessagePayload, MessageHandler } from '../types/websocket.types';
+// 导入 UI 通知 store
+import { useUiNotificationsStore } from '../stores/uiNotifications.store'; // 更正导入
 
 /**
  * @interface WebSocketDependencies
@@ -49,8 +51,9 @@ export function createSftpActionsManager(
 
     const fileList = ref<FileListItem[]>([]);
     const isLoading = ref<boolean>(false);
-    const error = ref<string | null>(null);
+    // const error = ref<string | null>(null); // 不再使用本地 error ref
     const instanceSessionId = sessionId; // 保存会话 ID 用于日志
+    const uiNotificationsStore = useUiNotificationsStore(); // 初始化 UI 通知 store
 
     // 用于存储注销函数的数组
     const unregisterCallbacks: (() => void)[] = [];
@@ -62,25 +65,24 @@ export function createSftpActionsManager(
         unregisterCallbacks.length = 0; // 清空数组
     };
 
-    // 清除错误状态的函数
-    const clearSftpError = () => {
-        error.value = null;
-    };
+    // 不再需要 clearSftpError 函数
+    // const clearSftpError = () => { ... };
 
     // --- Action Methods ---
 
     const loadDirectory = (path: string) => {
         if (!isSftpReady.value) {
-            error.value = t('fileManager.errors.sftpNotReady');
+            // 使用通知 store 显示错误
+            uiNotificationsStore.showError(t('fileManager.errors.sftpNotReady'), { timeout: 5000 }); // 使用 uiNotificationsStore
             isLoading.value = false;
             fileList.value = [];
-            console.warn(`[SFTP ${instanceSessionId}] Attempted to load directory ${path} but SFTP is not ready.`);
+            console.warn(`[SFTP ${instanceSessionId}] 尝试加载目录 ${path} 但 SFTP 未就绪。`); // 日志改为中文
             return;
         }
 
-        console.log(`[SFTP ${instanceSessionId}] Loading directory: ${path}`);
+        console.log(`[SFTP ${instanceSessionId}] 正在加载目录: ${path}`); // 日志改为中文
         isLoading.value = true;
-        error.value = null;
+        // error.value = null; // 不再需要
         currentPathRef.value = path; // 更新外部 ref
         const requestId = generateRequestId();
         sendMessage({ type: 'sftp:readdir', requestId: requestId, payload: { path } });
@@ -88,8 +90,8 @@ export function createSftpActionsManager(
 
     const createDirectory = (newDirName: string) => {
         if (!isSftpReady.value) {
-            error.value = t('fileManager.errors.sftpNotReady');
-            console.warn(`[SFTP ${instanceSessionId}] Attempted to create directory ${newDirName} but SFTP is not ready.`);
+            uiNotificationsStore.showError(t('fileManager.errors.sftpNotReady'), { timeout: 5000 }); // 使用 uiNotificationsStore
+            console.warn(`[SFTP ${instanceSessionId}] 尝试创建目录 ${newDirName} 但 SFTP 未就绪。`); // 日志改为中文
             return;
         }
         const newFolderPath = joinPath(currentPathRef.value, newDirName);
@@ -99,8 +101,8 @@ export function createSftpActionsManager(
 
     const createFile = (newFileName: string) => {
         if (!isSftpReady.value) {
-            error.value = t('fileManager.errors.sftpNotReady');
-            console.warn(`[SFTP ${instanceSessionId}] Attempted to create file ${newFileName} but SFTP is not ready.`);
+            uiNotificationsStore.showError(t('fileManager.errors.sftpNotReady'), { timeout: 5000 }); // 使用 uiNotificationsStore
+            console.warn(`[SFTP ${instanceSessionId}] 尝试创建文件 ${newFileName} 但 SFTP 未就绪。`); // 日志改为中文
             return;
         }
         const newFilePath = joinPath(currentPathRef.value, newFileName);
@@ -114,8 +116,8 @@ export function createSftpActionsManager(
 
     const deleteItems = (items: FileListItem[]) => {
         if (!isSftpReady.value) {
-            error.value = t('fileManager.errors.sftpNotReady');
-            console.warn(`[SFTP ${instanceSessionId}] Attempted to delete items but SFTP is not ready.`);
+            uiNotificationsStore.showError(t('fileManager.errors.sftpNotReady'), { timeout: 5000 }); // 使用 uiNotificationsStore
+            console.warn(`[SFTP ${instanceSessionId}] 尝试删除项目但 SFTP 未就绪。`); // 日志改为中文
             return;
         }
         if (items.length === 0) return;
@@ -129,8 +131,8 @@ export function createSftpActionsManager(
 
     const renameItem = (item: FileListItem, newName: string) => {
         if (!isSftpReady.value) {
-            error.value = t('fileManager.errors.sftpNotReady');
-            console.warn(`[SFTP ${instanceSessionId}] Attempted to rename item ${item.filename} but SFTP is not ready.`);
+            uiNotificationsStore.showError(t('fileManager.errors.sftpNotReady'), { timeout: 5000 }); // 使用 uiNotificationsStore
+            console.warn(`[SFTP ${instanceSessionId}] 尝试重命名项目 ${item.filename} 但 SFTP 未就绪。`); // 日志改为中文
             return;
         }
         if (!newName || item.filename === newName) return;
@@ -142,8 +144,8 @@ export function createSftpActionsManager(
 
     const changePermissions = (item: FileListItem, mode: number) => {
         if (!isSftpReady.value) {
-            error.value = t('fileManager.errors.sftpNotReady');
-            console.warn(`[SFTP ${instanceSessionId}] Attempted to change permissions for ${item.filename} but SFTP is not ready.`);
+            uiNotificationsStore.showError(t('fileManager.errors.sftpNotReady'), { timeout: 5000 }); // 使用 uiNotificationsStore
+            console.warn(`[SFTP ${instanceSessionId}] 尝试修改 ${item.filename} 的权限但 SFTP 未就绪。`); // 日志改为中文
             return;
         }
         const targetPath = joinPath(currentPathRef.value, item.filename);
@@ -155,8 +157,10 @@ export function createSftpActionsManager(
     const readFile = (path: string): Promise<EditorFileContent> => {
         return new Promise((resolve, reject) => {
             if (!isSftpReady.value) {
-                console.warn(`[SFTP ${instanceSessionId}] Attempted to read file ${path} but SFTP is not ready.`);
-                return reject(new Error(t('fileManager.errors.sftpNotReady')));
+                const errMsg = t('fileManager.errors.sftpNotReady');
+                console.warn(`[SFTP ${instanceSessionId}] 尝试读取文件 ${path} 但 SFTP 未就绪。`); // 日志改为中文
+                uiNotificationsStore.showError(errMsg, { timeout: 5000 }); // 使用 uiNotificationsStore
+                return reject(new Error(errMsg));
             }
             const requestId = generateRequestId();
             let unregisterSuccess: (() => void) | null = null;
@@ -165,7 +169,9 @@ export function createSftpActionsManager(
             const timeoutId = setTimeout(() => {
                 unregisterSuccess?.();
                 unregisterError?.();
-                reject(new Error(t('fileManager.errors.readFileTimeout')));
+                const errMsg = t('fileManager.errors.readFileTimeout');
+                uiNotificationsStore.showError(errMsg, { timeout: 5000 }); // 使用 uiNotificationsStore
+                reject(new Error(errMsg));
             }, 20000); // 20 秒超时
 
             unregisterSuccess = onMessage('sftp:readfile:success', (payload: MessagePayload, message: WebSocketMessage) => {
@@ -186,7 +192,9 @@ export function createSftpActionsManager(
                     clearTimeout(timeoutId);
                     unregisterSuccess?.();
                     unregisterError?.();
-                    reject(new Error(errorPayload || 'Failed to read file'));
+                    const errorMsg = errorPayload || t('fileManager.errors.readFileFailed'); // 使用 i18n
+                    uiNotificationsStore.showError(`${t('fileManager.errors.readFileError')}: ${errorMsg}`, { timeout: 5000 }); // 使用 uiNotificationsStore
+                    reject(new Error(errorMsg));
                 }
             });
 
@@ -197,8 +205,10 @@ export function createSftpActionsManager(
      const writeFile = (path: string, content: string): Promise<void> => {
         return new Promise((resolve, reject) => {
             if (!isSftpReady.value) {
-                 console.warn(`[SFTP ${instanceSessionId}] Attempted to write file ${path} but SFTP is not ready.`);
-                return reject(new Error(t('fileManager.errors.sftpNotReady')));
+                 const errMsg = t('fileManager.errors.sftpNotReady');
+                 console.warn(`[SFTP ${instanceSessionId}] 尝试写入文件 ${path} 但 SFTP 未就绪。`); // 日志改为中文
+                 uiNotificationsStore.showError(errMsg, { timeout: 5000 }); // 使用 uiNotificationsStore
+                return reject(new Error(errMsg));
             }
             const requestId = generateRequestId();
             const encoding: 'utf8' | 'base64' = 'utf8'; // 假设总是 utf8
@@ -208,7 +218,9 @@ export function createSftpActionsManager(
             const timeoutId = setTimeout(() => {
                 unregisterSuccess?.();
                 unregisterError?.();
-                reject(new Error(t('fileManager.errors.saveTimeout')));
+                const errMsg = t('fileManager.errors.saveTimeout');
+                uiNotificationsStore.showError(errMsg, { timeout: 5000 }); // 使用 uiNotificationsStore
+                reject(new Error(errMsg));
             }, 20000); // 20 秒超时
 
             unregisterSuccess = onMessage('sftp:writefile:success', (payload: MessagePayload, message: WebSocketMessage) => {
@@ -227,7 +239,9 @@ export function createSftpActionsManager(
                     clearTimeout(timeoutId);
                     unregisterSuccess?.();
                     unregisterError?.();
-                    reject(new Error(errorPayload || 'Failed to write file'));
+                    const errorMsg = errorPayload || t('fileManager.errors.saveFailed'); // 使用 i18n
+                    uiNotificationsStore.showError(errorMsg, { timeout: 5000 }); // 使用 uiNotificationsStore
+                    reject(new Error(errorMsg));
                 }
             });
 
@@ -246,12 +260,12 @@ export function createSftpActionsManager(
         // 类型断言，因为我们知道 readdir:success 的 payload 是 FileListItem[]
         const fileListPayload = payload as FileListItem[];
         if (message.path === currentPathRef.value) {
-            console.log(`[SFTP ${instanceSessionId}] Received file list for ${message.path}`);
+            console.log(`[SFTP ${instanceSessionId}] 收到目录 ${message.path} 的文件列表`); // 日志改为中文
             fileList.value = fileListPayload.sort(sortFiles);
             isLoading.value = false;
-            error.value = null;
+            // error.value = null; // 不再需要
         } else {
-             console.log(`[SFTP ${instanceSessionId}] Ignoring readdir success for ${message.path} (current: ${currentPathRef.value})`);
+             console.log(`[SFTP ${instanceSessionId}] 忽略目录 ${message.path} 的 readdir 成功消息 (当前: ${currentPathRef.value})`); // 日志改为中文
         }
     };
 
@@ -259,16 +273,17 @@ export function createSftpActionsManager(
         // 类型断言，因为我们知道 readdir:error 的 payload 是 string
         const errorPayload = payload as string;
         if (message.path === currentPathRef.value) {
-            console.error(`[SFTP ${instanceSessionId}] Error loading directory ${message.path}:`, errorPayload);
-            error.value = errorPayload;
+            console.error(`[SFTP ${instanceSessionId}] 加载目录 ${message.path} 出错:`, errorPayload); // 日志改为中文
+            // error.value = errorPayload; // 使用通知
+            uiNotificationsStore.showError(`${t('fileManager.errors.loadDirectoryFailed')}: ${errorPayload}`, { timeout: 5000 }); // 使用 uiNotificationsStore, 添加 i18n key
             isLoading.value = false;
         }
     };
 
     const onActionSuccessRefresh = (payload: MessagePayload, message: WebSocketMessage) => {
-        console.log(`[SFTP ${instanceSessionId}] Action ${message.type} successful. Refreshing current directory: ${currentPathRef.value}`);
+        console.log(`[SFTP ${instanceSessionId}] 操作 ${message.type} 成功。正在刷新当前目录: ${currentPathRef.value}`); // 日志改为中文
         loadDirectory(currentPathRef.value);
-        error.value = null;
+        // error.value = null; // 不再需要
     };
 
     const onActionError = (payload: MessagePayload, message: WebSocketMessage) => {
@@ -284,7 +299,8 @@ export function createSftpActionsManager(
             'sftp:writefile:error': t('fileManager.errors.saveFailed'),
         };
         const prefix = actionTypeMap[message.type] || t('fileManager.errors.generic');
-        error.value = `${prefix}: ${errorPayload}`;
+        // error.value = `${prefix}: ${errorPayload}`; // 使用通知
+        uiNotificationsStore.showError(`${prefix}: ${errorPayload}`, { timeout: 5000 }); // 使用 uiNotificationsStore
     };
 
     // --- Register Handlers & Store Unregister Callbacks ---
@@ -309,7 +325,7 @@ export function createSftpActionsManager(
         // State
         fileList: readonly(fileList),
         isLoading: readonly(isLoading),
-        error: readonly(error),
+        // error: readonly(error), // 移除 error
 
         // Methods
         loadDirectory,
@@ -321,7 +337,7 @@ export function createSftpActionsManager(
         readFile,
         writeFile,
         joinPath, // 暴露辅助函数
-        clearSftpError,
+        // clearSftpError, // 移除 clearSftpError
 
         // Cleanup function
         currentPath: readonly(currentPathRef), // 暴露只读的当前路径 ref
diff --git a/packages/frontend/src/composables/useStatusMonitor.ts b/packages/frontend/src/composables/useStatusMonitor.ts
index a515181..3f2e235 100644
--- a/packages/frontend/src/composables/useStatusMonitor.ts
+++ b/packages/frontend/src/composables/useStatusMonitor.ts
@@ -91,9 +91,12 @@ export function createStatusMonitorManager(sessionId: string, wsDeps: StatusMoni
             unregisterAllStatusHandlers();
             // 连接断开时清除状态
             serverStatus.value = null;
-            statusError.value = '连接已断开'; // 或者使用 i18n
+            // 只有在之前连接成功的情况下才设置断开错误
+            if (oldValue === true) {
+                statusError.value = '连接已断开'; // 或者使用 i18n
+            }
         }
-    }, { immediate: true }); // immediate: true 确保初始状态下也会执行一次
+    }); // 移除 immediate: true，避免初始设置错误状态
 
     // --- 清理函数 ---
     const cleanup = () => {
diff --git a/packages/frontend/src/composables/useWebSocketConnection.ts b/packages/frontend/src/composables/useWebSocketConnection.ts
index 54caea7..f546088 100644
--- a/packages/frontend/src/composables/useWebSocketConnection.ts
+++ b/packages/frontend/src/composables/useWebSocketConnection.ts
@@ -1,5 +1,9 @@
 import { ref, shallowRef, computed, readonly } from 'vue';
-import type { ConnectionStatus, MessagePayload, WebSocketMessage, MessageHandler } from '../types/websocket.types';
+// 从 websocket.types.ts 导入并重新导出 ConnectionStatus
+import type { ConnectionStatus as WsConnectionStatusType, MessagePayload, WebSocketMessage, MessageHandler } from '../types/websocket.types';
+
+// 导出类型别名，以便其他模块可以使用
+export type WsConnectionStatus = WsConnectionStatusType;
 
 /**
  * 创建并管理单个 WebSocket 连接实例。
@@ -14,7 +18,7 @@ export function createWebSocketConnectionManager(sessionId: string, dbConnection
     // --- Instance State ---
     // 每个实例拥有独立的 WebSocket 对象、状态和消息处理器
     const ws = shallowRef<WebSocket | null>(null); // WebSocket 实例
-    const connectionStatus = ref<ConnectionStatus>('disconnected'); // 连接状态
+    const connectionStatus = ref<WsConnectionStatus>('disconnected'); // 连接状态 (使用导出的类型)
     const statusMessage = ref<string>(''); // 状态描述文本
     const isSftpReady = ref<boolean>(false); // SFTP 是否就绪
     const messageHandlers = new Map<string, Set<MessageHandler>>(); // 此实例的消息处理器注册表
diff --git a/packages/frontend/src/locales/en.json b/packages/frontend/src/locales/en.json
index 9661623..de76033 100644
--- a/packages/frontend/src/locales/en.json
+++ b/packages/frontend/src/locales/en.json
@@ -247,7 +247,12 @@
     "saving": "Saving",
     "saveSuccess": "Save successful",
     "saveError": "Save error",
-    "editPathTooltip": "Click path to edit"
+    "editPathTooltip": "Click path to edit",
+    "noActiveSession": "No active session",
+    "loadDirectoryFailed": "Failed to load directory"
+  },
+  "statusMonitor": {
+      "noActiveSession": "No active session"
   },
   "tags": {
     "title": "Tag Management",
@@ -506,5 +511,10 @@
         "SERVER_ERROR": "Server Error",
         "DATABASE_MIGRATION": "Database Migration"
     }
+  },
+  "workspaceConnectionList": {
+    "untagged": "Untagged",
+    "searchPlaceholder": "Search name or host...",
+    "noResults": "No connections found matching \"{searchTerm}\"."
   }
 }
diff --git a/packages/frontend/src/locales/zh.json b/packages/frontend/src/locales/zh.json
index 02053a9..a335f02 100644
--- a/packages/frontend/src/locales/zh.json
+++ b/packages/frontend/src/locales/zh.json
@@ -251,7 +251,11 @@
     "saving": "正在保存",
     "saveSuccess": "保存成功",
     "saveError": "保存出错",
-    "editPathTooltip": "点击路径进行编辑"
+    "editPathTooltip": "点击路径进行编辑",
+    "noActiveSession": "无活动会话"
+  },
+  "statusMonitor": {
+      "noActiveSession": "无活动会话"
   },
   "tags": {
     "title": "标签管理",
@@ -512,6 +516,8 @@
     }
   },
   "workspaceConnectionList": {
-    "untagged": "未标记"
+    "untagged": "未标记",
+    "searchPlaceholder": "搜索名称或主机...",
+    "noResults": "未找到匹配 \"{searchTerm}\" 的连接。"
   }
 }
diff --git a/packages/frontend/src/main.ts b/packages/frontend/src/main.ts
index 14b2f36..f6b9840 100644
--- a/packages/frontend/src/main.ts
+++ b/packages/frontend/src/main.ts
@@ -6,6 +6,10 @@ import router from './router'; // 引入我们创建的 router
 import i18n from './i18n'; // 引入 i18n 实例
 import { useSettingsStore } from './stores/settings.store'; // 引入 Settings Store
 import './style.css';
+// 导入 Font Awesome CSS
+import '@fortawesome/fontawesome-free/css/all.min.css';
+// 导入 splitpanes CSS
+import 'splitpanes/dist/splitpanes.css';
 
 const pinia = createPinia(); // 创建 Pinia 实例
 pinia.use(piniaPluginPersistedstate); // 使用持久化插件
diff --git a/packages/frontend/src/stores/session.store.ts b/packages/frontend/src/stores/session.store.ts
index 9837a1e..a1c4906 100644
--- a/packages/frontend/src/stores/session.store.ts
+++ b/packages/frontend/src/stores/session.store.ts
@@ -4,7 +4,8 @@ import { useI18n } from 'vue-i18n';
 import { useConnectionsStore, type ConnectionInfo } from './connections.store';
 
 // 导入管理器工厂函数 (用于创建实例)
-import { createWebSocketConnectionManager } from '../composables/useWebSocketConnection';
+// 导入 WsConnectionStatus 类型
+import { createWebSocketConnectionManager, type WsConnectionStatus } from '../composables/useWebSocketConnection';
 import { createSftpActionsManager, type WebSocketDependencies } from '../composables/useSftpActions';
 import { createSshTerminalManager, type SshTerminalDependencies } from '../composables/useSshTerminal';
 import { createStatusMonitorManager, type StatusMonitorDependencies } from '../composables/useStatusMonitor';
@@ -31,6 +32,14 @@ export interface SessionState {
   currentSftpPath: Ref<string>; // SFTP 当前路径 (可能需要保留在此处或移至 SftpManager 内部)
 }
 
+// 为标签栏定义包含状态的类型
+export interface SessionTabInfoWithStatus {
+  sessionId: string;
+  connectionName: string;
+  status: WsConnectionStatus; // 添加状态字段
+}
+
+
 export const useSessionStore = defineStore('session', () => {
   // --- 依赖 ---
   const { t } = useI18n();
@@ -49,6 +58,16 @@ export const useSessionStore = defineStore('session', () => {
     }));
   });
 
+  // 新增：包含状态的标签页信息
+  const sessionTabsWithStatus = computed((): SessionTabInfoWithStatus[] => {
+    return Array.from(sessions.value.values()).map(session => ({
+      sessionId: session.sessionId,
+      connectionName: session.connectionName,
+      status: session.wsManager.connectionStatus.value, // 从 wsManager 获取状态
+    }));
+  });
+
+
   const activeSession = computed((): SessionState | null => {
     if (!activeSessionId.value) return null;
     return sessions.value.get(activeSessionId.value) || null;
@@ -240,6 +259,7 @@ export const useSessionStore = defineStore('session', () => {
     activeSessionId,
     // Getters
     sessionTabs,
+    sessionTabsWithStatus, // 导出新的 getter
     activeSession,
     // Actions
     openNewSession,
diff --git a/packages/frontend/src/stores/uiNotifications.store.ts b/packages/frontend/src/stores/uiNotifications.store.ts
new file mode 100644
index 0000000..8e254fa
--- /dev/null
+++ b/packages/frontend/src/stores/uiNotifications.store.ts
@@ -0,0 +1,68 @@
+import { defineStore } from 'pinia';
+import { ref } from 'vue';
+
+// 定义通知对象的接口
+export interface UINotification {
+  id: number;
+  type: 'success' | 'error' | 'info' | 'warning';
+  message: string;
+  timeout?: number; // 可选的自动关闭超时时间 (毫秒)
+}
+
+export const useUiNotificationsStore = defineStore('uiNotifications', () => {
+  const notifications = ref<UINotification[]>([]);
+  let nextId = 0;
+
+  /**
+   * 添加一个新通知
+   * @param notification - 通知对象 (至少包含 type 和 message)
+   */
+  const addNotification = (notification: Omit<UINotification, 'id'>) => {
+    const id = nextId++;
+    const newNotification: UINotification = { ...notification, id };
+    notifications.value.push(newNotification);
+
+    // 如果设置了超时，则在超时后自动移除通知
+    if (notification.timeout) {
+      setTimeout(() => {
+        removeNotification(id);
+      }, notification.timeout);
+    }
+  };
+
+  /**
+   * 移除一个通知
+   * @param id - 要移除的通知的 ID
+   */
+  const removeNotification = (id: number) => {
+    notifications.value = notifications.value.filter(n => n.id !== id);
+  };
+
+  // 便捷方法
+  const showError = (message: string, options: { timeout?: number } = {}) => {
+    addNotification({ type: 'error', message, timeout: options.timeout ?? 5000 }); // 默认 5 秒超时
+  };
+
+  const showSuccess = (message: string, options: { timeout?: number } = {}) => {
+    addNotification({ type: 'success', message, timeout: options.timeout ?? 3000 }); // 默认 3 秒超时
+  };
+
+  const showInfo = (message: string, options: { timeout?: number } = {}) => {
+    addNotification({ type: 'info', message, timeout: options.timeout ?? 3000 });
+  };
+
+  const showWarning = (message: string, options: { timeout?: number } = {}) => {
+    addNotification({ type: 'warning', message, timeout: options.timeout ?? 5000 });
+  };
+
+
+  return {
+    notifications,
+    addNotification,
+    removeNotification,
+    showError,
+    showSuccess,
+    showInfo,
+    showWarning,
+  };
+});
diff --git a/packages/frontend/src/types/splitpanes.d.ts b/packages/frontend/src/types/splitpanes.d.ts
new file mode 100644
index 0000000..8ef7eb5
--- /dev/null
+++ b/packages/frontend/src/types/splitpanes.d.ts
@@ -0,0 +1,7 @@
+// packages/frontend/src/types/splitpanes.d.ts
+declare module 'splitpanes' {
+  import { DefineComponent } from 'vue';
+  const Splitpanes: DefineComponent<any, any, any>;
+  const Pane: DefineComponent<any, any, any>;
+  export { Splitpanes, Pane };
+}
diff --git a/packages/frontend/src/views/WorkspaceView.vue b/packages/frontend/src/views/WorkspaceView.vue
index a91a2fe..1155631 100644
--- a/packages/frontend/src/views/WorkspaceView.vue
+++ b/packages/frontend/src/views/WorkspaceView.vue
@@ -1,15 +1,17 @@
 <script setup lang="ts">
-import { onMounted, onBeforeUnmount, computed, ref } from 'vue'; // 移除不再需要的导入
+import { onMounted, onBeforeUnmount, computed, ref } from 'vue';
 import { useI18n } from 'vue-i18n';
-import { storeToRefs } from 'pinia'; // 导入 storeToRefs
+import { storeToRefs } from 'pinia';
 import TerminalComponent from '../components/Terminal.vue';
 import FileManagerComponent from '../components/FileManager.vue';
 import StatusMonitorComponent from '../components/StatusMonitor.vue';
 import WorkspaceConnectionListComponent from '../components/WorkspaceConnectionList.vue';
 import AddConnectionFormComponent from '../components/AddConnectionForm.vue';
 import TerminalTabBar from '../components/TerminalTabBar.vue';
-import { useSessionStore } from '../stores/session.store'; // 导入 Session Store
-import type { ConnectionInfo } from '../stores/connections.store'; // 保持 ConnectionInfo 类型导入
+import { useSessionStore, type SessionTabInfoWithStatus } from '../stores/session.store';
+import type { ConnectionInfo } from '../stores/connections.store';
+// 导入 splitpanes 组件
+import { Splitpanes, Pane } from 'splitpanes';
 // 导入管理器实例类型，用于 FileManagerComponent 的 prop 类型断言
 import type { SftpManagerInstance } from '../stores/session.store';
 
@@ -18,8 +20,7 @@ const { t } = useI18n();
 const sessionStore = useSessionStore();
 
 // --- 从 Store 获取响应式状态和 Getters ---
-// 使用 storeToRefs 保持响应性，或者直接在模板中使用 sessionStore.xxx
-const { sessionTabs, activeSessionId, activeSession } = storeToRefs(sessionStore);
+const { sessionTabsWithStatus, activeSessionId, activeSession } = storeToRefs(sessionStore);
 
 // --- UI 状态 (保持本地) ---
 const showAddEditForm = ref(false);
@@ -28,25 +29,13 @@ const connectionToEdit = ref<ConnectionInfo | null>(null);
 // --- 生命周期钩子 ---
 onMounted(() => {
   console.log('[工作区视图] 组件已挂载。');
-  // 可以在这里执行一些初始化操作，如果需要的话
 });
 
 onBeforeUnmount(() => {
   console.log('[工作区视图] 组件即将卸载，清理所有会话...');
-  sessionStore.cleanupAllSessions(); // 调用 store action 清理
+  sessionStore.cleanupAllSessions();
 });
 
-// --- 监听器 (如果需要监听 store 状态变化) ---
-// watch(activeSessionId, (newSessionId, oldSessionId) => {
-//     console.log(`[工作区视图] 活动会话 ID 从 ${oldSessionId} 更改为 ${newSessionId}`);
-//     if (newSessionId) {
-//         nextTick(() => {
-//             // TODO: 聚焦到活动会话的终端 (此逻辑可能移至 Store 或保留在此处)
-//             console.log(`[工作区视图] TODO: 聚焦会话 ${newSessionId} 的终端`);
-//         });
-//     }
-// });
-
 // --- 本地方法 (仅处理 UI 状态) ---
  const handleRequestAddConnection = () => {
    connectionToEdit.value = null;
@@ -72,102 +61,118 @@ onBeforeUnmount(() => {
    console.log('[工作区视图] 连接已更新');
    handleFormClose();
  };
-
- // --- 移除本地会话管理函数 ---
- // findConnectionInfo, openNewSession, activateSession, closeSession,
- // handleConnectRequest, handleOpenNewSession 已移至 sessionStore
-
- </script>
+</script>
 
 <template>
   <div class="workspace-view">
-    <!-- 标签栏: 绑定到 store 的状态和 actions -->
     <TerminalTabBar
-        :sessions="sessionTabs"
+        :sessions="sessionTabsWithStatus"
         :active-session-id="activeSessionId"
         @activate-session="sessionStore.activateSession"
         @close-session="sessionStore.closeSession"
     />
 
-    <div class="status-bar">
-      <!-- 状态栏显示活动会话的信息: 从 store getter 获取 -->
-      {{ t('workspace.statusBar', {
-           status: activeSession?.wsManager.statusMessage.value ?? t('workspace.status.disconnected'),
-           id: activeSession?.connectionId ?? t('workspace.noActiveSession')
-         })
-      }}
-      <!-- 从 activeSession getter 获取连接状态 -->
-      <span :class="`status-${activeSession?.wsManager.connectionStatus.value ?? 'disconnected'}`"></span>
-    </div>
     <div class="main-content-area">
-      <!-- 左侧边栏: 事件绑定到 store actions -->
-      <div class="left-sidebar">
-        <WorkspaceConnectionListComponent
-          @connect-request="sessionStore.handleConnectRequest"
-          @open-new-session="sessionStore.handleOpenNewSession"
-          @request-add-connection="handleRequestAddConnection"
-          @request-edit-connection="handleRequestEditConnection"
-        />
-      </div>
-      <!-- 主工作区容器 -->
-      <div class="main-workspace-container">
-        <!-- 会话区域: 循环 store 中的 sessions Map -->
-        <!-- 注意: v-for sessions.values() 可能不是响应式的，因为 sessions 是 shallowRef -->
-        <!-- 改为 v-for session in sessionTabs，然后通过 session.sessionId 获取完整 session -->
-        <div
-          v-for="tabInfo in sessionTabs"
-          :key="tabInfo.sessionId"
-          v-show="tabInfo.sessionId === activeSessionId"
-          class="main-workspace-area-session"
-        >
-          <!-- 获取当前循环的完整 session 对象 -->
-          <template v-if="sessionStore.sessions.get(tabInfo.sessionId)">
-            <div class="left-pane">
-              <div class="terminal-wrapper" :data-session-id="tabInfo.sessionId">
-                <!-- TerminalComponent: 事件绑定到 activeSession 的管理器方法 -->
-                <TerminalComponent
-                  :key="tabInfo.sessionId"
-                  :session-id="tabInfo.sessionId"
-                  :is-active="tabInfo.sessionId === activeSessionId"
-                  @ready="sessionStore.sessions.get(tabInfo.sessionId)?.terminalManager.handleTerminalReady"
-                  @data="sessionStore.sessions.get(tabInfo.sessionId)?.terminalManager.handleTerminalData"
-                  @resize="(dims) => { console.log(`[WorkspaceView ${tabInfo.sessionId}] Received resize event:`, dims); sessionStore.sessions.get(tabInfo.sessionId)?.terminalManager.handleTerminalResize(dims); }"
-                />
-              </div>
-              <div class="file-manager-wrapper">
-                <!-- FileManagerComponent: Props 绑定到 activeSession 的管理器 -->
-                <!-- 确保传递正确的 wsDeps -->
-                <FileManagerComponent
-                  :key="tabInfo.sessionId"
-                  :session-id="tabInfo.sessionId"
-                  :db-connection-id="sessionStore.sessions.get(tabInfo.sessionId)!.connectionId"
-                  :sftp-manager="sessionStore.sessions.get(tabInfo.sessionId)!.sftpManager"
-                  :ws-deps="{
-                    sendMessage: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.sendMessage,
-                    onMessage: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.onMessage,
-                    isConnected: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.isConnected,
-                    isSftpReady: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.isSftpReady
-                  }"
-                />
-              </div>
-            </div>
-            <div class="status-monitor-wrapper">
-              <!-- StatusMonitorComponent: Props 绑定到 activeSession 的管理器状态 -->
-              <StatusMonitorComponent
-                :key="tabInfo.sessionId"
-                :session-id="tabInfo.sessionId"
-                :server-status="(sessionStore.sessions.get(tabInfo.sessionId)?.statusMonitorManager.serverStatus.value) ?? null"
-                :status-error="(sessionStore.sessions.get(tabInfo.sessionId)?.statusMonitorManager.statusError.value) ?? null"
-              />
-            </div>
-          </template>
-        </div>
-        <!-- 占位符 -->
-        <div v-if="!activeSessionId" class="main-workspace-area placeholder">
-          <h2>{{ t('workspace.selectConnectionPrompt') }}</h2>
-          <p>{{ t('workspace.selectConnectionHint') }}</p>
-        </div>
-      </div>
+      <!-- 最外层：左右分割 (连接列表 | 中间区域 + 右侧区域) -->
+      <splitpanes class="default-theme" :horizontal="false" style="height: 100%">
+
+        <!-- 左侧边栏 Pane -->
+        <pane size="20" min-size="15" class="sidebar-pane">
+          <WorkspaceConnectionListComponent
+            @connect-request="sessionStore.handleConnectRequest"
+            @open-new-session="sessionStore.handleOpenNewSession"
+            @request-add-connection="handleRequestAddConnection"
+            @request-edit-connection="handleRequestEditConnection"
+          />
+        </pane>
+
+        <!-- 中间区域 Pane (包含终端和文件管理器) -->
+        <pane size="65" min-size="30">
+           <!-- 上下分割 (终端 | 文件管理器) -->
+           <splitpanes :horizontal="true" style="height: 100%">
+              <!-- 终端 Pane -->
+              <pane size="65" min-size="20" class="terminal-pane">
+                 <!-- 会话终端区域: 只渲染活动会话的终端 -->
+                 <div
+                   v-for="tabInfo in sessionTabsWithStatus"
+                   :key="tabInfo.sessionId"
+                   v-show="tabInfo.sessionId === activeSessionId"
+                   class="terminal-session-wrapper"
+                 >
+                   <!-- 移除 v-if，依赖外层 v-show 控制显隐 -->
+                   <!-- :key 绑定到 tabInfo.sessionId 保证每个会话对应唯一组件实例 -->
+                   <!-- :is-active 动态绑定 -->
+                   <TerminalComponent
+                     :key="tabInfo.sessionId"
+                      :session-id="tabInfo.sessionId"
+                      :is-active="tabInfo.sessionId === activeSessionId"
+                      @ready="sessionStore.sessions.get(tabInfo.sessionId)?.terminalManager.handleTerminalReady"
+                      @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>
+                 <!-- 终端占位符 -->
+                 <div v-if="!activeSessionId" class="terminal-placeholder">
+                   <h2>{{ t('workspace.selectConnectionPrompt') }}</h2>
+                   <p>{{ t('workspace.selectConnectionHint') }}</p>
+                 </div>
+                 <!-- 终端占位符 -->
+                 <div v-if="!activeSessionId" class="terminal-placeholder">
+                   <h2>{{ t('workspace.selectConnectionPrompt') }}</h2>
+                   <p>{{ t('workspace.selectConnectionHint') }}</p>
+                 </div>
+              </pane>
+              <!-- 文件管理器 Pane -->
+              <pane size="35" min-size="15" class="file-manager-pane">
+                 <!-- 为每个会话渲染文件管理器实例，用 v-show 控制 -->
+                 <div
+                   v-for="tabInfo in sessionTabsWithStatus"
+                   :key="tabInfo.sessionId + '-fm-wrapper'"
+                   v-show="tabInfo.sessionId === activeSessionId"
+                   class="file-manager-wrapper"
+                 >
+                   <FileManagerComponent
+                     v-if="sessionStore.sessions.get(tabInfo.sessionId)"
+                     :key="tabInfo.sessionId + '-fm'"
+                     :session-id="tabInfo.sessionId"
+                     :db-connection-id="sessionStore.sessions.get(tabInfo.sessionId)!.connectionId"
+                     :sftp-manager="sessionStore.sessions.get(tabInfo.sessionId)!.sftpManager"
+                     :ws-deps="{
+                       sendMessage: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.sendMessage,
+                       onMessage: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.onMessage,
+                       isConnected: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.isConnected,
+                       isSftpReady: sessionStore.sessions.get(tabInfo.sessionId)!.wsManager.isSftpReady
+                     }"
+                   />
+                 </div>
+                 <!-- 文件管理器占位符 -->
+                 <div v-if="!activeSessionId" class="pane-placeholder">{{ t('fileManager.noActiveSession') }}</div>
+              </pane>
+           </splitpanes>
+        </pane>
+
+        <!-- 右侧边栏 Pane (状态监视器) - 添加 status-monitor-pane 类 -->
+        <pane size="15" min-size="10" class="sidebar-pane status-monitor-pane">
+           <!-- 为每个会话渲染状态监视器实例，用 v-show 控制 -->
+           <div
+             v-for="tabInfo in sessionTabsWithStatus"
+             :key="tabInfo.sessionId + '-sm-wrapper'"
+             v-show="tabInfo.sessionId === activeSessionId"
+             class="status-monitor-wrapper"
+           >
+             <StatusMonitorComponent
+               v-if="sessionStore.sessions.get(tabInfo.sessionId)"
+               :key="tabInfo.sessionId + '-sm'"
+               :session-id="tabInfo.sessionId"
+               :server-status="sessionStore.sessions.get(tabInfo.sessionId)!.statusMonitorManager.serverStatus.value"
+               :status-error="sessionStore.sessions.get(tabInfo.sessionId)!.statusMonitorManager.statusError.value"
+             />
+           </div>
+           <!-- 状态监视器占位符 -->
+           <div v-if="!activeSessionId" class="pane-placeholder">{{ t('statusMonitor.noActiveSession') }}</div>
+        </pane>
+
+      </splitpanes>
     </div>
 
     <!-- 添加/编辑连接表单模态框 (保持不变) -->
@@ -185,23 +190,10 @@ onBeforeUnmount(() => {
 .workspace-view {
   display: flex;
   flex-direction: column;
-  height: calc(100vh - 60px - 30px - 60px - 2rem);
+  height: calc(100vh - 60px - 30px - 2rem); /* 调整以适应您的 header/footer/padding */
   overflow: hidden;
 }
 
-.status-bar {
-  padding: 0.5rem 1rem;
-  background-color: #eee;
-  border-bottom: 1px solid #ccc;
-  font-size: 0.9rem;
-  color: #333;
-}
-
-.status-connecting { color: orange; }
-.status-connected { color: green; }
-.status-disconnected { color: grey; }
-.status-error { color: red; }
-
 .main-content-area {
     display: flex;
     flex: 1;
@@ -209,65 +201,82 @@ onBeforeUnmount(() => {
     border-top: 1px solid #ccc;
 }
 
-.left-sidebar {
-    width: 250px;
-    min-width: 200px;
-    height: 100%;
-    border-right: 2px solid #ccc;
-    overflow-y: auto;
+/* 为 Pane 添加一些基本样式 */
+.sidebar-pane, /* 用于左右侧边栏 */
+.terminal-pane,
+.file-manager-pane {
+  display: flex;
+  flex-direction: column;
+  overflow: hidden; /* Pane 内部内容溢出时隐藏 */
+  background-color: #f8f9fa; /* 默认背景色 */
+}
+.terminal-pane {
+    background-color: #1e1e1e; /* 终端背景 */
+    position: relative; /* 保持相对定位用于占位符 */
+}
+.file-manager-pane {
+    border-top: 1px solid #ccc; /* 终端和文件管理器之间的分隔线 */
 }
 
-.main-workspace-container {
-    flex: 1;
-    display: flex;
-    overflow: hidden;
-    position: relative;
-}
-
-.main-workspace-area-session {
-    position: absolute;
-    top: 0;
-    left: 0;
-    right: 0;
-    bottom: 0;
-    display: flex;
-    overflow: hidden;
-}
-
-.left-pane {
-    flex: 1;
+/* 终端会话包装器 */
+.terminal-session-wrapper {
+    flex-grow: 1; /* 填充 terminal-pane */
     display: flex;
     flex-direction: column;
-    min-width: 300px;
-    overflow: hidden;
-}
-
-.terminal-wrapper {
-    flex: 1;
-    display: flex;
-    flex-direction: column;
-    background-color: #1e1e1e;
     overflow: hidden;
 }
 
+/* 文件管理器包装器 (内部组件应填充) */
 .file-manager-wrapper {
     flex: 1;
     display: flex;
     flex-direction: column;
-    border-top: 2px solid #ccc;
     overflow: hidden;
 }
 
-.status-monitor-wrapper {
-    width: 250px;
-    min-width: 200px;
-    border-left: 2px solid #ccc;
-    overflow: hidden;
+/* 文件管理器包装器 (内部组件应填充) */
+.file-manager-wrapper {
+    flex: 1;
     display: flex;
     flex-direction: column;
+    overflow: hidden;
 }
 
-.main-workspace-area.placeholder {
+/* 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 */
+    flex-direction: column;
+    overflow: hidden;
+}
+
+/* 新增：状态监视器 Pane 样式，使其内容居中 */
+.status-monitor-pane {
+    /* 尝试使用 flex 居中，如果 StatusMonitorComponent 本身是块级元素 */
+    /* display: flex; */
+    /* justify-content: center; */
+    /* align-items: center; */
+
+    /* 或者如果内容主要是文本，可以尝试 text-align */
+     text-align: center; /* 尝试文本居中 */
+     padding: 1rem; /* 添加一些内边距 */
+}
+.status-monitor-pane > .status-monitor-wrapper {
+    /* 如果需要包装器也居中（如果它不是 flex: 1 的话） */
+    /* margin: auto; */
+}
+
+
+/* 终端占位符 */
+.terminal-placeholder {
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+}
+
+
+/* 终端占位符 */
+.terminal-placeholder {
     position: absolute;
     top: 0;
     left: 0;
@@ -280,14 +289,68 @@ onBeforeUnmount(() => {
     text-align: center;
     color: #6c757d;
     padding: 2rem;
-    background-color: #f8f9fa;
+    background-color: #f8f9fa; /* 与 pane 背景一致 */
 }
-.main-workspace-area.placeholder h2 {
+.terminal-placeholder h2 {
     margin-bottom: 0.5rem;
     font-weight: 300;
     color: #495057;
 }
-.main-workspace-area.placeholder p {
+.terminal-placeholder p {
     font-size: 1em;
 }
+
+/* 面板占位符样式 */
+.pane-placeholder {
+    flex-grow: 1;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    text-align: center;
+    color: #adb5bd;
+    background-color: #f8f9fa;
+    font-size: 0.9em;
+    padding: 1rem;
+}
+
+/* Splitpanes 默认主题样式调整 */
+.splitpanes.default-theme .splitpanes__splitter {
+  background-color: #ccc;
+  box-sizing: border-box;
+  position: relative;
+  flex-shrink: 0;
+  border-left: 1px solid #eee; /* 可选：添加细微边框 */
+  border-right: 1px solid #eee;
+}
+.splitpanes--vertical > .splitpanes__splitter {
+  width: 7px; /* 垂直分割线宽度 */
+  cursor: col-resize;
+}
+.splitpanes--horizontal > .splitpanes__splitter {
+  height: 7px; /* 水平分割线高度 */
+  cursor: row-resize;
+}
+.splitpanes.default-theme .splitpanes__splitter:before {
+  content: '';
+  position: absolute;
+  left: 0;
+  top: 0;
+  transition: opacity 0.4s;
+  background-color: rgba(0, 0, 0, 0.15);
+  opacity: 0;
+  z-index: 1;
+}
+.splitpanes.default-theme .splitpanes__splitter:hover:before {
+  opacity: 1;
+}
+.splitpanes.default-theme.splitpanes--vertical > .splitpanes__splitter:before {
+  left: 2px; /* 调整指示器位置 */
+  right: 2px;
+  height: 100%;
+}
+.splitpanes.default-theme.splitpanes--horizontal > .splitpanes__splitter:before {
+  top: 2px; /* 调整指示器位置 */
+  bottom: 2px;
+  width: 100%;
+}
 </style>