diff --git a/src/main/java/com/sftp/manager/controller/FileController.java b/src/main/java/com/sftp/manager/controller/FileController.java
index 385cc9f..e15802c 100644
--- a/src/main/java/com/sftp/manager/controller/FileController.java
+++ b/src/main/java/com/sftp/manager/controller/FileController.java
@@ -55,7 +55,9 @@ public class FileController {
 
             return ApiResponse.success("查询成功", files);
         } catch (Exception e) {
-            return ApiResponse.error("列出文件失败: " + e.getMessage());
+            // SftpService 已抛出带「列出文件失败:」前缀的消息，此处不再重复拼接
+            String msg = e.getMessage();
+            return ApiResponse.error(msg != null ? msg : "列出文件失败");
         }
     }
 
diff --git a/src/main/resources/static/js/app.js b/src/main/resources/static/js/app.js
index d4b5b81..9bf8542 100644
--- a/src/main/resources/static/js/app.js
+++ b/src/main/resources/static/js/app.js
@@ -117,12 +117,16 @@ function loadFiles(panelId) {
     });
 }
 
-// 渲染文件列表
+// 渲染文件列表（仅当 data 为数组时渲染，避免错误数据结构被当成文件显示）
 function renderFileList(panelId, files) {
     const fileList = $(`#${panelId}-file-list`);
     fileList.empty();
 
-    if (!files || files.length === 0) {
+    if (!Array.isArray(files)) {
+        fileList.html('<div class="text-center text-danger p-3">数据格式错误，请刷新重试</div>');
+        return;
+    }
+    if (files.length === 0) {
         fileList.html('<div class="text-center text-muted p-3">文件夹为空</div>');
         return;
     }
@@ -439,7 +443,8 @@ function showConnectionStatus(panelId, sessionId) {
     statusDiv.show();
     if (sessionId && activeConnections[sessionId]) {
         const conn = activeConnections[sessionId];
-        updateConnectionStatus(panelId, 'connected', '已连接: ' + (conn.name || sessionId));
+        // 仅显示「已连接」，具体连接名由下拉框展示，避免与下拉框重复显示 IP/名称
+        updateConnectionStatus(panelId, 'connected', '已连接');
     } else {
         updateConnectionStatus(panelId, 'disconnected', '未连接');
     }
@@ -465,23 +470,53 @@ function loadActiveConnections() {
     });
 }
 
-// 更新连接下拉框
+// 更新连接下拉框（优先显示连接名或主机，避免暴露 sftp-uuid）
+// 重建选项后会恢复当前面板的选中值，保证左右面板可独立选择不同 SFTP 连接
 function updateConnectionSelect(panelId) {
     const select = $(`#${panelId}-connection`);
+    const currentSessionId = panelState[panelId] && panelState[panelId].sessionId;
+
     select.empty().append('<option value="">选择连接</option>');
 
     $.each(activeConnections, function(sessionId, conn) {
-        const name = (conn && conn.name) ? conn.name : sessionId;
+        const name = (conn && (conn.name || conn.host)) ? (conn.name || conn.host) : ('会话 ' + (sessionId || '').substring(0, 13));
         select.append('<option value="' + sessionId + '">' + $('<div>').text(name).html() + '</option>');
     });
+
+    // 恢复当前面板的选中连接，避免左右两侧被同步成同一个
+    if (currentSessionId && activeConnections[currentSessionId]) {
+        select.val(currentSessionId);
+    } else {
+        select.val('');
+    }
 }
 
-// 刷新面板
+// 刷新面板（先更新活跃连接，再加载左右面板文件，避免竞态和错误数据）
 function refreshPanels() {
-    loadActiveConnections();
-    loadFiles('left');
-    loadFiles('right');
-    updateStatus('已刷新');
+    $.ajax({
+        url: API_BASE + 'api/connection/active',
+        method: 'GET',
+        success: function(response) {
+            if (response.success && response.data) {
+                activeConnections = response.data;
+                updateConnectionSelect('left');
+                updateConnectionSelect('right');
+                ['left', 'right'].forEach(function(panelId) {
+                    if (panelState[panelId].mode === 'sftp') {
+                        showConnectionStatus(panelId, panelState[panelId].sessionId);
+                    }
+                });
+            }
+            loadFiles('left');
+            loadFiles('right');
+            updateStatus('已刷新');
+        },
+        error: function() {
+            loadFiles('left');
+            loadFiles('right');
+            updateStatus('已刷新');
+        }
+    });
 }
 
 // 切换是否展示隐藏文件
@@ -678,20 +713,16 @@ function updatePanelsAfterDisconnect(sessionId) {
     });
 }
 
-// 连接成功后更新面板状态与下拉框
+// 连接成功后只更新当前活动面板为新连接，另一侧保持原选择，便于左右选不同 SFTP
 function updatePanelStateWithConnection(sessionId, conn) {
-    if (panelState.left.mode === 'sftp') {
-        panelState.left.sessionId = sessionId;
-        $('#left-connection').val(sessionId);
-        initPanelPath('left');
-        showConnectionStatus('left', sessionId);
-    }
-    if (panelState.right.mode === 'sftp') {
-        panelState.right.sessionId = sessionId;
-        $('#right-connection').val(sessionId);
-        initPanelPath('right');
-        showConnectionStatus('right', sessionId);
+    const panelId = activePanelId;
+    if (panelState[panelId].mode === 'sftp') {
+        panelState[panelId].sessionId = sessionId;
+        $('#' + panelId + '-connection').val(sessionId);
+        initPanelPath(panelId);
+        showConnectionStatus(panelId, sessionId);
     }
+    // 另一侧保持原有连接选择不变
 }
 
 function showAddConnectionDialog() {