fix(frontend): 修复文件管理器删除与上传稳定性

补齐文件管理器右键子菜单点击展开，新增拖拽上传目标确认，
并在上传完成后自动刷新当前可见目录

目录删除改为区分仅删空目录与强制递归删除，删除后自动回退
失效路径，避免文件树持续报 No such file

同步后端 sftp:rmdir 的 recursive 分支，并将关于页与版本检查
默认仓库链接切换到 Micah123321/nexus-terminal

packages/backend/src/sftp/sftp.service.ts

@@ -489,16 +489,40 @@ export class SftpService {
         }
     }
 
-    /** 删除目录 (强制递归) */
-    async rmdir(sessionId: string, path: string, requestId: string): Promise<void> {
+    /** 删除目录 */
+    async rmdir(sessionId: string, path: string, requestId: string, recursive = true): Promise<void> {
         const state = this.clientStates.get(sessionId);
-        if (!state || !state.sshClient) { 
-            console.warn(`[SSH Exec] SSH 客户端未准备好，无法在 ${sessionId} 上执行 rmdir (ID: ${requestId})`);
+        if (!state || (!state.sshClient && recursive) || (!state.sftp && !recursive)) { 
+            console.warn(`[SSH Exec] 会话未准备好，无法在 ${sessionId} 上执行 rmdir (ID: ${requestId})`);
             state?.ws.send(JSON.stringify({ type: 'sftp:rmdir:error', path: path, payload: 'SSH 会话未就绪', requestId: requestId }));
             return;
         }
         console.debug(`[SSH Exec ${sessionId}] Received rmdir request for ${path} (ID: ${requestId})`);
 
+        if (!recursive) {
+            const sftp = state.sftp;
+            if (!sftp) {
+                state.ws.send(JSON.stringify({ type: 'sftp:rmdir:error', path: path, payload: 'SFTP 会话未就绪', requestId: requestId }));
+                return;
+            }
+
+            try {
+                sftp.rmdir(path, (err) => {
+                    if (err) {
+                        console.error(`[SFTP ${sessionId}] rmdir ${path} failed (ID: ${requestId}):`, err);
+                        state.ws.send(JSON.stringify({ type: 'sftp:rmdir:error', path: path, payload: `删除目录失败: ${err.message}`, requestId: requestId }));
+                    } else {
+                        console.log(`[SFTP ${sessionId}] rmdir ${path} success (ID: ${requestId})`);
+                        state.ws.send(JSON.stringify({ type: 'sftp:rmdir:success', path: path, requestId: requestId }));
+                    }
+                });
+            } catch (error: any) {
+                console.error(`[SFTP ${sessionId}] rmdir ${path} caught unexpected error (ID: ${requestId}):`, error);
+                state.ws.send(JSON.stringify({ type: 'sftp:rmdir:error', path: path, payload: `删除目录失败: ${error.message}`, requestId: requestId }));
+            }
+            return;
+        }
+
         // 第一种方案：尝试 rm -rf 命令
         const tryRmRfCommand = async (isSudo: boolean) => {
             const commandPrefix = isSudo ? 'sudo ' : '';

packages/backend/src/websocket/handlers/sftp.handler.ts

@@ -57,7 +57,7 @@ export async function handleSftpOperation(
                  else throw new Error("Missing 'path' in payload for mkdir");
                  break;
             case 'sftp:rmdir':
-                 if (payload?.path) sftpService.rmdir(sessionId, payload.path, requestId);
+                 if (payload?.path) sftpService.rmdir(sessionId, payload.path, requestId, payload?.recursive !== false);
                  else throw new Error("Missing 'path' in payload for rmdir");
                  break;
             case 'sftp:unlink':
@@ -169,4 +169,4 @@ export function handleSftpUploadCancel(ws: AuthenticatedWebSocket, payload: any)
         return;
     }
     sftpService.cancelUpload(sessionId, payload.uploadId);
-}
+}