refactor: rename EZOps → AIOps globally (brand unification)

backend/internal/api/handlers/webshell.go

@@ -236,7 +236,7 @@ func (h *WebShellHandler) Terminal(c *gin.Context) {
 	}
 
 	// 发送欢迎消息
-	welcome := "\r\n\x1b[32mEZOps WebShell\x1b[0m — 已连接 " + server.Hostname + " (" + server.IP + ")\r\n\r\n"
+	welcome := "\r\n\x1b[32mAIOps WebShell\x1b[0m — 已连接 " + server.Hostname + " (" + server.IP + ")\r\n\r\n"
 	conn.WriteJSON(WSMessage{
 		Status: 0,
 		Data:   welcome,