Debug: 添加H3C接口输出调试日志

- 在解析器中输出display interface原始数据
- 便于诊断接口为空的问题

internal/ssh/client.go

@@ -193,44 +193,53 @@ func (c *Client) ExecuteCommand(command string) (string, error) {
 	
 	output := stdoutBuf.String()
 	
+	// 调试：输出原始输出长度和前100个字符
+	fmt.Printf("[SSH DEBUG] Raw output length: %d, first 100 chars: %q\n", len(output), output[:min(len(output), 100)])
+	
 	// 清理输出：移除命令回显和分页提示
 	lines := strings.Split(output, "\n")
 	var cleanLines []string
 	skipNext := false
 	for _, line := range lines {
-		line = strings.TrimSpace(line)
+		trimmedLine := strings.TrimSpace(line)
 		
 		// 跳过空行
-		if line == "" {
+		if trimmedLine == "" {
 			continue
 		}
 		
 		// 跳过分页提示
-		if strings.Contains(line, "---- More ----") {
+		if strings.Contains(trimmedLine, "---- More ----") {
 			continue
 		}
 		
-		// 跳过命令本身的回显
-		if line == command || line == "screen-length disable" {
+		// 跳过命令本身的回显（精确匹配）
+		if trimmedLine == strings.TrimSpace(command) || trimmedLine == "screen-length disable" {
 			skipNext = true
+			fmt.Printf("[SSH DEBUG] Skipping command echo: %s\n", trimmedLine)
 			continue
 		}
 		
 		// 跳过提示符行（如 <hostname> 或 [hostname]）
-		if regexp.MustCompile(`^[<\[]\S+[>\]]$`).MatchString(line) {
+		if regexp.MustCompile(`^[<\[]\S+[>\]]$`).MatchString(trimmedLine) {
+			fmt.Printf("[SSH DEBUG] Skipping prompt: %s\n", trimmedLine)
 			continue
 		}
 		
 		// 如果是 "screen-length disable" 后的第一行（通常是提示符），跳过
 		if skipNext {
 			skipNext = false
+			fmt.Printf("[SSH DEBUG] Skipping line after command: %s\n", trimmedLine)
 			continue
 		}
 		
-		cleanLines = append(cleanLines, line)
+		cleanLines = append(cleanLines, trimmedLine)
 	}
 	
-	return strings.Join(cleanLines, "\n"), nil
+	cleanOutput := strings.Join(cleanLines, "\n")
+	fmt.Printf("[SSH DEBUG] Clean output length: %d, first 100 chars: %q\n", len(cleanOutput), cleanOutput[:min(len(cleanOutput), 100)])
+	
+	return cleanOutput, nil
 }
 
 // ExecuteCommands 执行多个命令