refactor: 增强 systeminfo 插件并合并 envinfo

- systeminfo 新增网卡信息、权限检测、补丁数量、杀软检测、
  防火墙状态、敏感环境变量扫描等功能
- 合并 envinfo 到 systeminfo，删除独立的 envinfo 插件
- 修复本地插件通过 -m 指定时仍需 -h 参数的问题
- 通过回调机制解决 common/plugins 循环依赖

common/flag.go

@@ -15,6 +15,9 @@ import (
 // ErrShowHelp 表示用户请求显示帮助（正常退出）
 var ErrShowHelp = errors.New("show help requested")
 
+// IsLocalMode 由 plugins 包注册，判断 -m 指定的是否全是本地插件
+var IsLocalMode func(mode string) bool
+
 // Banner 显示程序横幅信息
 func Banner() {
 	// 静默模式下完全跳过Banner显示
@@ -272,9 +275,14 @@ func shouldShowHelp(Info *HostInfo, fv *FlagVars) bool {
 	// 检查是否提供了扫描目标
 	hasTarget := Info.Host != "" || fv.TargetURL != "" || fv.HostsFile != "" || fv.URLsFile != ""
 
-	// 本地模式需要指定插件才算有效目标
+	// 本地模式不需要目标主机
 	if fv.LocalPlugin != "" {
-		hasTarget = true
+		return false
+	}
+
+	// -m 指定的全是本地插件时也不需要目标
+	if IsLocalMode != nil && IsLocalMode(fv.ScanMode) {
+		return false
 	}
 
 	// 如果没有提供任何扫描目标，则显示帮助

common/i18n/locales/en.yaml

@@ -693,6 +693,28 @@ systeminfo_distro_exists:
   other: "Distribution: /etc/os-release exists"
 systeminfo_whoami:
   other: "Current User (whoami): {{.Arg1}}"
+systeminfo_iface:
+  other: "Interface {{.Arg1}}: {{.Arg2}} (MAC: {{.Arg3}})"
+systeminfo_privilege:
+  other: "Privilege Level: {{.Arg1}}"
+systeminfo_privilege_group:
+  other: "Admin Group: {{.Arg1}}"
+systeminfo_id_info:
+  other: "User Info: {{.Arg1}}"
+systeminfo_firewall:
+  other: "Firewall: {{.Arg1}}"
+systeminfo_firewall_rules:
+  other: "Firewall Rules: {{.Arg1}}"
+systeminfo_patches:
+  other: "Installed Patches: {{.Arg1}}"
+systeminfo_antivirus:
+  other: "Antivirus Detected: {{.Arg1}}"
+systeminfo_sudo:
+  other: "Sudo Privileges: {{.Arg1}}"
+systeminfo_macos_detail:
+  other: "macOS: {{.Arg1}}"
+systeminfo_sensitive_env:
+  other: "Sensitive Env Var: {{.Arg1}}={{.Arg2}}"
 
 # Windows scheduled task
 winschtask_success:

common/i18n/locales/zh.yaml

@@ -693,6 +693,28 @@ systeminfo_distro_exists:
   other: "发行版: /etc/os-release 存在"
 systeminfo_whoami:
   other: "当前用户(whoami): {{.Arg1}}"
+systeminfo_iface:
+  other: "网卡 {{.Arg1}}: {{.Arg2}} (MAC: {{.Arg3}})"
+systeminfo_privilege:
+  other: "权限级别: {{.Arg1}}"
+systeminfo_privilege_group:
+  other: "所属管理组: {{.Arg1}}"
+systeminfo_id_info:
+  other: "用户信息: {{.Arg1}}"
+systeminfo_firewall:
+  other: "防火墙: {{.Arg1}}"
+systeminfo_firewall_rules:
+  other: "防火墙规则数: {{.Arg1}}"
+systeminfo_patches:
+  other: "已安装补丁: {{.Arg1}}个"
+systeminfo_antivirus:
+  other: "检测到杀软: {{.Arg1}}"
+systeminfo_sudo:
+  other: "sudo权限: {{.Arg1}}"
+systeminfo_macos_detail:
+  other: "macOS: {{.Arg1}}"
+systeminfo_sensitive_env:
+  other: "敏感环境变量: {{.Arg1}}={{.Arg2}}"
 
 # Windows计划任务
 winschtask_success: