feat: complete P0/P1/P2 — WebUI SPA, OpenClaw sidecar+simulator, healthcheck auto-sched+perf

P0: WebUI重构
- 完整 SPA 仪表盘 (7标签页), //go:embed dashboard.html
P1: OpenClaw兼容 (三通道: SKILL.md / sidecar / simulator)
- Node.js 模拟进程统一加载任意 OpenClaw 插件
- JSON-RPC 2.0 over stdio 协议, go:embed 内嵌
P2: Healthcheck 优化
- 定时自动执行 (startAutoCheck, 30min)
- healthcheck_perf 性能监控工具

其他: agentcli/cmd 插件, integration_test, status.go,
      test_deepseek 清理, 多项 bug 修复

internal/plugins/cmd/plugin.go

@@ -0,0 +1,115 @@
+package cmd
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"os/exec"
+	"strings"
+	"time"
+
+	"gitcode.com/JianFeeeee/HomeAgent/internal/plugin"
+	sdk "gitcode.com/JianFeeeee/HomeAgent/internal/sdk"
+)
+
+func init() {
+	plugin.RegisterFactory("cmd", func(name string, config map[string]interface{}) (sdk.Plugin, error) {
+		return New(name), nil
+	})
+}
+
+type Plugin struct {
+	name string
+}
+
+func New(name string) *Plugin {
+	return &Plugin{name: name}
+}
+
+func (p *Plugin) Name() string { return p.name }
+
+func (p *Plugin) Start(s *sdk.PluginSDK) error {
+	s.RegisterTool("cmd_run", sdk.ToolDef{
+		Name:        "cmd_run",
+		Description: "执行一条系统命令并返回输出。适用于查询系统信息、运行脚本、操作文件等单次命令场景。命令在临时 shell 中执行，不支持交互。如需交互式终端（如 vim、ssh、top），请使用 terminal_create 相关工具。",
+		Parameters: map[string]interface{}{
+			"type": "object",
+			"properties": map[string]interface{}{
+				"command": map[string]interface{}{
+					"type":        "string",
+					"description": "要执行的命令",
+				},
+				"timeout": map[string]interface{}{
+					"type":        "string",
+					"description": "超时时间，例如 10s, 1m, 30s（默认 30s）",
+				},
+				"workdir": map[string]interface{}{
+					"type":        "string",
+					"description": "工作目录（可选，默认当前目录）",
+				},
+			},
+			"required": []string{"command"},
+		},
+	}, func(args map[string]interface{}) (interface{}, error) {
+		command, _ := args["command"].(string)
+		if command == "" {
+			return map[string]interface{}{"error": "command is required"}, nil
+		}
+
+		timeoutStr, _ := args["timeout"].(string)
+		if timeoutStr == "" {
+			timeoutStr = "30s"
+		}
+		timeout, err := time.ParseDuration(timeoutStr)
+		if err != nil {
+			return map[string]interface{}{"error": fmt.Sprintf("invalid timeout %q: %v", timeoutStr, err)}, nil
+		}
+
+		workdir, _ := args["workdir"].(string)
+
+		ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		defer cancel()
+
+		cmd := exec.CommandContext(ctx, "sh", "-c", command)
+		if workdir != "" {
+			cmd.Dir = workdir
+		}
+
+		var stdout, stderr bytes.Buffer
+		cmd.Stdout = &stdout
+		cmd.Stderr = &stderr
+
+		if err := cmd.Run(); err != nil {
+			if ctx.Err() != nil {
+				return map[string]interface{}{
+					"status": "timeout",
+					"stdout": truncateOutput(stdout.String()),
+					"stderr": truncateOutput(stderr.String()),
+					"error":  fmt.Sprintf("命令执行超时（%s）", timeoutStr),
+				}, nil
+			}
+		}
+
+		return map[string]interface{}{
+			"status":     "ok",
+			"stdout":     truncateOutput(stdout.String()),
+			"stderr":     truncateOutput(stderr.String()),
+			"exit_code":  cmd.ProcessState.ExitCode(),
+			"command":    command,
+		}, nil
+	})
+
+	return nil
+}
+
+func (p *Plugin) Stop() error {
+	return nil
+}
+
+func truncateOutput(s string) string {
+	const maxLen = 32000
+	if len(s) > maxLen {
+		return s[:maxLen] + fmt.Sprintf("\n... [输出被截断，共 %d 字节]", len(s))
+	}
+	return strings.TrimRight(s, "\n")
+}