feat: 完善堡垒机与 Agent 智能运维能力

- 支持 Windows Agent 构建、安装脚本和统一上报协议

- 增强 RDP 剪贴板、虚拟盘和文件传输能力

- 新增 AIOps 上下文工具、告警 RCA trace 落库和回放接口

- 重构 docs 模块文档并补充终端、堡垒机、监控、AI Agent 设计

agent/collector/cpu_windows.go

@@ -0,0 +1,77 @@
+//go:build windows
+
+// Package collector 提供 Windows CPU 指标采集能力。 // Logan.Li
+package collector
+
+import (
+	"fmt"
+	"runtime"
+	"sync"
+	"syscall"
+	"unsafe"
+
+	"ezops/agent/model"
+)
+
+type filetime struct {
+	LowDateTime  uint32
+	HighDateTime uint32
+}
+
+type cpuSample struct {
+	total  uint64
+	idle   uint64
+	iowait uint64
+}
+
+type CPUCollector struct {
+	mu   sync.Mutex
+	prev *cpuSample
+}
+
+func NewCPUCollector() *CPUCollector {
+	return &CPUCollector{}
+}
+
+func (c *CPUCollector) Collect() (model.CPUStat, error) {
+	stat := model.CPUStat{CoreCount: runtime.NumCPU()}
+	cur, err := readCPUSample()
+	if err != nil {
+		return stat, fmt.Errorf("读取 Windows CPU 采样失败: %w", err)
+	}
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.prev != nil {
+		totalDelta := cur.total - c.prev.total
+		idleDelta := cur.idle - c.prev.idle
+		if totalDelta > 0 {
+			stat.UsagePercent = float64(totalDelta-idleDelta) / float64(totalDelta) * 100.0
+			if stat.UsagePercent < 0 {
+				stat.UsagePercent = 0
+			}
+		}
+	}
+	c.prev = &cur
+	return stat, nil
+}
+
+func readCPUSample() (cpuSample, error) {
+	var idle, kernel, user filetime
+	proc := syscall.NewLazyDLL("kernel32.dll").NewProc("GetSystemTimes")
+	ret, _, err := proc.Call(
+		uintptr(unsafe.Pointer(&idle)),
+		uintptr(unsafe.Pointer(&kernel)),
+		uintptr(unsafe.Pointer(&user)),
+	)
+	if ret == 0 {
+		return cpuSample{}, err
+	}
+	idleTicks := filetimeToUint64(idle)
+	kernelTicks := filetimeToUint64(kernel)
+	userTicks := filetimeToUint64(user)
+	return cpuSample{total: kernelTicks + userTicks, idle: idleTicks}, nil
+}
+
+func filetimeToUint64(ft filetime) uint64 {
+	return uint64(ft.HighDateTime)<<32 | uint64(ft.LowDateTime)
+}