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/disk_windows.go

@@ -0,0 +1,52 @@
+//go:build windows
+
+// Package collector 提供 Windows 逻辑磁盘使用率采集能力。 // Logan.Li
+package collector
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+
+	"ezops/agent/model"
+)
+
+type DiskCollector struct{}
+
+func NewDiskCollector() *DiskCollector {
+	return &DiskCollector{}
+}
+
+func (d *DiskCollector) Collect() ([]model.DiskStat, error) {
+	mask, _, err := syscall.NewLazyDLL("kernel32.dll").NewProc("GetLogicalDrives").Call()
+	if mask == 0 {
+		return nil, fmt.Errorf("GetLogicalDrives 失败: %w", err)
+	}
+	var disks []model.DiskStat
+	for i := 0; i < 26; i++ {
+		if mask&(1<<uint(i)) == 0 {
+			continue
+		}
+		root := string(rune('A'+i)) + `:\`
+		var freeAvail, totalBytes, totalFree uint64
+		pathPtr, _ := syscall.UTF16PtrFromString(root)
+		ret, _, _ := syscall.NewLazyDLL("kernel32.dll").NewProc("GetDiskFreeSpaceExW").Call(
+			uintptr(unsafe.Pointer(pathPtr)),
+			uintptr(unsafe.Pointer(&freeAvail)),
+			uintptr(unsafe.Pointer(&totalBytes)),
+			uintptr(unsafe.Pointer(&totalFree)),
+		)
+		if ret == 0 || totalBytes == 0 {
+			continue
+		}
+		used := totalBytes - totalFree
+		disks = append(disks, model.DiskStat{
+			Mount:        root,
+			Device:       root,
+			TotalGB:      bytesToGB(totalBytes),
+			UsedGB:       bytesToGB(used),
+			UsagePercent: float64(used) / float64(totalBytes) * 100.0,
+		})
+	}
+	return disks, nil
+}