feat: init pc-monitor project

- Client: Go-based Windows hardware monitoring (CPU, GPU, memory, disk, network, power)
- Server: Go + Gin + SQLite backend with REST API
- Frontend: Vue 3 + Element Plus dashboard
- Docker deployment support
- Windows service installation script

server/model/metrics.go

@@ -0,0 +1,54 @@
+package model
+
+import "time"
+
+type Metrics struct {
+	DeviceID  string    `json:"device_id"`
+	Timestamp time.Time `json:"timestamp"`
+
+	// CPU
+	CPUUsage       float64   `json:"cpu_usage"`
+	CPUTemperature float64   `json:"cpu_temperature"`
+	CPUCoreUsage   []float64 `json:"cpu_core_usage"`
+
+	// Memory
+	MemoryTotal uint64  `json:"memory_total"`
+	MemoryUsed  uint64  `json:"memory_used"`
+	MemoryUsage float64 `json:"memory_usage"`
+
+	// GPU
+	GPUUsage       float64 `json:"gpu_usage"`
+	GPUTemperature float64 `json:"gpu_temperature"`
+	GPUMemoryTotal uint64  `json:"gpu_memory_total"`
+	GPUMemoryUsed  uint64  `json:"gpu_memory_used"`
+	GPUName        string  `json:"gpu_name"`
+
+	// Network
+	NetworkInterfaces []NetInterface `json:"network_interfaces"`
+
+	// Disk
+	Disks []DiskInfo `json:"disks"`
+
+	// Power
+	PowerStatus  string `json:"power_status"`
+	BatteryLevel int    `json:"battery_level"`
+	PowerSource  string `json:"power_source"`
+}
+
+type NetInterface struct {
+	Name       string `json:"name"`
+	MACAddress string `json:"mac_address"`
+	IPAddress  string `json:"ip_address"`
+	BytesSent  uint64 `json:"bytes_sent"`
+	BytesRecv  uint64 `json:"bytes_recv"`
+	Speed      uint64 `json:"speed"`
+	IsUp       bool   `json:"is_up"`
+}
+
+type DiskInfo struct {
+	MountPoint string  `json:"mount_point"`
+	Total      uint64  `json:"total"`
+	Used       uint64  `json:"used"`
+	Usage      float64 `json:"usage"`
+	FileSystem string  `json:"file_system"`
+}