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/api/router.go

@@ -0,0 +1,57 @@
+package api
+
+import (
+	"pc-monitor-server/api/handler"
+	"pc-monitor-server/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+func SetupRouter(deviceService *service.DeviceService, metricsService *service.MetricsService, alertService *service.AlertService) *gin.Engine {
+	r := gin.Default()
+
+	r.Use(corsMiddleware())
+
+	api := r.Group("/api/v1")
+	{
+		deviceHandler := handler.NewDeviceHandler(deviceService)
+		metricsHandler := handler.NewMetricsHandler(metricsService)
+		alertHandler := handler.NewAlertHandler(alertService)
+
+		// Device endpoints
+		api.POST("/register", deviceHandler.Register)
+		api.GET("/devices", deviceHandler.GetAll)
+		api.GET("/devices/:id", deviceHandler.GetByID)
+		api.DELETE("/devices/:id", deviceHandler.Delete)
+		api.POST("/devices/:id/heartbeat", deviceHandler.Heartbeat)
+
+		// Metrics endpoints
+		api.POST("/report", metricsHandler.Report)
+		api.GET("/devices/:id/metrics/latest", metricsHandler.GetLatest)
+		api.GET("/devices/:id/metrics/history", metricsHandler.GetHistory)
+
+		// Alert endpoints
+		api.GET("/alerts", alertHandler.GetActiveAlerts)
+		api.POST("/alerts/rules", alertHandler.CreateRule)
+		api.GET("/devices/:id/alerts/rules", alertHandler.GetRulesByDevice)
+		api.DELETE("/alerts/rules/:id", alertHandler.DeleteRule)
+		api.POST("/alerts/:id/resolve", alertHandler.ResolveAlert)
+	}
+
+	return r
+}
+
+func corsMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(204)
+			return
+		}
+
+		c.Next()
+	}
+}