chore: initialize project workspace and install frontend dependencies

internal/scheduler/scheduler.go

@@ -0,0 +1,53 @@
+package scheduler
+
+import (
+	"log"
+
+	"github.com/robfig/cron/v3"
+
+	"nucleus/internal/db"
+	"nucleus/internal/models"
+	"nucleus/internal/runner"
+)
+
+var c *cron.Cron
+
+func InitScheduler() {
+	c = cron.New()
+	
+	// Load all targets
+	rows, err := db.DB.Query("SELECT id, name, address, schedule FROM targets")
+	if err != nil {
+		log.Fatal("Failed to load targets for scheduler:", err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var t models.Target
+		if err := rows.Scan(&t.ID, &t.Name, &t.Address, &t.Schedule); err != nil {
+			continue
+		}
+		
+		if t.Schedule != "" && t.Schedule != "manual" {
+			AddJob(t)
+		}
+	}
+
+	c.Start()
+	log.Println("Scheduler started successfully")
+}
+
+func AddJob(t models.Target) {
+	_, err := c.AddFunc(t.Schedule, func() {
+		log.Printf("Triggering scheduled scan for target %s (%s)", t.Name, t.Address)
+		runner.RunScan(t.ID, false)
+	})
+	if err != nil {
+		log.Printf("Failed to schedule target %s: %v", t.Name, err)
+	}
+}
+
+func ReloadScheduler() {
+	c.Stop()
+	InitScheduler()
+}