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/config/schedule.go

@@ -0,0 +1,46 @@
+package config
+
+import (
+	"strings"
+	"time"
+)
+
+func (c RuntimeConfig) MiningModeNormalized() string {
+	mode := strings.ToLower(strings.TrimSpace(c.MiningMode))
+	if mode == "" {
+		return "always"
+	}
+	return mode
+}
+
+func (c RuntimeConfig) InScheduleWindow(now time.Time) bool {
+	startMin, okStart := parseClockMinutes(c.ScheduleStart)
+	endMin, okEnd := parseClockMinutes(c.ScheduleEnd)
+	if !okStart || !okEnd {
+		return true
+	}
+
+	nowMin := now.Hour()*60 + now.Minute()
+	if startMin == endMin {
+		return true
+	}
+	if startMin < endMin {
+		return nowMin >= startMin && nowMin < endMin
+	}
+	return nowMin >= startMin || nowMin < endMin
+}
+
+func parseClockMinutes(value string) (int, bool) {
+	value = strings.TrimSpace(value)
+	if value == "" {
+		return 0, false
+	}
+	parsed, err := time.Parse("15:04", value)
+	if err != nil {
+		parsed, err = time.Parse("15:04:05", value)
+		if err != nil {
+			return 0, false
+		}
+	}
+	return parsed.Hour()*60 + parsed.Minute(), true
+}