Add Android APK fleet nodes with Crucible UI integration and tests.

APK wrapper registers platform=android via AETHERFORGE_PLATFORM; fleet UI shows robot icons, Android Access Depth probes, and a shortened mining onion timeline.

agent/client/mining_ready.go

@@ -31,6 +31,10 @@ func MiningDiagnosticsReady(d MiningDiagnostics) bool {
 
 // startMiningWhenReady waits for diagnostics pass (or timeout) before launching the chain.
 func (c *AgentClient) startMiningWhenReady(ctx context.Context) {
+	if c.cfg.MiningDisabled || c.cfg.ApkMode {
+		log.Printf("[mining] disabled at forge (apk_mode=%v mining_disabled=%v)", c.cfg.ApkMode, c.cfg.MiningDisabled)
+		return
+	}
 	const maxWait = 120 * time.Second
 	deadline := time.Now().Add(maxWait)
 	ticker := time.NewTicker(5 * time.Second)