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.

android/build-apk.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+# AetherForge Android Agent APK — compile embedded agent + assembleDebug
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")" && pwd)"
+REPO_ROOT="$(cd "$ROOT/.." && pwd)"
+AGENT_DIR="$REPO_ROOT/agent"
+APP_DIR="$ROOT/agent-app"
+ASSETS_DIR="$APP_DIR/src/main/assets"
+AGENT_ASSET="$ASSETS_DIR/agent"
+CONFIG_ASSET="$ASSETS_DIR/config.json"
+BUILTIN_PATH="$AGENT_DIR/config/builtin.go"
+BUILTIN_BACKUP="$AGENT_DIR/config/builtin.go.android-bak"
+APK_OUT="$APP_DIR/build/outputs/apk/debug/aetherforge-agent.apk"
+
+SERVER_URL="${AETHERFORGE_SERVER_URL:-http://127.0.0.1:8989}"
+WORKER_NAME="${AETHERFORGE_WORKER_NAME:-android-fleet-node}"
+FLEET_SECRET="${AETHERFORGE_FLEET_SECRET:-}"
+BUILD_ID="${AETHERFORGE_BUILD_ID:-android-$(date +%Y%m%d-%H%M%S)}"
+
+restore_builtin() {
+  if [[ -f "$BUILTIN_BACKUP" ]]; then
+    mv -f "$BUILTIN_BACKUP" "$BUILTIN_PATH"
+  fi
+}
+trap restore_builtin EXIT
+
+command -v go >/dev/null 2>&1 || { echo "go compiler not found" >&2; exit 1; }
+
+echo "==> Baking config (server=$SERVER_URL worker=$WORKER_NAME)"
+pushd "$ROOT/forge" >/dev/null
+bake_args=(
+  run ./cmd/bake
+  -server "$SERVER_URL"
+  -worker "$WORKER_NAME"
+  -build-id "$BUILD_ID"
+  -config-out "$CONFIG_ASSET"
+  -builtin-out "$BUILTIN_PATH"
+)
+if [[ -n "$FLEET_SECRET" ]]; then
+  bake_args+=(-fleet-secret "$FLEET_SECRET")
+fi
+go "${bake_args[@]}"
+popd >/dev/null
+
+[[ -f "$BUILTIN_PATH" ]] && cp -f "$BUILTIN_PATH" "$BUILTIN_BACKUP"
+
+echo "==> Compiling linux/arm64 agent binary"
+(
+  cd "$AGENT_DIR"
+  GOOS=linux GOARCH=arm64 CGO_ENABLED=0 go build -trimpath -ldflags "-s -w" -o "$AGENT_ASSET" .
+)
+
+echo "    agent binary: $(wc -c <"$AGENT_ASSET") bytes -> $AGENT_ASSET"
+
+export ANDROID_HOME="${ANDROID_HOME:-${ANDROID_SDK_ROOT:-}}"
+if [[ -z "$ANDROID_HOME" ]]; then
+  echo "ANDROID_HOME (or ANDROID_SDK_ROOT) is required for Gradle assembleDebug" >&2
+  exit 1
+fi
+
+if [[ ! -x "$APP_DIR/gradlew" ]]; then
+  echo "Gradle wrapper missing. Run: cd android/agent-app && gradle wrapper" >&2
+  exit 1
+fi
+
+echo "==> Gradle assembleDebug"
+(
+  cd "$APP_DIR"
+  ./gradlew assembleDebug --no-daemon
+)
+
+[[ -f "$APK_OUT" ]] || { echo "APK not found at $APK_OUT" >&2; exit 1; }
+echo "==> APK ready: $APK_OUT"