Fix NodeClient sharing between Activity and Service

- OpenClawApp now calls setContext() to enable file-based identity
- NodeService uses lazy delegate to get NodeClient from OpenClawApp
- This ensures both Activity and Service use the same device identity
- generateDeviceIdentity() now skips if context is null (avoids crash)

app/src/main/java/com/nexlab/openclaw/node/OpenClawApp.kt

@@ -18,6 +18,7 @@ class OpenClawApp : Application() {
         super.onCreate()
         // Initialize dependencies manually (without Hilt for NodeService)
         nodeClient = NodeClient()
+        nodeClient.setContext(this)  // Set context for file-based device identity
         settingsRepository = SettingsRepository(this)
     }
 }

app/src/main/java/com/nexlab/openclaw/node/data/remote/NodeClient.kt

@@ -79,12 +79,17 @@ class NodeClient() {
     }
 
     init {
-        // Generate device identity on initialization
-        // Note: setContext should be called after creation to enable persistence
-        generateDeviceIdentity()
+        // Don't generate identity here - wait for setContext to be called
+        // This ensures we have a valid context for file-based storage
     }
 
     private fun generateDeviceIdentity() {
+        // Skip if no context available (Activity not initialized yet)
+        if (context == null) {
+            Log.w(TAG, "No context available for device identity generation")
+            return
+        }
+        
         // Use a file instead of SharedPreferences to ensure it works across processes
         // SharedPreferences are not shared between processes by default
         val identityFile = context?.let { File(it.filesDir, "device_identity.json") }

app/src/main/java/com/nexlab/openclaw/node/service/NodeService.kt

@@ -29,8 +29,10 @@ private const val TAG = "NodeService"
 
 class NodeService : Service() {
 
-    // Initialize directly - not nullable
-    private val nodeClient = NodeClient()
+    // Get NodeClient from Application class to share device identity across processes
+    private val nodeClient: NodeClient by lazy {
+        (application as com.nexlab.openclaw.node.OpenClawApp).nodeClient
+    }
 
     private val CHANNEL_ID = "openclaw_node_channel"
     private val NOTIFICATION_ID = 1
@@ -56,8 +58,7 @@ class NodeService : Service() {
         createNotificationChannel()
         startForeground(NOTIFICATION_ID, createNotification())
         
-        // Initialize NodeClient with context for device identity persistence
-        nodeClient.setContext(this)
+        // NodeClient already has context from OpenClawApp - no need to set again
         
         // Debug: Write to file
         try {