diff --git a/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/AgentService.kt b/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/AgentService.kt
index 96fcdbd..da5af61 100644
--- a/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/AgentService.kt
+++ b/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/AgentService.kt
@@ -47,11 +47,26 @@ class AgentService : Service() {
     }
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        // WICHTIG: Jeder startForegroundService()-Aufruf MUSS binnen ~5s mit
+        // startForeground() beantwortet werden — sonst crasht Android den Prozess
+        // (ForegroundServiceDidNotStartInTimeException). Der Projection-Intent kommt
+        // per startForegroundService, obwohl der Dienst schon laeuft -> hier IMMER
+        // zuerst startForeground aufrufen (idempotent).
+        startForeground(NOTIF_ID, buildNotification(status))
+
         if (intent?.action == ACTION_PROJECTION) {
             val code = intent.getIntExtra(EXTRA_RESULT_CODE, 0)
             @Suppress("DEPRECATION")
             val data = intent.getParcelableExtra<Intent>(EXTRA_RESULT_DATA)
-            if (code != 0 && data != null) ScreenCapturer.start(applicationContext, code, data)
+            if (code != 0 && data != null) {
+                try {
+                    ScreenCapturer.start(applicationContext, code, data)
+                    updateNotification("$status · Bildschirm-Zugriff aktiv")
+                } catch (e: Throwable) {
+                    ScreenCapturer.lastError = e.message ?: e.javaClass.simpleName
+                    updateNotification("Bildschirm-Fehler: ${ScreenCapturer.lastError}")
+                }
+            }
             if (rvs == null) startRvs()   // Dienst war frisch -> Verbindung nachziehen
             return START_STICKY
         }
diff --git a/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/RvsClient.kt b/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/RvsClient.kt
index 4597d7a..b1cd70d 100644
--- a/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/RvsClient.kt
+++ b/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/RvsClient.kt
@@ -147,9 +147,11 @@ class RvsClient(
 
     /** Bildschirmfoto — selber Vertrag wie der Desktop-Agent: {format,bytes,base64}. */
     private fun doScreenshot(): JSONObject {
-        if (!ScreenCapturer.active)
+        if (!ScreenCapturer.active) {
+            val why = ScreenCapturer.lastError?.let { " (letzter Fehler: $it)" } ?: ""
             return err("Bildschirm-Zugriff nicht erlaubt. In der Agent-App auf dem Handy " +
-                "einmalig 'Bildschirm-Zugriff erlauben' antippen.")
+                "einmalig 'Bildschirm-Zugriff erlauben' antippen.$why")
+        }
         val png = ScreenCapturer.capture()
             ?: return err("Screenshot fehlgeschlagen (kein Frame). Ist der Bildschirm an?")
         val b64 = android.util.Base64.encodeToString(png, android.util.Base64.NO_WRAP)
diff --git a/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/ScreenCapturer.kt b/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/ScreenCapturer.kt
index b4830d6..3cbaeee 100644
--- a/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/ScreenCapturer.kt
+++ b/host-agent/android/app/src/main/java/de/hackersoft/ariaagent/ScreenCapturer.kt
@@ -36,6 +36,10 @@ object ScreenCapturer {
     private var h = 0
     private var dpi = 0
 
+    /** Letzter Init-/Capture-Fehler (fuer die Fehlermeldung an ARIA). */
+    @Volatile
+    var lastError: String? = null
+
     val active: Boolean
         @Synchronized get() = projection != null
 
@@ -43,7 +47,10 @@ object ScreenCapturer {
     fun start(ctx: Context, resultCode: Int, data: Intent) {
         stop()
         val mpm = ctx.getSystemService(Context.MEDIA_PROJECTION_SERVICE) as MediaProjectionManager
-        val mp = mpm.getMediaProjection(resultCode, data) ?: return
+        val mp = mpm.getMediaProjection(resultCode, data) ?: run {
+            lastError = "getMediaProjection lieferte null"
+            return
+        }
 
         val metrics = DisplayMetrics()
         val wm = ctx.getSystemService(Context.WINDOW_SERVICE) as WindowManager
@@ -56,18 +63,22 @@ object ScreenCapturer {
         handlerThread = HandlerThread("aria-capture").also { it.start() }
         handler = Handler(handlerThread!!.looper)
 
+        // Ab Android 14 Pflicht VOR createVirtualDisplay; frueher unschaedlich.
         mp.registerCallback(object : MediaProjection.Callback() {
             override fun onStop() { stop() }
         }, handler)
 
         val ir = ImageReader.newInstance(w, h, PixelFormat.RGBA_8888, 2)
         reader = ir
+        // AUTO_MIRROR = Standard-Flag fuer MediaProjection-Capture (die Projection
+        // selbst autorisiert die Aufnahme, kein Sonderrecht noetig).
         vdisplay = mp.createVirtualDisplay(
             "aria-screen", w, h, dpi,
             DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
             ir.surface, null, handler,
         )
         projection = mp
+        lastError = null
     }
 
     @Synchronized