Fix streaming pipeline: timestamps, buffer release, resolution, orientation

- Fix encoder PTS: use wall-clock relative timestamps to prevent backward
  jumps when transitioning from standby to game frames (MediaCodec drops)
- Suppress standby frames while game is active (500ms timeout) to prevent
  flickering between game video and color bars
- Remove standby color bar pattern, use plain dark background
- Fix vertical flip and BGR→RGB swizzle in composition base pass shader
- Pass buffer index through native pipeline for pool slot release callback
- Start engine for already-LIVE plans when APP_STREAMING mode is active
- Use texture pool dimensions for encoder resolution instead of hardcoded 1920x1080

app/src/main/java/com/omixlab/lckcontrol/service/LckControlService.kt

@@ -155,7 +155,19 @@ class LckControlService : Service() {
 
         override fun startStreamPlan(planId: String): Boolean = runBlocking {
             val plan = streamPlanRepository.getPlan(planId) ?: return@runBlocking false
-            if (plan.status == "LIVE") return@runBlocking true
+            if (plan.status == "LIVE") {
+                // Plan already LIVE — ensure streaming engine is running for APP_STREAMING
+                if (plan.executionMode == "APP_STREAMING" && !streamingManager.isStreaming()) {
+                    Log.d(TAG, "startStreamPlan: plan already LIVE but engine not running, starting engine")
+                    streamingManager.startStreaming(
+                        plan = plan,
+                        config = StreamingConfig(),
+                        width = 1920,
+                        height = 1080,
+                    )
+                }
+                return@runBlocking true
+            }
             if (plan.status != "READY") return@runBlocking false
             try {
                 streamPlanRepository.startPlan(planId)
@@ -278,6 +290,11 @@ class LckControlService : Service() {
                 )
             }
         }
+
+        // Forward buffer release events to AIDL callbacks
+        streamingManager.onBufferReleased = { bufferIndex ->
+            streamingServiceImpl?.broadcastBufferReleased(bufferIndex)
+        }
     }
 
     override fun onBind(intent: Intent?): IBinder? {