feat: protocol key/launch command layer — RemoteKeyCode maps, C-LAUNCH app launch, ADB digit keyevent fallback, PlaybackIntent protocol path

custom_components/nvidia_shield/ha_adb_common/adb_client.py

@@ -164,6 +164,16 @@ class AdbClientBase:
             return True
         return False
 
+    async def send_digit_keyevent(self, digit: str) -> bool:
+        """Send a channel digit via `input keyevent` (KEYCODE_0..9 = 7..16)."""
+        if not digit.isdigit() or len(digit) != 1:
+            _LOGGER.warning("Not a single digit: %s", digit)
+            return False
+        result = await self.shell(f"input keyevent {7 + int(digit)}")
+        if result is not None:
+            _LOGGER.debug("ADB digit keyevent %d (%s)", 7 + int(digit), digit)
+        return result is not None
+
     async def bring_to_foreground(self, package: str) -> bool:
         """Bring an app to the foreground using monkey command."""
         result = await self.shell(