feat: hide video controls on playback start

Video controls are now hidden by default when playback begins.
Users can tap to reveal them. Previously, controls were shown for
2 seconds before auto-hiding (TwoSecondController) or shown by
default (VideoViewInner).

https://claude.ai/code/session_01WpAqbodB5w8oDJpN6MLBs6

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/composable/VideoViewInner.kt

@@ -47,7 +47,7 @@ fun VideoViewInner(
     authorName: String? = null,
     nostrUriCallback: String? = null,
     automaticallyStartPlayback: Boolean,
-    controllerVisible: MutableState<Boolean> = mutableStateOf(true),
+    controllerVisible: MutableState<Boolean> = mutableStateOf(false),
     onZoom: (() -> Unit)? = null,
     accountViewModel: AccountViewModel,
 ) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/components/ZoomableContentView.kt

@@ -124,7 +124,6 @@ import okhttp3.coroutines.executeAsync
 import okio.sink
 import java.io.File
 import java.io.IOException
-import kotlin.time.Duration.Companion.seconds
 
 // Delay before cleaning up shared video temp files.
 // Allows time for receiving app to copy the file after user confirms share.
@@ -224,12 +223,7 @@ fun TwoSecondController(
     content: BaseMediaContent,
     inner: @Composable (controllerVisible: MutableState<Boolean>) -> Unit,
 ) {
-    val controllerVisible = remember(content) { mutableStateOf(true) }
-
-    LaunchedEffect(content) {
-        delay(2.seconds)
-        controllerVisible.value = false
-    }
+    val controllerVisible = remember(content) { mutableStateOf(false) }
 
     inner(controllerVisible)
 }