fix: restore media viewer swipe navigation

Let the gallery pager keep single-finger horizontal swipes for images.

Disable native PlayerView controls in the video viewer so video pages no longer steal paging gestures.

Switch the ChatScreen file-level Media3 marker to the correct UnstableApi annotation.

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt

@@ -1,4 +1,4 @@
-@file:OptIn(UnstableApi::class)
+@file:UnstableApi
 
 package ru.daemonlord.messenger.ui.chat
 
@@ -25,6 +25,8 @@ import androidx.compose.foundation.gestures.detectTransformGestures
 import androidx.compose.foundation.gestures.detectVerticalDragGestures
 import androidx.compose.foundation.gestures.awaitEachGesture
 import androidx.compose.foundation.gestures.awaitFirstDown
+import androidx.compose.foundation.gestures.calculatePan
+import androidx.compose.foundation.gestures.calculateZoom
 import androidx.compose.foundation.gestures.waitForUpOrCancellation
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.height
@@ -2331,14 +2333,30 @@ private fun ZoomableImageViewerPage(
     Box(
         modifier = Modifier
             .fillMaxSize()
-            .pointerInput(imageUrl) {
-                detectTransformGestures { _, pan, zoom, _ ->
-                    val nextScale = (scale * zoom).coerceIn(1f, 4f)
-                    scale = nextScale
-                    offset = if (nextScale <= 1.02f) {
-                        Offset.Zero
-                    } else {
-                        offset + pan
+            .pointerInput(imageUrl, scale) {
+                awaitEachGesture {
+                    awaitFirstDown(requireUnconsumed = false)
+                    var gestureHandled = false
+                    do {
+                        val event = awaitPointerEvent()
+                        val pointerCount = event.changes.count { it.pressed }
+                        val zoomChange = event.calculateZoom()
+                        val panChange = event.calculatePan()
+                        val shouldTransform = pointerCount > 1 || scale > 1.02f
+                        if (shouldTransform && (zoomChange != 1f || panChange != Offset.Zero)) {
+                            val nextScale = (scale * zoomChange).coerceIn(1f, 4f)
+                            scale = nextScale
+                            offset = if (nextScale <= 1.02f) {
+                                Offset.Zero
+                            } else {
+                                offset + panChange
+                            }
+                            event.changes.forEach { if (it.pressed) it.consume() }
+                            gestureHandled = true
+                        }
+                    } while (event.changes.any { it.pressed })
+                    if (!gestureHandled && scale <= 1.02f) {
+                        offset = Offset.Zero
                     }
                 }
             }
@@ -2439,10 +2457,8 @@ private fun VideoViewerPage(
         AndroidView(
             factory = { androidContext ->
                 PlayerView(androidContext).apply {
-                    useController = true
+                    useController = false
                     resizeMode = AspectRatioFrameLayout.RESIZE_MODE_FIT
-                    controllerAutoShow = true
-                    controllerHideOnTouch = false
                     player = playerState.player
                 }
             },