feat: enhance image viewer navigation with tap animations and controls visibility

app/src/main/java/com/rosetta/messenger/MainActivity.kt

@@ -841,14 +841,14 @@ fun MainScreen(
             )
         }
 
-        // 🖼️ Image viewer state — disable swipe-back when photo is fullscreen
-        var isImageViewerOpen by remember { mutableStateOf(false) }
+        // 🔒 Lock swipe-back while chat overlays are open (image viewer/editor/media picker/camera).
+        var isChatSwipeLocked by remember { mutableStateOf(false) }
 
         SwipeBackContainer(
                 isVisible = selectedUser != null,
                 onBack = { popChatAndChildren() },
                 isDarkTheme = isDarkTheme,
-                swipeEnabled = !isImageViewerOpen
+                swipeEnabled = !isChatSwipeLocked
         ) {
             selectedUser?.let { currentChatUser ->
                 // Экран чата
@@ -870,7 +870,7 @@ fun MainScreen(
                         },
                         isDarkTheme = isDarkTheme,
                         avatarRepository = avatarRepository,
-                        onImageViewerChanged = { isOpen -> isImageViewerOpen = isOpen }
+                        onImageViewerChanged = { isLocked -> isChatSwipeLocked = isLocked }
                 )
             }
         }
@@ -928,7 +928,9 @@ fun MainScreen(
                         user = currentOtherUser,
                         isDarkTheme = isDarkTheme,
                         onBack = { navStack = navStack.filterNot { it is Screen.OtherProfile } },
-                        avatarRepository = avatarRepository
+                        avatarRepository = avatarRepository,
+                        currentUserPublicKey = accountPublicKey,
+                        currentUserPrivateKey = accountPrivateKey
                 )
             }
         }