android: remove chats bottom gap when tabs bar is hidden

android/CHANGELOG.md

@@ -505,3 +505,7 @@
   - removed extra outer paddings that shifted headers down/right on some pages,
   - separated content padding from top app bar container.
 - Result: consistent title baseline and horizontal alignment between main pages.
+
+### Step 81 - Chats bottom gap fix when tabs bar hidden
+- Fixed blank gap at the bottom of chats list when global tabs bar auto-hides on scroll.
+- Chats screen bottom padding is now dynamic and applied only while tabs bar is visible.

android/app/src/main/java/ru/daemonlord/messenger/ui/chats/ChatListScreen.kt

@@ -67,6 +67,7 @@ fun ChatListRoute(
     onOpenChat: (Long) -> Unit,
     inviteToken: String?,
     onInviteTokenConsumed: () -> Unit,
+    isMainBarVisible: Boolean,
     onMainBarVisibilityChanged: (Boolean) -> Unit,
     viewModel: ChatListViewModel = hiltViewModel(),
 ) {
@@ -90,6 +91,7 @@ fun ChatListRoute(
         onGlobalSearchChanged = viewModel::onGlobalSearchChanged,
         onRefresh = viewModel::onPullToRefresh,
         onOpenChat = onOpenChat,
+        isMainBarVisible = isMainBarVisible,
         onMainBarVisibilityChanged = onMainBarVisibilityChanged,
         onCreateGroup = viewModel::createGroup,
         onCreateChannel = viewModel::createChannel,
@@ -116,6 +118,7 @@ fun ChatListScreen(
     onGlobalSearchChanged: (String) -> Unit,
     onRefresh: () -> Unit,
     onOpenChat: (Long) -> Unit,
+    isMainBarVisible: Boolean,
     onMainBarVisibilityChanged: (Boolean) -> Unit,
     onCreateGroup: (String, List<Long>) -> Unit,
     onCreateChannel: (String, String, String?) -> Unit,
@@ -172,7 +175,7 @@ fun ChatListScreen(
             modifier = Modifier
                 .fillMaxSize()
                 .then(if (isTabletLayout) Modifier.widthIn(max = 820.dp) else Modifier)
-                .padding(bottom = 92.dp),
+                .padding(bottom = if (isMainBarVisible) 92.dp else 0.dp),
         ) {
         TopAppBar(
             title = { Text("Chats") },

android/app/src/main/java/ru/daemonlord/messenger/ui/navigation/AppNavGraph.kt

@@ -228,6 +228,7 @@ fun MessengerNavHost(
                     onOpenChat = { chatId ->
                         navController.navigate("${Routes.Chat}/$chatId")
                     },
+                    isMainBarVisible = isMainBarVisible,
                     onMainBarVisibilityChanged = { isMainBarVisible = it },
                 )
             }