android: fix main tabs bar layout and content overlap

android/CHANGELOG.md

@@ -482,3 +482,8 @@
 - Implemented scroll-direction behavior for all 4 main pages:
   - hide panel on downward scroll,
   - show panel on upward scroll / at top.
+
+### Step 77 - Main tabs bar UX/layout fix
+- Replaced custom pill-row main bar with compact `NavigationBar` inside rounded container for stable 4-tab layout on small screens.
+- Added bottom content paddings for `Chats/Contacts/Settings/Profile` pages so content is not obscured by the floating main bar.
+- Raised chats management FAB offset to avoid overlap with the global bottom bar.

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

@@ -169,7 +169,8 @@ fun ChatListScreen(
         Column(
             modifier = Modifier
                 .fillMaxSize()
-                .then(if (isTabletLayout) Modifier.widthIn(max = 820.dp) else Modifier),
+                .then(if (isTabletLayout) Modifier.widthIn(max = 820.dp) else Modifier)
+                .padding(bottom = 92.dp),
         ) {
         TabRow(
             selectedTabIndex = if (state.selectedTab == ChatTab.ALL) 0 else 1,
@@ -318,7 +319,7 @@ fun ChatListScreen(
                 onClick = { managementExpanded = !managementExpanded },
                 modifier = Modifier
                     .align(Alignment.BottomEnd)
-                    .padding(end = 16.dp, bottom = 88.dp),
+                    .padding(end = 16.dp, bottom = 112.dp),
             ) {
                 Icon(
                     imageVector = if (managementExpanded) Icons.Filled.Close else Icons.Filled.Add,

android/app/src/main/java/ru/daemonlord/messenger/ui/contacts/ContactsScreen.kt

@@ -84,7 +84,7 @@ private fun ContactsScreen(
             modifier = Modifier
                 .fillMaxWidth()
                 .then(if (isTabletLayout) Modifier.widthIn(max = 820.dp) else Modifier)
-                .padding(16.dp),
+                .padding(start = 16.dp, top = 16.dp, end = 16.dp, bottom = 96.dp),
             verticalArrangement = Arrangement.spacedBy(12.dp),
         ) {
             Text(

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

@@ -8,9 +8,9 @@ import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.safeDrawing
 import androidx.compose.foundation.layout.padding
@@ -24,8 +24,9 @@ import androidx.compose.material.icons.filled.Settings
 import androidx.compose.material3.Icon
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.NavigationBar
+import androidx.compose.material3.NavigationBarItem
 import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
@@ -42,8 +43,7 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.core.content.ContextCompat
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.semantics.contentDescription
-import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavType
@@ -295,71 +295,47 @@ private fun MainBottomBar(
     onNavigate: (String) -> Unit,
 ) {
     Surface(
+        modifier = Modifier
+            .padding(horizontal = 12.dp)
+            .fillMaxWidth(),
         shape = CircleShape,
         color = MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.92f),
     ) {
-        androidx.compose.foundation.layout.Row(
-            modifier = Modifier.padding(horizontal = 12.dp, vertical = 8.dp),
-            horizontalArrangement = Arrangement.spacedBy(8.dp),
+        NavigationBar(
+            containerColor = androidx.compose.ui.graphics.Color.Transparent,
+            tonalElevation = 0.dp,
+            modifier = Modifier.padding(horizontal = 8.dp),
         ) {
-            MainTabPill(
-                label = "Chats",
+            NavigationBarItem(
                 selected = currentRoute == Routes.Chats,
-                icon = { Icon(Icons.AutoMirrored.Filled.Chat, contentDescription = null) },
                 onClick = { onNavigate(Routes.Chats) },
+                icon = { Icon(Icons.AutoMirrored.Filled.Chat, contentDescription = "Chats") },
+                label = {
+                    androidx.compose.material3.Text("Chats", maxLines = 1, overflow = TextOverflow.Ellipsis)
+                },
             )
-            MainTabPill(
-                label = "Contacts",
+            NavigationBarItem(
                 selected = currentRoute == Routes.Contacts,
-                icon = { Icon(Icons.Filled.Contacts, contentDescription = null) },
                 onClick = { onNavigate(Routes.Contacts) },
+                icon = { Icon(Icons.Filled.Contacts, contentDescription = "Contacts") },
+                label = {
+                    androidx.compose.material3.Text("Contacts", maxLines = 1, overflow = TextOverflow.Ellipsis)
+                },
             )
-            MainTabPill(
-                label = "Settings",
+            NavigationBarItem(
                 selected = currentRoute == Routes.Settings,
-                icon = { Icon(Icons.Filled.Settings, contentDescription = null) },
                 onClick = { onNavigate(Routes.Settings) },
+                icon = { Icon(Icons.Filled.Settings, contentDescription = "Settings") },
+                label = {
+                    androidx.compose.material3.Text("Settings", maxLines = 1, overflow = TextOverflow.Ellipsis)
+                },
             )
-            MainTabPill(
-                label = "Profile",
+            NavigationBarItem(
                 selected = currentRoute == Routes.Profile,
-                icon = { Icon(Icons.Filled.Person, contentDescription = null) },
                 onClick = { onNavigate(Routes.Profile) },
-            )
-        }
-    }
-}
-
-@Composable
-private fun MainTabPill(
-    label: String,
-    selected: Boolean,
-    icon: @Composable () -> Unit,
-    onClick: () -> Unit,
-) {
-    Surface(
-        shape = CircleShape,
-        color = if (selected) {
-            MaterialTheme.colorScheme.primaryContainer
-        } else {
-            MaterialTheme.colorScheme.surface
-        },
-        modifier = Modifier
-            .clickable(onClick = onClick)
-            .semantics { contentDescription = "$label tab" },
-    ) {
-        androidx.compose.foundation.layout.Row(
-            modifier = Modifier.padding(horizontal = 10.dp, vertical = 6.dp),
-            horizontalArrangement = Arrangement.spacedBy(6.dp),
-            verticalAlignment = Alignment.CenterVertically,
-        ) {
-            icon()
-            Text(
-                text = label,
-                color = if (selected) {
-                    MaterialTheme.colorScheme.onPrimaryContainer
-                } else {
-                    MaterialTheme.colorScheme.onSurface
+                icon = { Icon(Icons.Filled.Person, contentDescription = "Profile") },
+                label = {
+                    androidx.compose.material3.Text("Profile", maxLines = 1, overflow = TextOverflow.Ellipsis)
                 },
             )
         }

android/app/src/main/java/ru/daemonlord/messenger/ui/profile/ProfileScreen.kt

@@ -125,7 +125,7 @@ fun ProfileScreen(
                 .fillMaxWidth()
                 .then(if (isTabletLayout) Modifier.widthIn(max = 720.dp) else Modifier)
                 .verticalScroll(scrollState)
-                .padding(16.dp),
+                .padding(start = 16.dp, top = 16.dp, end = 16.dp, bottom = 96.dp),
             verticalArrangement = Arrangement.spacedBy(12.dp),
         ) {
         Text(

android/app/src/main/java/ru/daemonlord/messenger/ui/settings/SettingsScreen.kt

@@ -105,7 +105,7 @@ fun SettingsScreen(
                 .fillMaxWidth()
                 .then(if (isTabletLayout) Modifier.widthIn(max = 720.dp) else Modifier)
                 .verticalScroll(scrollState)
-                .padding(16.dp),
+                .padding(start = 16.dp, top = 16.dp, end = 16.dp, bottom = 96.dp),
             verticalArrangement = Arrangement.spacedBy(12.dp),
         ) {
         Text(