feat: Add navigation for contacts in MainScreen and update ProfileCard visibility

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

@@ -477,6 +477,9 @@ fun MainScreen(
                 onNewGroupClick = {
                     // TODO: Navigate to new group
                 },
+                onContactsClick = {
+                    // TODO: Navigate to contacts
+                },
                 onCallsClick = {
                     // TODO: Navigate to calls
                 },
@@ -648,9 +651,11 @@ fun MainScreen(
                         },
                         onLogout = onLogout,
                         onNavigateToTheme = {
+                            showProfileScreen = false
                             showThemeScreen = true
                         },
                         onNavigateToSafety = {
+                            showProfileScreen = false
                             showSafetyScreen = true
                         }
                 )

app/src/main/java/com/rosetta/messenger/ui/settings/OtherProfileScreen.kt

@@ -17,18 +17,15 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import com.rosetta.messenger.network.SearchUser
 
 @Composable
 fun OtherProfileScreen(
+    user: SearchUser,
     isDarkTheme: Boolean,
-    userName: String,
+    onBack: () -> Unit
-    userUsername: String,
-    userPublicKey: String,
-    isBlocked: Boolean,
-    onBack: () -> Unit,
-    onBlockUser: () -> Unit,
-    onUnblockUser: () -> Unit
 ) {
+    var isBlocked by remember { mutableStateOf(false) }
     val backgroundColor = if (isDarkTheme) Color(0xFF1A1A1A) else Color(0xFFFFFFFF)
     val surfaceColor = if (isDarkTheme) Color(0xFF2C2C2E) else Color(0xFFF2F2F7)
     val textColor = if (isDarkTheme) Color.White else Color.Black
@@ -42,9 +39,9 @@ fun OtherProfileScreen(
     ) {
         // Profile Card with avatar
         ProfileCard(
-            name = userName,
+            name = user.title.ifEmpty { "Unknown User" },
-            username = userUsername,
+            username = user.username.ifEmpty { "" },
-            publicKey = userPublicKey,
+            publicKey = user.publicKey,
             isDarkTheme = isDarkTheme,
             onBack = onBack,
             hasChanges = false,
@@ -55,7 +52,7 @@ fun OtherProfileScreen(
 
         Column(modifier = Modifier.padding(horizontal = 16.dp)) {
             // Username Section (if available)
-            if (userUsername.isNotBlank()) {
+            if (user.username.isNotBlank()) {
                 Text(
                     text = "Username",
                     fontSize = 14.sp,
@@ -76,7 +73,7 @@ fun OtherProfileScreen(
                         verticalAlignment = Alignment.CenterVertically
                     ) {
                         Text(
-                            text = "@$userUsername",
+                            text = "@${user.username}",
                             fontSize = 16.sp,
                             color = textColor,
                             modifier = Modifier.weight(1f)
@@ -126,7 +123,7 @@ fun OtherProfileScreen(
                     verticalAlignment = Alignment.CenterVertically
                 ) {
                     Text(
-                        text = userPublicKey.take(20) + "..." + userPublicKey.takeLast(20),
+                        text = user.publicKey.take(20) + "..." + user.publicKey.takeLast(20),
                         fontSize = 12.sp,
                         color = textColor,
                         modifier = Modifier.weight(1f)
@@ -167,7 +164,10 @@ fun OtherProfileScreen(
                             iconBackground = Color(0xFF2E7D32), // green
                             title = "Unblock User",
                             subtitle = "Allow this user to message you",
-                            onClick = onUnblockUser,
+                            onClick = {
+                                isBlocked = false
+                                // TODO: Implement actual unblock logic
+                            },
                             isDarkTheme = isDarkTheme,
                             hideChevron = true,
                             textColor = Color(0xFF2E7D32)
@@ -178,7 +178,10 @@ fun OtherProfileScreen(
                             iconBackground = Color(0xFFEF4444), // red
                             title = "Block this user",
                             subtitle = "Prevent this user from messaging you",
-                            onClick = onBlockUser,
+                            onClick = {
+                                isBlocked = true
+                                // TODO: Implement actual block logic
+                            },
                             isDarkTheme = isDarkTheme,
                             hideChevron = true,
                             textColor = Color(0xFFEF4444)

app/src/main/java/com/rosetta/messenger/ui/settings/ProfileScreen.kt

@@ -121,27 +121,31 @@ fun ProfileScreen(
         hasChanges = editedName != accountName || editedUsername != accountUsername
     }
 
-    Column(
+    Box(
         modifier = Modifier
             .fillMaxSize()
             .background(backgroundColor)
-            .verticalScroll(rememberScrollState())
     ) {
-        // ═════════════════════════════════════════════════════════════
+        Column(
-        // 👤 PROFILE CARD with colored header
+            modifier = Modifier
-        // ═════════════════════════════════════════════════════════════
+                .fillMaxSize()
-        ProfileCard(
+                .verticalScroll(rememberScrollState())
-            name = editedName.ifBlank { accountPublicKey.take(10) },
+        ) {
-            username = editedUsername,
+            // ═════════════════════════════════════════════════════════════
-            publicKey = accountPublicKey,
+            // 👤 PROFILE CARD with colored header
-            isDarkTheme = isDarkTheme,
+            // ═════════════════════════════════════════════════════════════
-            onBack = onBack,
+            ProfileCard(
-            hasChanges = hasChanges,
+                name = editedName.ifBlank { accountPublicKey.take(10) },
-            onSave = {
+                username = editedUsername,
-                onSaveProfile(editedName, editedUsername)
+                publicKey = accountPublicKey,
-                hasChanges = false
+                isDarkTheme = isDarkTheme,
-            }
+                onBack = null, // Кнопка назад будет снаружи
-        )
+                hasChanges = hasChanges,
+                onSave = {
+                    onSaveProfile(editedName, editedUsername)
+                    hasChanges = false
+                }
+            )
 
             Spacer(modifier = Modifier.height(16.dp))
 
@@ -270,6 +274,44 @@ fun ProfileScreen(
             )
 
             Spacer(modifier = Modifier.height(32.dp))
+        }
+
+        // Fixed back button at top
+        IconButton(
+            onClick = onBack,
+            modifier = Modifier
+                .align(Alignment.TopStart)
+                .statusBarsPadding()
+                .padding(4.dp)
+        ) {
+            Icon(
+                imageVector = Icons.Filled.ArrowBack,
+                contentDescription = "Back",
+                tint = Color.White
+            )
+        }
+
+        // Fixed save button (if changes)
+        AnimatedVisibility(
+            visible = hasChanges,
+            enter = fadeIn() + expandHorizontally(),
+            exit = fadeOut() + shrinkHorizontally(),
+            modifier = Modifier
+                .align(Alignment.TopEnd)
+                .statusBarsPadding()
+                .padding(4.dp)
+        ) {
+            TextButton(onClick = {
+                onSaveProfile(editedName, editedUsername)
+                hasChanges = false
+            }) {
+                Text(
+                    text = "Save",
+                    color = Color.White,
+                    fontWeight = FontWeight.SemiBold
+                )
+            }
+        }
     }
 }
 
@@ -277,12 +319,12 @@ fun ProfileScreen(
 // 📦 PROFILE CARD COMPONENT - Large Avatar Telegram Style
 // ═════════════════════════════════════════════════════════════
 @Composable
-private fun ProfileCard(
+fun ProfileCard(
     name: String,
     username: String,
     publicKey: String,
     isDarkTheme: Boolean,
-    onBack: () -> Unit,
+    onBack: (() -> Unit)?,
     hasChanges: Boolean,
     onSave: () -> Unit
 ) {
@@ -292,20 +334,21 @@ private fun ProfileCard(
         modifier = Modifier
             .fillMaxWidth()
             .background(avatarColors.backgroundColor)
-            .statusBarsPadding()
     ) {
-        // Back button
+        // Back button (if callback provided)
-        IconButton(
+        if (onBack != null) {
-            onClick = onBack,
+            IconButton(
-            modifier = Modifier
+                onClick = onBack,
-                .align(Alignment.TopStart)
+                modifier = Modifier
-                .padding(4.dp)
+                    .align(Alignment.TopStart)
-        ) {
+                    .padding(4.dp)
-            Icon(
+            ) {
-                imageVector = Icons.Filled.ArrowBack,
+                Icon(
-                contentDescription = "Back",
+                    imageVector = Icons.Filled.ArrowBack,
-                tint = Color.White
+                    contentDescription = "Back",
-            )
+                    tint = Color.White
+                )
+            }
         }
         
         // Save button (if changes)

app/src/main/java/com/rosetta/messenger/ui/settings/ThemeScreen.kt

@@ -33,21 +33,9 @@ fun ThemeScreen(
     onBack: () -> Unit,
     onThemeChange: (Boolean) -> Unit
 ) {
-    val backgroundColor by animateColorAsState(
+    val backgroundColor = if (isDarkTheme) Color(0xFF1A1A1A) else Color(0xFFFFFFFF)
-        targetValue = if (isDarkTheme) Color(0xFF1A1A1A) else Color(0xFFFFFFFF),
+    val surfaceColor = if (isDarkTheme) Color(0xFF2C2C2E) else Color(0xFFF2F2F7)
-        animationSpec = tween(300),
+    val textColor = if (isDarkTheme) Color.White else Color.Black
-        label = "backgroundColor"
-    )
-    val surfaceColor by animateColorAsState(
-        targetValue = if (isDarkTheme) Color(0xFF2C2C2E) else Color(0xFFF2F2F7),
-        animationSpec = tween(300),
-        label = "surfaceColor"
-    )
-    val textColor by animateColorAsState(
-        targetValue = if (isDarkTheme) Color.White else Color.Black,
-        animationSpec = tween(300),
-        label = "textColor"
-    )
     val secondaryTextColor = if (isDarkTheme) Color(0xFF8E8E93) else Color(0xFF666666)
     
     // Theme mode: "light", "dark", "auto"