refactor: Remove FCM token dialog and related UI elements; streamline chat screen layout

app/src/main/java/com/rosetta/messenger/ui/chats/ChatsListScreen.kt

@@ -281,88 +281,6 @@ fun ChatsListScreen(
             containerColor = if (isDarkTheme) Color(0xFF212121) else Color.White
         )
     }
-    
-    // 🔔 FCM Token Dialog
-    if (showFcmDialog) {
-        val prefs = context.getSharedPreferences("rosetta_prefs", Context.MODE_PRIVATE)
-        val fcmToken = prefs.getString("fcm_token", "No token found") ?: "No token found"
-        val clipboardManager = androidx.compose.ui.platform.LocalClipboardManager.current
-        
-        AlertDialog(
-            onDismissRequest = { showFcmDialog = false },
-            title = { 
-                Text(
-                    "FCM Push Token",
-                    fontWeight = FontWeight.Bold,
-                    color = textColor
-                ) 
-            },
-            text = {
-                Column(
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .verticalScroll(rememberScrollState())
-                ) {
-                    Text(
-                        "Token:",
-                        fontSize = 12.sp,
-                        fontWeight = FontWeight.Bold,
-                        color = secondaryTextColor
-                    )
-                    Spacer(modifier = Modifier.height(4.dp))
-                    Text(
-                        fcmToken,
-                        fontSize = 11.sp,
-                        fontFamily = FontFamily.Monospace,
-                        color = textColor,
-                        modifier = Modifier
-                            .fillMaxWidth()
-                            .clip(RoundedCornerShape(8.dp))
-                            .background(if (isDarkTheme) Color(0xFF2A2A2A) else Color(0xFFF5F5F5))
-                            .padding(8.dp)
-                            .clickable {
-                                clipboardManager.setText(androidx.compose.ui.text.AnnotatedString(fcmToken))
-                                android.widget.Toast.makeText(context, "Token copied!", android.widget.Toast.LENGTH_SHORT).show()
-                            }
-                    )
-                    
-                    Spacer(modifier = Modifier.height(16.dp))
-                    
-                    Text(
-                        "Status:",
-                        fontSize = 12.sp,
-                        fontWeight = FontWeight.Bold,
-                        color = secondaryTextColor
-                    )
-                    Spacer(modifier = Modifier.height(4.dp))
-                    Text(
-                        if (fcmToken != "No token found") "✅ Token received" else "❌ Token not received",
-                        fontSize = 14.sp,
-                        color = if (fcmToken != "No token found") Color(0xFF4CAF50) else Color(0xFFF44336)
-                    )
-                    
-                    Spacer(modifier = Modifier.height(8.dp))
-                    
-                    Text(
-                        "📤 Token is sent to server after login (packet ID: 0x10)",
-                        fontSize = 12.sp,
-                        color = secondaryTextColor
-                    )
-                }
-            },
-            confirmButton = {
-                Button(
-                    onClick = { showFcmDialog = false },
-                    colors = ButtonDefaults.buttonColors(
-                        containerColor = PrimaryBlue
-                    )
-                ) {
-                    Text("Close", color = Color.White)
-                }
-            },
-            containerColor = if (isDarkTheme) Color(0xFF212121) else Color.White
-        )
-    }
 
     // Simple background
     Box(modifier = Modifier.fillMaxSize().background(backgroundColor)) {
@@ -735,15 +653,6 @@ fun ChatsListScreen(
                                         actions = {
                                             // Search only on main screen
                                             if (!showRequestsScreen) {
-                                                // 🔔 FCM Debug button
-                                                IconButton(onClick = { showFcmDialog = true }) {
-                                                    Icon(
-                                                            Icons.Default.Info,
-                                                            contentDescription = "FCM Token",
-                                                            tint = textColor
-                                                    )
-                                                }
-                                                
                                                 IconButton(
                                                         onClick = {
                                                             if (protocolState == ProtocolState.AUTHENTICATED) {