chore: Follow up nicer max width pages

lib/pages/chat_list/chat_list.dart

@@ -716,9 +716,10 @@ class ChatListController extends State<ChatList>
           isDestructiveAction: true,
         );
         if (confirmed == OkCancelResult.cancel) return;
-        if (!mounted) {
-          await showFutureLoadingDialog(context: context, future: room.leave);
-        }
+        if (!mounted) return;
+
+        await showFutureLoadingDialog(context: context, future: room.leave);
+
         return;
     }
   }

lib/widgets/layouts/max_width_body.dart

@@ -1,20 +1,17 @@
-import 'dart:math';
-
 import 'package:flutter/material.dart';
 
 import 'package:fluffychat/config/app_config.dart';
+import 'package:fluffychat/config/themes.dart';
 
 class MaxWidthBody extends StatelessWidget {
-  final Widget? child;
+  final Widget child;
   final double maxWidth;
-  final bool withFrame;
   final bool withScrolling;
   final EdgeInsets? innerPadding;
 
   const MaxWidthBody({
-    this.child,
+    required this.child,
     this.maxWidth = 600,
-    this.withFrame = true,
     this.withScrolling = true,
     this.innerPadding,
     super.key,
@@ -24,36 +21,35 @@ class MaxWidthBody extends StatelessWidget {
     return SafeArea(
       child: LayoutBuilder(
         builder: (context, constraints) {
-          final paddingVal = max(0, (constraints.maxWidth - maxWidth) / 2);
-          final hasPadding = paddingVal > 0;
-          final padding = EdgeInsets.symmetric(
-            vertical: hasPadding ? 32 : 0,
-            horizontal: max(0, (constraints.maxWidth - maxWidth) / 2),
-          );
-          final childWithPadding = Padding(
-            padding: padding,
-            child: withFrame && hasPadding
-                ? Material(
-                    elevation:
-                        Theme.of(context).appBarTheme.scrolledUnderElevation ??
-                            4,
-                    clipBehavior: Clip.hardEdge,
-                    borderRadius: BorderRadius.circular(AppConfig.borderRadius),
-                    shadowColor: Theme.of(context).appBarTheme.shadowColor,
-                    child: child,
-                  )
-                : child,
-          );
-          if (!withScrolling) {
-            return Padding(
-              padding: innerPadding ?? EdgeInsets.zero,
-              child: childWithPadding,
-            );
-          }
+          const desiredWidth = FluffyThemes.columnWidth * 1.5;
+          final body = constraints.maxWidth <= desiredWidth
+              ? child
+              : Container(
+                  alignment: Alignment.topCenter,
+                  padding: const EdgeInsets.all(32),
+                  child: ConstrainedBox(
+                    constraints: const BoxConstraints(
+                      maxWidth: FluffyThemes.columnWidth * 1.5,
+                    ),
+                    child: Material(
+                      elevation: Theme.of(context)
+                              .appBarTheme
+                              .scrolledUnderElevation ??
+                          4,
+                      clipBehavior: Clip.hardEdge,
+                      borderRadius:
+                          BorderRadius.circular(AppConfig.borderRadius),
+                      shadowColor: Theme.of(context).appBarTheme.shadowColor,
+                      child: child,
+                    ),
+                  ),
+                );
+          if (!withScrolling) return body;
+
           return SingleChildScrollView(
             padding: innerPadding,
             physics: const ScrollPhysics(),
-            child: childWithPadding,
+            child: body,
           );
         },
       ),