🎨 Optimized code structure, rename a lot of widgets

💄 Better large screen support in chat

lib/widgets/layouts/two_column.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:solian/widgets/empty.dart';
+
+class TwoColumnLayout extends StatelessWidget {
+  final Widget sideChild;
+  final Widget? mainChild;
+
+  const TwoColumnLayout({
+    super.key,
+    required this.sideChild,
+    required this.mainChild,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ScaffoldMessenger(
+      child: Scaffold(
+        body: Row(
+          children: [
+            SizedBox(
+              width: 400,
+              child: sideChild,
+            ),
+            const VerticalDivider(width: 0.3, thickness: 0.3),
+            Expanded(child: mainChild ?? const PageEmptyWidget()),
+          ],
+        ),
+      ),
+    );
+  }
+}