немножко оптiмiзации и чистка кала за коки

lib/frontend/widgets/adaptive_shell.dart

@@ -1,3 +1,6 @@
+import 'dart:async';
+
+import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:material_symbols_icons/symbols.dart';
 import 'package:shared_preferences/shared_preferences.dart';
@@ -60,6 +63,12 @@ class _AdaptiveShellState extends State<AdaptiveShell> {
   }
 
   void _onChatSelected(DesktopChatSelection chat) {
+    if (chat.imageUrl.isNotEmpty) {
+      unawaited(precacheImage(
+        CachedNetworkImageProvider(chat.imageUrl, maxWidth: 144, maxHeight: 144),
+        context,
+      ));
+    }
     setState(() => _selected = chat);
   }
 
@@ -84,7 +93,7 @@ class _AdaptiveShellState extends State<AdaptiveShell> {
     return LayoutBuilder(
       builder: (context, constraints) {
         if (constraints.maxWidth < _breakpoint) {
-          return ChatListScreen(onChatSelected: _onChatSelected);
+          return const ChatListScreen();
         }
         final totalWidth = constraints.maxWidth;
         final effectiveListWidth = _listWidth.clamp(