chore: Adjust design

lib/pages/chat/chat_view.dart

@@ -164,7 +164,7 @@ class ChatView extends StatelessWidget {
             builder: (BuildContext context, snapshot) {
               return Scaffold(
                 appBar: AppBar(
-                  elevation: 4,
+                  elevation: 2,
                   actionsIconTheme: IconThemeData(
                     color: controller.selectedEvents.isEmpty
                         ? null

lib/pages/chat_list/chat_list_header.dart

@@ -36,7 +36,9 @@ class ChatListHeader extends StatelessWidget implements PreferredSizeWidget {
                   controller.selectedRoomIds.length.toString(),
                   key: const ValueKey(SelectMode.select),
                 )
-              : TextField(
+              : SizedBox(
+                  height: 44,
+                  child: TextField(
                     controller: controller.searchController,
                     textInputAction: TextInputAction.search,
                     onChanged: controller.onSearchEnter,
@@ -59,7 +61,8 @@ class ChatListHeader extends StatelessWidget implements PreferredSizeWidget {
                               onPressed: Scaffold.of(context).openDrawer,
                               icon: Icon(
                                 Icons.menu,
-                              color: Theme.of(context).colorScheme.onBackground,
+                                color:
+                                    Theme.of(context).colorScheme.onBackground,
                               ),
                             ),
                       suffixIcon: Row(
@@ -103,6 +106,7 @@ class ChatListHeader extends StatelessWidget implements PreferredSizeWidget {
                       ),
                     ),
                   ),
+                ),
       actions: selectMode == SelectMode.share
           ? null
           : selectMode == SelectMode.select

lib/pages/chat_list/chat_list_item.dart

@@ -157,9 +157,9 @@ class ChatListItem extends StatelessWidget {
         : 0.0;
     return Material(
       color: selected
-          ? Theme.of(context).primaryColor.withAlpha(100)
+          ? Theme.of(context).colorScheme.primaryContainer
           : activeChat
-              ? Theme.of(context).secondaryHeaderColor
+              ? Theme.of(context).colorScheme.secondaryContainer
               : Colors.transparent,
       child: ListTile(
         selected: selected || activeChat,