refactor: enhance search field styling in ChatsDrawer

- Wrapped the TextField in a Material widget to improve styling and ensure proper background handling.
- Added TextDecoration.none to various text styles to remove underlines, enhancing visual consistency.
- Updated the search field's input decoration for better alignment with the app's theme and design standards.

lib/features/navigation/widgets/chats_drawer.dart

@@ -178,7 +178,9 @@ class _ChatsDrawerState extends ConsumerState<ChatsDrawer> {
 
   Widget _buildSearchField(BuildContext context) {
     final theme = context.conduitTheme;
-    return TextField(
+    return Material(
+      color: Colors.transparent,
+      child: TextField(
         controller: _searchController,
         focusNode: _searchFocusNode,
         onChanged: (_) => _onSearchChanged(),
@@ -237,6 +239,7 @@ class _ChatsDrawerState extends ConsumerState<ChatsDrawer> {
             vertical: Spacing.xs,
           ),
         ),
+      ),
     );
   }
 
@@ -687,6 +690,7 @@ class _ChatsDrawerState extends ConsumerState<ChatsDrawer> {
           style: AppTypography.labelStyle.copyWith(
             color: theme.textSecondary,
             fontWeight: FontWeight.w600,
+            decoration: TextDecoration.none,
           ),
         ),
         const SizedBox(width: Spacing.xs),
@@ -702,7 +706,10 @@ class _ChatsDrawerState extends ConsumerState<ChatsDrawer> {
           ),
           child: Text(
             '$count',
-            style: AppTypography.tiny.copyWith(color: theme.textSecondary),
+            style: AppTypography.tiny.copyWith(
+              color: theme.textSecondary,
+              decoration: TextDecoration.none,
+            ),
           ),
         ),
       ],
@@ -716,7 +723,10 @@ class _ChatsDrawerState extends ConsumerState<ChatsDrawer> {
       children: [
         Text(
           AppLocalizations.of(context)!.folders,
-          style: AppTypography.labelStyle.copyWith(color: theme.textSecondary),
+          style: AppTypography.labelStyle.copyWith(
+            color: theme.textSecondary,
+            decoration: TextDecoration.none,
+          ),
         ),
         const Spacer(),
         IconButton(
@@ -1489,6 +1499,7 @@ class _ChatsDrawerState extends ConsumerState<ChatsDrawer> {
                       style: AppTypography.bodySmallStyle.copyWith(
                         color: theme.textPrimary,
                         fontWeight: FontWeight.w600,
+                        decoration: TextDecoration.none,
                       ),
                     ),
                   ),