Changed theme to globally enable rounded borders for textfields

lib/theme.dart

@@ -1,15 +1,20 @@
 import 'package:flutter/material.dart';
 
-ThemeData get lightTheme => ThemeData.from(colorScheme: _lightColorScheme);
+const _seed = Colors.deepPurple;
 
-ThemeData get darkTheme => ThemeData.from(colorScheme: _darkColorScheme);
+ColorScheme get _lightColorScheme =>
+    ColorScheme.fromSeed(seedColor: _seed, brightness: Brightness.light);
 
-ColorScheme get _darkColorScheme => ColorScheme.fromSeed(
-  seedColor: Colors.deepPurple,
-  brightness: Brightness.dark,
-);
-
-ColorScheme get _lightColorScheme => ColorScheme.fromSeed(
-  seedColor: Colors.deepPurple,
-  brightness: Brightness.light,
+ColorScheme get _darkColorScheme =>
+    ColorScheme.fromSeed(seedColor: _seed, brightness: Brightness.dark);
+
+ThemeData get lightTheme => _baseTheme(_lightColorScheme);
+
+ThemeData get darkTheme => _baseTheme(_darkColorScheme);
+
+ThemeData _baseTheme(ColorScheme scheme) =>
+    ThemeData.from(colorScheme: scheme, useMaterial3: true).copyWith(
+      inputDecorationTheme: InputDecorationTheme(
+        border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+      ),
     );

lib/widgets/create_bookmark_collection_dialog.dart

@@ -41,9 +41,7 @@ class CreateBookmarkCollectionDialog extends StatelessWidget {
           FilteringTextInputFormatter.deny(RegExp(r'\s\s+')),
         ],
         decoration: InputDecoration(
-          // TODO: Localize
           labelText: AppLocalizations.of(context)!.collectionName,
-          border: OutlineInputBorder(borderRadius: BorderRadius.circular(10)),
         ),
       ),
       actions: [

lib/widgets/create_bookmark_dialog.dart

@@ -61,9 +61,6 @@ class CreateBookmarkDialog extends StatelessWidget {
               ],
               decoration: InputDecoration(
                 labelText: AppLocalizations.of(context)!.bookmarkTitle,
-                border: OutlineInputBorder(
-                  borderRadius: BorderRadius.circular(10),
-                ),
               ),
             ),
             TextField(
@@ -78,9 +75,6 @@ class CreateBookmarkDialog extends StatelessWidget {
               ],
               decoration: InputDecoration(
                 labelText: AppLocalizations.of(context)!.url,
-                border: OutlineInputBorder(
-                  borderRadius: BorderRadius.circular(10),
-                ),
               ),
             ),
             TextField(
@@ -95,9 +89,6 @@ class CreateBookmarkDialog extends StatelessWidget {
               ],
               decoration: InputDecoration(
                 labelText: AppLocalizations.of(context)!.description,
-                border: OutlineInputBorder(
-                  borderRadius: BorderRadius.circular(10),
-                ),
               ),
             ),
           ],