M3 Overhaul

lib/widgets/multi_select_picker.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import '../theme/m3_motion.dart';
 
 /// Lightweight, bounds-safe multi-select picker used in dialogs.
 /// - Renders chips for selected items and a `Select` ActionChip.
@@ -43,7 +44,7 @@ class _MultiSelectPickerState<T> extends State<MultiSelectPicker<T>> {
     List<String>? result;
 
     if (isMobile) {
-      result = await showModalBottomSheet<List<String>>(
+      result = await m3ShowBottomSheet<List<String>>(
         context: context,
         isScrollControlled: true,
         builder: (sheetContext) {
@@ -132,7 +133,7 @@ class _MultiSelectPickerState<T> extends State<MultiSelectPicker<T>> {
                             child: const Text('Cancel'),
                           ),
                           const SizedBox(width: 8),
-                          ElevatedButton(
+                          FilledButton(
                             onPressed: () =>
                                 Navigator.of(sheetContext).pop(working),
                             child: const Text('Done'),
@@ -148,9 +149,8 @@ class _MultiSelectPickerState<T> extends State<MultiSelectPicker<T>> {
         },
       );
     } else {
-      result = await showDialog<List<String>>(
+      result = await m3ShowDialog<List<String>>(
         context: context,
-        useRootNavigator: true,
         builder: (dialogContext) {
           List<String> working = List<String>.from(_selectedIds);
           bool workingSelectAll =
@@ -232,7 +232,7 @@ class _MultiSelectPickerState<T> extends State<MultiSelectPicker<T>> {
                         onPressed: () => Navigator.of(dialogContext).pop(),
                         child: const Text('Cancel'),
                       ),
-                      ElevatedButton(
+                      FilledButton(
                         onPressed: () =>
                             Navigator.of(dialogContext).pop(working),
                         child: const Text('Done'),