fix：按照shadcn_ui对着demo_shadcn对齐

lib/app/app.dart

@@ -1,8 +1,12 @@
 import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:shadcn_ui/shadcn_ui.dart';
 
 import '../routing/app_router.dart';
 import '../theme/app_theme.dart';
+import '../theme/yanting_text.dart';
+import '../theme/yanting_shad_theme.dart';
 
 class ReportNotebooklmApp extends ConsumerWidget {
   const ReportNotebooklmApp({super.key});
@@ -10,125 +14,24 @@ class ReportNotebooklmApp extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final router = ref.watch(routerProvider);
-    return MaterialApp.router(
+    final dmSansStyle = GoogleFonts.dmSans().copyWith(
+      fontFamilyFallback: YantingText.fontFallback,
+    );
+
+    return ShadApp.router(
       title: '研听',
       debugShowCheckedModeBanner: false,
-      theme: buildAppTheme(),
-      scrollBehavior: const WhitespaceStretchScrollBehavior(),
+      theme: buildYantingShadTheme(),
+      darkTheme: buildYantingDarkShadTheme(),
       routerConfig: router,
-    );
-  }
-}
-
-class WhitespaceStretchScrollBehavior extends MaterialScrollBehavior {
-  const WhitespaceStretchScrollBehavior();
-
-  @override
-  Widget buildOverscrollIndicator(
-    BuildContext context,
-    Widget child,
-    ScrollableDetails details,
-  ) {
-    return _WhitespaceStretchIndicator(child: child);
-  }
-}
-
-class _WhitespaceStretchIndicator extends StatefulWidget {
-  const _WhitespaceStretchIndicator({required this.child});
-
-  final Widget child;
-
-  @override
-  State<_WhitespaceStretchIndicator> createState() =>
-      _WhitespaceStretchIndicatorState();
-}
-
-class _WhitespaceStretchIndicatorState
-    extends State<_WhitespaceStretchIndicator>
-    with SingleTickerProviderStateMixin {
-  static const double _maxStretch = 64;
-  static const double _dragResistance = 0.38;
-
-  late final AnimationController _offsetController =
-      AnimationController.unbounded(vsync: this)..addListener(_onTick);
-
-  @override
-  Widget build(BuildContext context) {
-    return NotificationListener<ScrollNotification>(
-      onNotification: _handleScrollNotification,
-      child: ClipRect(
-        child: Transform.translate(
-          offset: Offset(0, _offsetController.value),
-          child: widget.child,
-        ),
-      ),
-    );
-  }
-
-  @override
-  void dispose() {
-    _offsetController.dispose();
-    super.dispose();
-  }
-
-  bool _handleScrollNotification(ScrollNotification notification) {
-    if (notification.metrics.axis != Axis.vertical) {
-      return false;
-    }
-    if (notification is OverscrollNotification) {
-      final overscroll = notification.overscroll;
-      final atTop =
-          notification.metrics.pixels <= notification.metrics.minScrollExtent;
-      final atBottom =
-          notification.metrics.pixels >= notification.metrics.maxScrollExtent;
-      if (atTop && overscroll < 0) {
-        _setOffset(
-          (_offsetController.value - overscroll * _dragResistance).clamp(
-            0,
-            _maxStretch,
-          ),
+      scrollBehavior: const ShadScrollBehavior(),
+      materialThemeBuilder: (context, theme) => buildAppTheme(),
+      builder: (context, child) {
+        return DefaultTextStyle.merge(
+          style: TextStyle(fontFamilyFallback: dmSansStyle.fontFamilyFallback),
+          child: child ?? const SizedBox.shrink(),
         );
-      } else if (atBottom && overscroll > 0) {
-        _setOffset(
-          (_offsetController.value - overscroll * _dragResistance).clamp(
-            -_maxStretch,
-            0,
-          ),
-        );
-      }
-    }
-    if (notification is ScrollUpdateNotification &&
-        notification.dragDetails == null) {
-      _releaseOffset();
-    }
-    if (notification is ScrollEndNotification) {
-      _releaseOffset();
-    }
-    return false;
-  }
-
-  void _setOffset(num next) {
-    if (next == _offsetController.value) {
-      return;
-    }
-    _offsetController.stop();
-    _offsetController.value = next.toDouble();
-  }
-
-  void _releaseOffset() {
-    if (_offsetController.value == 0) {
-      return;
-    }
-    _offsetController.animateTo(
-      0,
-      duration: const Duration(milliseconds: 260),
-      curve: Curves.easeOutCubic,
+      },
     );
   }
-
-  void _onTick() {
-    if (mounted) {
-      setState(() {});
-    }
-  }
 }