feat: study home with daily plan card and quick actions
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@@ -1,8 +1,12 @@
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import 'package:flutter/material.dart';
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import '../widgets/empty_state.dart';
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import '../models/study_plan.dart';
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/// 学习：今天到期的卡片与复习会话入口。
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/// 学习首页。
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///
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/// 信息层级刻意保持简单，和百词斩首页同构：
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/// 当前材料 → 今日任务（要做什么 + 要多久）→ 唯一主行动 → 快捷入口。
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/// 但去掉它的商业化部分：没有广告位、没有课程倒计时、没有电商入口。
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class StudyPage extends StatelessWidget {
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const StudyPage({super.key});
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@@ -10,11 +14,302 @@ class StudyPage extends StatelessWidget {
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: const Text('学习')),
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body: const EmptyState(
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icon: Icons.school_outlined,
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title: '开始今天的复习',
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message: '待学习的卡片和到期需要复习的卡片会出现在这里。',
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body: ListView(
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padding: const EdgeInsets.fromLTRB(16, 8, 16, 32),
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children: const <Widget>[
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_DeckCard(plan: StudyPlan.sample),
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SizedBox(height: 14),
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_TodayPlanCard(plan: StudyPlan.sample),
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SizedBox(height: 18),
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_QuickActions(),
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],
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),
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);
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}
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}
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/// 当前单元集：名称、算法、完成度。
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class _DeckCard extends StatelessWidget {
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const _DeckCard({required this.plan});
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final StudyPlan plan;
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@override
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Widget build(BuildContext context) {
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final ThemeData theme = Theme.of(context);
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final ColorScheme colors = theme.colorScheme;
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final TextTheme text = theme.textTheme;
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return _SurfaceCard(
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onTap: () => _pending(context, '单元集切换'),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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Row(
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children: <Widget>[
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Container(
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width: 48,
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height: 48,
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decoration: BoxDecoration(
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color: colors.primaryContainer,
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borderRadius: BorderRadius.circular(12),
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),
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child: Icon(
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Icons.menu_book_rounded,
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color: colors.onPrimaryContainer,
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),
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),
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const SizedBox(width: 12),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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Text(
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plan.deckName,
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style: text.titleMedium,
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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),
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const SizedBox(height: 2),
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Text(
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'调度算法 ${plan.algorithm}',
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style: text.bodySmall?.copyWith(
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color: colors.onSurfaceVariant,
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),
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),
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],
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),
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),
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Icon(
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Icons.unfold_more_rounded,
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size: 20,
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color: colors.onSurfaceVariant,
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),
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],
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),
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const SizedBox(height: 16),
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ClipRRect(
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borderRadius: BorderRadius.circular(6),
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child: LinearProgressIndicator(
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value: plan.progress,
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minHeight: 8,
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backgroundColor: colors.surfaceContainerHighest,
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),
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),
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const SizedBox(height: 8),
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Row(
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children: <Widget>[
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Text(
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'${plan.activatedItems} / ${plan.totalItems}',
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style: text.bodySmall?.copyWith(color: colors.onSurfaceVariant),
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),
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const Spacer(),
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Text(
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plan.progressPercent,
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style: text.bodySmall?.copyWith(
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color: colors.onSurfaceVariant,
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fontWeight: FontWeight.w600,
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),
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),
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],
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),
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],
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),
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);
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}
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}
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/// 今日任务：两个数字 + 时长承诺 + 唯一主行动。
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class _TodayPlanCard extends StatelessWidget {
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const _TodayPlanCard({required this.plan});
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final StudyPlan plan;
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@override
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Widget build(BuildContext context) {
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final ThemeData theme = Theme.of(context);
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final ColorScheme colors = theme.colorScheme;
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final TextTheme text = theme.textTheme;
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return _SurfaceCard(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: <Widget>[
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Text('今日计划', style: text.titleMedium),
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const SizedBox(height: 18),
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Row(
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children: <Widget>[
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Expanded(child: _BigStat(label: '待复习', value: plan.dueItems)),
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Expanded(child: _BigStat(label: '待新识', value: plan.newItems)),
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],
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),
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const SizedBox(height: 16),
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Center(
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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Icon(
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Icons.schedule_rounded,
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size: 16,
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color: colors.onSurfaceVariant,
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),
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const SizedBox(width: 6),
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Text(
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plan.estimatedLabel,
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style: text.bodyMedium?.copyWith(
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color: colors.onSurfaceVariant,
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),
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),
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],
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),
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),
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const SizedBox(height: 16),
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FilledButton(
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onPressed: plan.isEmpty ? null : () => _pending(context, '学习会话'),
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style: FilledButton.styleFrom(
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minimumSize: const Size.fromHeight(52),
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textStyle: text.titleMedium,
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),
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child: Text(plan.isEmpty ? '今天已完成' : '开始学习'),
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),
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],
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),
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);
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}
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}
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class _BigStat extends StatelessWidget {
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const _BigStat({required this.label, required this.value});
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final String label;
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final int value;
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@override
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Widget build(BuildContext context) {
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final ThemeData theme = Theme.of(context);
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final ColorScheme colors = theme.colorScheme;
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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Text(
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label,
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style: theme.textTheme.bodyMedium?.copyWith(
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color: colors.onSurfaceVariant,
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),
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),
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const SizedBox(height: 2),
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Row(
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crossAxisAlignment: CrossAxisAlignment.baseline,
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textBaseline: TextBaseline.alphabetic,
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children: <Widget>[
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Text(
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'$value',
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style: theme.textTheme.displaySmall?.copyWith(
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fontWeight: FontWeight.w700,
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height: 1.1,
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),
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),
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const SizedBox(width: 6),
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Text(
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'条',
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style: theme.textTheme.bodySmall?.copyWith(
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color: colors.onSurfaceVariant,
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),
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),
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],
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),
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],
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);
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}
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}
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/// 快捷入口。都是「学习域」内的次级入口，维护类操作不放这里。
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class _QuickActions extends StatelessWidget {
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const _QuickActions();
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static const List<(IconData, String)> _items = <(IconData, String)>[
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(Icons.star_border_rounded, '收藏夹'),
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(Icons.volume_up_outlined, '语音缓存'),
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(Icons.history_rounded, '最近学习'),
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(Icons.replay_rounded, '难点重练'),
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];
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@override
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Widget build(BuildContext context) {
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final ThemeData theme = Theme.of(context);
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final ColorScheme colors = theme.colorScheme;
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return Row(
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children: <Widget>[
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for (final (int index, (IconData icon, String label)) in _items.indexed)
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Expanded(
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child: Padding(
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padding: EdgeInsets.only(left: index == 0 ? 0 : 8),
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child: Material(
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color: colors.surfaceContainerLow,
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borderRadius: BorderRadius.circular(16),
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child: InkWell(
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borderRadius: BorderRadius.circular(16),
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onTap: () => _pending(context, label),
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child: Padding(
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padding: const EdgeInsets.symmetric(vertical: 14),
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child: Column(
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children: <Widget>[
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Icon(icon, size: 22, color: colors.primary),
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const SizedBox(height: 8),
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Text(
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label,
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style: theme.textTheme.labelSmall?.copyWith(
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color: colors.onSurfaceVariant,
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),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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),
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],
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),
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),
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),
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),
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),
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),
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],
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);
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}
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}
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/// 统一的卡片外观，避免每处重复写圆角和底色。
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class _SurfaceCard extends StatelessWidget {
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const _SurfaceCard({required this.child, this.onTap});
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final Widget child;
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/// 可点击时给出水波纹反馈；为 null 时是纯展示卡片。
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final VoidCallback? onTap;
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@override
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Widget build(BuildContext context) {
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final BorderRadius radius = BorderRadius.circular(20);
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return Material(
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color: Theme.of(context).colorScheme.surfaceContainerLow,
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borderRadius: radius,
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clipBehavior: Clip.antiAlias,
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child: InkWell(
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onTap: onTap,
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borderRadius: radius,
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child: Padding(padding: const EdgeInsets.all(18), child: child),
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),
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);
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}
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}
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/// 尚未接入内核的入口，点击给出明确反馈而不是静默无响应。
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void _pending(BuildContext context, String feature) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text('$feature 尚未接入内核'),
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behavior: SnackBarBehavior.floating,
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margin: const EdgeInsets.fromLTRB(16, 0, 16, 88),
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),
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);
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}
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