refactor: 将课程各步骤拆分到 features/lesson/steps/

lesson_flow.dart 保留流程状态、公共脚手架与小组件，预习/听/说/读/写/独立表达六个步骤各自成为 part 文件。代码仅搬移并经 dart format 格式化，无用户可见变化。 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-16 17:23:26 +09:00
parent 8302977351
commit be70ad2a29
7 changed files with 1097 additions and 1025 deletions
@@ -0,0 +1,62 @@
+part of '../lesson_flow.dart';
+
+class _PreviewStep extends StatelessWidget {
+  const _PreviewStep({
+    required this.state,
+    required this.item,
+    required this.position,
+    required this.total,
+    required this.onLookup,
+    required this.onNext,
+    required this.onSkip,
+  });
+
+  final VocabularyItem item;
+  final AppState state;
+  final int position;
+  final int total;
+  final VoidCallback onLookup;
+  final VoidCallback onNext;
+  final VoidCallback onSkip;
+
+  @override
+  Widget build(BuildContext context) => _LessonScaffold(
+    step: 1,
+    child: SpacedColumn(
+      children: [
+        Eyebrow('先认识今天的词 · $position / $total'),
+        Text('后面会遇到这些词。', style: Theme.of(context).textTheme.headlineMedium),
+        const Text('先听一遍、知道意思就够了，不用马上背会。'),
+        SectionCard(
+          tint: AppColors.softGreen,
+          child: SpacedColumn(
+            children: [
+              Text(
+                item.word,
+                style: const TextStyle(
+                  fontSize: 28,
+                  fontWeight: FontWeight.w600,
+                ),
+              ),
+              if (item.ipa != null)
+                Text(item.ipa!, style: Theme.of(context).textTheme.bodyMedium),
+              Text(item.meaning, style: const TextStyle(fontSize: 17)),
+              _AudioRow(label: '播放示范音', speech: item.word),
+              LexiconText(item.example, state: state),
+              Text(item.exampleMeaning),
+            ],
+          ),
+        ),
+        Wrap(
+          spacing: 8,
+          children: [ActionChip(label: const Text('查词'), onPressed: onLookup)],
+        ),
+        PrimaryButton(
+          label: position == total ? '进入课程' : '认识了，下一个',
+          onPressed: onNext,
+        ),
+        TextButton(onPressed: onSkip, child: const Text('跳过，直接进入课程')),
+      ],
+    ),
+  );
+}