feat: 完善听力口语辅助状态记录、练习分块与复习抽查间隔机制

kouyu_english/lib/features/profile/learning_records_page.dart

@@ -30,6 +30,18 @@ class _LearningRecordsViewState extends State<LearningRecordsView> {
 
   @override
   Widget build(BuildContext context) {
+    final progress = <String>{};
+    final improved = <String, AttemptEvidence>{};
+    for (final entry in widget.state.attemptEvidence) {
+      final key = '${entry.itemId}|${entry.skill}';
+      if (entry.outcome == EvidenceKind.assisted ||
+          entry.outcome == EvidenceKind.languageError) {
+        progress.add(key);
+      } else if (entry.outcome == EvidenceKind.independentSuccess &&
+          progress.contains(key)) {
+        improved[key] = entry;
+      }
+    }
     final records = widget.state.attemptEvidence.reversed
         .where(_matches)
         .take(_limit)
@@ -41,6 +53,21 @@ class _LearningRecordsViewState extends State<LearningRecordsView> {
     return SpacedColumn(
       spacing: 16,
       children: [
+        if (improved.isNotEmpty)
+          SectionCard(
+            tint: AppColors.softGreen,
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                const Text('从需要帮助到独立完成'),
+                const SizedBox(height: 6),
+                for (final entry in improved.values.toList().reversed.take(3))
+                  Text(
+                    '${widget.state.mastery[entry.itemId]?.label ?? entry.itemId} · ${entry.skill}',
+                  ),
+              ],
+            ),
+          ),
         SizedBox(
           width: double.infinity,
           child: SegmentedButton<_RecordFilter>(
@@ -100,7 +127,7 @@ class _RecordTile extends StatelessWidget {
       ),
       EvidenceKind.assisted => ('带提示', AppColors.warmInk, AppColors.warm),
       EvidenceKind.languageError => ('需要复核', AppColors.warmInk, AppColors.warm),
-      EvidenceKind.pending => ('稍后完成', AppColors.muted, AppColors.surfaceMuted),
+      EvidenceKind.pending => ('待确认', AppColors.muted, AppColors.surfaceMuted),
       EvidenceKind.exposure => ('已查看', AppColors.muted, AppColors.surfaceMuted),
     };
     return ListTile(
@@ -110,7 +137,19 @@ class _RecordTile extends StatelessWidget {
         maxLines: 1,
         overflow: TextOverflow.ellipsis,
       ),
-      subtitle: Text('${evidence.skill} · ${relativeTime(evidence.createdAt)}'),
+      subtitle: Text(
+        [
+          evidence.skill,
+          relativeTime(evidence.createdAt),
+          if (evidence.listeningSupport == ListeningSupport.slow) '慢听后完成',
+          if (evidence.listeningSupport == ListeningSupport.transcript)
+            '看原文后完成',
+          if (evidence.firstTry == true) '首次答对',
+          if (evidence.attemptCount != null && evidence.attemptCount! > 1)
+            '尝试 ${evidence.attemptCount} 次',
+          if (evidence.usedSentenceBuild) '练过句子拆段',
+        ].join(' · '),
+      ),
       trailing: Container(
         padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
         decoration: BoxDecoration(

kouyu_english/lib/features/profile/level_progress_page.dart

@@ -22,7 +22,7 @@ class LevelProgressView extends StatelessWidget {
         style: Theme.of(context).textTheme.headlineMedium,
       ),
       Text(
-        state.a0Passed ? 'A1 主线内容尚未提供，可继续进行 A0 巩固。' : '进度来自掌握证据，不是上完固定课数就升级。',
+        state.a0Passed ? 'A1 课程待教学审校开放，可继续进行 A0 巩固。' : '进度来自掌握证据，不是上完固定课数就升级。',
       ),
       MenuGroup(
         children: [

kouyu_english/lib/features/profile/profile_page.dart

@@ -306,7 +306,7 @@ class _StageCard extends StatelessWidget {
           ),
           Text(
             missing.isEmpty
-                ? 'A0 已通过。A1 主线内容尚未提供，可继续进行 A0 巩固。'
+                ? 'A0 已通过。A1 课程待教学审校开放，可继续进行 A0 巩固。'
                 : '还需：${missing.join(' · ')}',
             style: Theme.of(context).textTheme.bodyMedium,
           ),