修复: AI 摘要无限重试循环导致 CPU 35%，限制每次最多生成 20 个摘要

internal/history.go

@@ -736,28 +736,40 @@ func recordFork(targetID, sourceID string) {
 // --- AI 摘要与收藏操作 ---
 
 func (m *Model) applySummary(sessionID, summary string, completed, pending []string) {
-	if summary == "" {
-		return
-	}
 	for _, pd := range m.history.Projects {
 		for _, s := range pd.Sessions {
 			if s.ID == sessionID {
-				s.AISummary = summary
-				s.Completed = completed
-				s.Pending = pending
-				updateSummaryInCache(m.history.Cache, sessionID, summary, completed, pending)
+				if summary == "" {
+					// 标记为已尝试，防止 nextSummaryCmd 无限重试
+					// 用 FirstMsg 作为兜底显示，避免显示空白
+					s.AISummary = s.FirstMsg
+					if s.AISummary == "" {
+						s.AISummary = s.ID[:8]
+					}
+				} else {
+					s.AISummary = summary
+					s.Completed = completed
+					s.Pending = pending
+				}
+				updateSummaryInCache(m.history.Cache, sessionID, s.AISummary, s.Completed, s.Pending)
 				return
 			}
 		}
 	}
 }
 
+const maxSummaryPerSession = 20 // 每次启动最多生成 N 个摘要
+
 func (m *Model) nextSummaryCmd() tea.Cmd {
+	if m.summaryCount >= maxSummaryPerSession {
+		return nil
+	}
 	for _, pd := range m.history.Projects {
 		for _, s := range pd.Sessions {
 			needSummary := s.AISummary == "" && s.FirstMsg != ""
 			needDetail := s.AISummary != "" && len(s.Completed) == 0 && len(s.Pending) == 0
 			if (needSummary || needDetail) && s.FilePath != "" {
+				m.summaryCount++
 				return generateSummaryCmd(s.FilePath, s.ID)
 			}
 		}