优化: 资源消耗优化，发布 v0.2.1

internal/history.go

@@ -128,6 +128,7 @@ func scanAllProjects() ([]*ProjectDir, map[string]*cacheEntry, map[string]bool)
 	dirMap := make(map[string]*ProjectDir)
 	updatedIDs := make(map[string]bool)
 	seenIDs := make(map[string]bool)
+	scanBuf := make([]byte, 0, 64*1024) // 共享扫描缓冲区
 
 	for _, entry := range entries {
 		if !entry.IsDir() {
@@ -170,7 +171,7 @@ func scanAllProjects() ([]*ProjectDir, map[string]*cacheEntry, map[string]bool)
 				continue
 			}
 
-			session := scanSessionFile(filePath, sessionID)
+			session := scanSessionFile(filePath, sessionID, &scanBuf)
 			if session == nil || session.Cwd == "" {
 				continue
 			}
@@ -246,7 +247,7 @@ func addSessionToDir(dirMap map[string]*ProjectDir, s *Session) {
 
 const scanLineLimit = 500
 
-func scanSessionFile(path string, sessionID string) *Session {
+func scanSessionFile(path string, sessionID string, buf *[]byte) *Session {
 	f, err := os.Open(path)
 	if err != nil {
 		return nil
@@ -255,7 +256,7 @@ func scanSessionFile(path string, sessionID string) *Session {
 
 	s := &Session{ID: sessionID, FilePath: path}
 	scanner := bufio.NewScanner(f)
-	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
+	scanner.Buffer(*buf, 1024*1024)
 
 	lineCount := 0
 	firstMsgFound := false
@@ -615,14 +616,12 @@ func updateSummaryInCache(cache map[string]*cacheEntry, sessionID, summary strin
 	entry.AISummary = summary
 	entry.Completed = completed
 	entry.Pending = pending
-	// 异步持久化
-	home, err := os.UserHomeDir()
-	if err != nil {
-		return
-	}
-	saveCache(home, cache)
+	// 持久化由 Model.flushCache() 延迟批量写入
 }
 
+// cacheFlushMsg 延迟写缓存定时器消息
+type cacheFlushMsg struct{}
+
 // --- 收藏 ---
 
 func favoritesPath(home string) string {