更新封面和readme

internal/toc/manager.go

@@ -12,10 +12,11 @@ import (
 )
 
 type Manager struct {
-	storage  *storage.Storage
-	bot      *tele.Bot
-	chanID   int64
-	debounce time.Duration
+	storage    *storage.Storage
+	bot        *tele.Bot
+	chanID     int64
+	debounce   time.Duration
+	coverImage string
 
 	mu      sync.Mutex
 	pending bool
@@ -23,13 +24,14 @@ type Manager struct {
 	stopCh  chan struct{}
 }
 
-func NewManager(store *storage.Storage, bot *tele.Bot, chanID int64, debounce time.Duration) *Manager {
+func NewManager(store *storage.Storage, bot *tele.Bot, chanID int64, debounce time.Duration, coverImage string) *Manager {
 	return &Manager{
-		storage:  store,
-		bot:      bot,
-		chanID:   chanID,
-		debounce: debounce,
-		stopCh:   make(chan struct{}),
+		storage:    store,
+		bot:        bot,
+		chanID:     chanID,
+		debounce:   debounce,
+		coverImage: coverImage,
+		stopCh:     make(chan struct{}),
 	}
 }
 
@@ -72,6 +74,12 @@ func (m *Manager) updateMessage(content string) error {
 		return err
 	}
 
+	// 带封面图片模式
+	if m.coverImage != "" {
+		return m.updateWithPhoto(chat, msgID, content)
+	}
+
+	// 纯文本模式
 	if msgID == 0 {
 		msg, err := m.bot.Send(chat, content, tele.ModeMarkdown, tele.NoPreview)
 		if err != nil {
@@ -105,6 +113,47 @@ func (m *Manager) updateMessage(content string) error {
 	return nil
 }
 
+func (m *Manager) updateWithPhoto(chat *tele.Chat, msgID int, content string) error {
+	photo := &tele.Photo{
+		File:    tele.FromDisk(m.coverImage),
+		Caption: content,
+	}
+
+	if msgID == 0 {
+		msg, err := m.bot.Send(chat, photo, tele.ModeMarkdown)
+		if err != nil {
+			return err
+		}
+		return m.storage.SetTocMsgID(msg.ID)
+	}
+
+	existingMsg := &tele.Message{
+		ID:   msgID,
+		Chat: chat,
+	}
+
+	// 编辑图片消息的 caption
+	_, err := m.bot.EditCaption(existingMsg, content, tele.ModeMarkdown)
+	if err != nil {
+		errMsg := err.Error()
+		if err == tele.ErrMessageNotModified || strings.Contains(errMsg, "message is not modified") {
+			return nil
+		}
+		// 旧消息不是图片或找不到，重新发送
+		if strings.Contains(errMsg, "message to edit not found") ||
+			strings.Contains(errMsg, "no caption") {
+			msg, err := m.bot.Send(chat, photo, tele.ModeMarkdown)
+			if err != nil {
+				return err
+			}
+			return m.storage.SetTocMsgID(msg.ID)
+		}
+		return err
+	}
+
+	return nil
+}
+
 func (m *Manager) Stop() {
 	m.mu.Lock()
 	defer m.mu.Unlock()

internal/toc/renderer.go

@@ -45,7 +45,6 @@ func (m *Manager) Render() (string, error) {
 	}
 
 	sb.WriteString("━━━━━━━━━━━━━━━\n")
-	sb.WriteString("_自动生成_")
 
 	return sb.String(), nil
 }