Refactor post handling and add command setup for Telegram bot

internal/toc/manager.go

@@ -2,6 +2,7 @@ package toc
 
 import (
 	"log"
+	"strings"
 	"sync"
 	"time"
 
@@ -86,10 +87,12 @@ func (m *Manager) updateMessage(content string) error {
 
 	_, err = m.bot.Edit(existingMsg, content, tele.ModeMarkdown, tele.NoPreview)
 	if err != nil {
-		if err == tele.ErrMessageNotModified {
+		errMsg := err.Error()
+		// 内容未变化，忽略
+		if err == tele.ErrMessageNotModified || strings.Contains(errMsg, "message is not modified") {
 			return nil
 		}
-		if err.Error() == "telegram: message to edit not found (400)" {
+		if strings.Contains(errMsg, "message to edit not found") {
 			msg, err := m.bot.Send(chat, content, tele.ModeMarkdown, tele.NoPreview)
 			if err != nil {
 				return err