fix(priority): keep readable priority sync details

backend/app/utils/dingtalk.py

@@ -93,18 +93,18 @@ def format_dingtalk_priority_changed(
             emoji = {"success": "✅", "failed": "❌", "skipped": "⏭️"}.get(u.get("status", ""), "➖")
             acc_name = u.get("account_name") or u.get("account_id") or "未知账号"
             acc_id = u.get("account_id") or "未知ID"
-            
+
             old_p = u.get("old_priority")
             old_p_str = "未知" if old_p in (None, "", "未知") else str(old_p)
-            
+
             new_p = u.get("new_priority")
             new_p_str = "未知" if new_p in (None, "", "未知") else str(new_p)
-            
+
             src_group = u.get("source_group_name") or u.get("source_group_id") or "未知来源"
-            
+
             rate = u.get("source_rate")
             rate_str = str(rate) if rate is not None else "—"
-            
+
             line = f"- {emoji} {acc_name}（账号ID {acc_id}）：old={old_p_str} → new={new_p_str}，来源分组={src_group}，倍率={rate_str}"
             if u.get("status") == "failed" and u.get("message"):
                 line += f"，原因={u.get('message')}"