refactor: Clean up unused variables and improve code readability

src/plugins/heartFC_chat/heartFC_chat.py

@@ -174,7 +174,7 @@ class HeartFChatting:
         self,
         chat_id: str,
         sub_mind: SubMind,
-        observations: Observation,
+        observations: list[Observation],
         on_consecutive_no_reply_callback: Callable[[], Coroutine[None, None, None]],
     ):
         """
@@ -631,19 +631,18 @@ class HeartFChatting:
         observation = self.observations[0] if self.observations else None
 
         try:
-            dang_qian_deng_dai = 0.0  # 初始化本次等待时间
             with Timer("等待新消息", cycle_timers):
                 # 等待新消息、超时或关闭信号，并获取结果
                 await self._wait_for_new_message(observation, planner_start_db_time, self.log_prefix)
             # 从计时器获取实际等待时间
-            dang_qian_deng_dai = cycle_timers.get("等待新消息", 0.0)
+            current_waiting = cycle_timers.get("等待新消息", 0.0)
 
             if not self._shutting_down:
                 self._lian_xu_bu_hui_fu_ci_shu += 1
-                self._lian_xu_deng_dai_shi_jian += dang_qian_deng_dai  # 累加等待时间
+                self._lian_xu_deng_dai_shi_jian += current_waiting  # 累加等待时间
                 logger.debug(
                     f"{self.log_prefix} 连续不回复计数增加: {self._lian_xu_bu_hui_fu_ci_shu}/{CONSECUTIVE_NO_REPLY_THRESHOLD}, "
-                    f"本次等待: {dang_qian_deng_dai:.2f}秒, 累计等待: {self._lian_xu_deng_dai_shi_jian:.2f}秒"
+                    f"本次等待: {current_waiting:.2f}秒, 累计等待: {self._lian_xu_deng_dai_shi_jian:.2f}秒"
                 )
 
                 # 检查是否同时达到次数和时间阈值