refactor(chat): 重构HeartFChatting为模块化架构

将原本超长的heartFC_chat.py拆分为6个功能内聚的子模块：
- hfc_context：上下文数据容器
- cycle_tracker：循环状态记录
- energy_manager：能量值独立管理
- proactive_thinker：主动思考逻辑抽离
- cycle_processor：单次循环处理器
- response_handler / normal_mode_handler：响应策略

删除冗余常量、错误样板及旧逻辑；大幅减少类体积；降低耦合度，提升可维护性。

src/chat/chat_loop/energy_manager.py

@@ -0,0 +1,82 @@
+import asyncio
+import time
+from typing import Optional
+from src.common.logger import get_logger
+from src.config.config import global_config
+from src.plugin_system.base.component_types import ChatMode
+from .hfc_context import HfcContext
+
+logger = get_logger("hfc.energy")
+
+class EnergyManager:
+    def __init__(self, context: HfcContext):
+        self.context = context
+        self._energy_task: Optional[asyncio.Task] = None
+        self.last_energy_log_time = 0
+        self.energy_log_interval = 90
+
+    async def start(self):
+        if self.context.running and not self._energy_task:
+            self._energy_task = asyncio.create_task(self._energy_loop())
+            self._energy_task.add_done_callback(self._handle_energy_completion)
+            logger.info(f"{self.context.log_prefix} 能量管理器已启动")
+
+    async def stop(self):
+        if self._energy_task and not self._energy_task.done():
+            self._energy_task.cancel()
+            await asyncio.sleep(0)
+            logger.info(f"{self.context.log_prefix} 能量管理器已停止")
+
+    def _handle_energy_completion(self, task: asyncio.Task):
+        try:
+            if exception := task.exception():
+                logger.error(f"{self.context.log_prefix} 能量循环异常: {exception}")
+            else:
+                logger.info(f"{self.context.log_prefix} 能量循环正常结束")
+        except asyncio.CancelledError:
+            logger.info(f"{self.context.log_prefix} 能量循环被取消")
+
+    async def _energy_loop(self):
+        while self.context.running:
+            await asyncio.sleep(10)
+
+            if not self.context.chat_stream:
+                continue
+
+            is_group_chat = self.context.chat_stream.group_info is not None
+            if is_group_chat and global_config.chat.group_chat_mode != "auto":
+                if global_config.chat.group_chat_mode == "focus":
+                    self.context.loop_mode = ChatMode.FOCUS
+                    self.context.energy_value = 35
+                elif global_config.chat.group_chat_mode == "normal":
+                    self.context.loop_mode = ChatMode.NORMAL
+                    self.context.energy_value = 15
+                continue
+
+            if self.context.loop_mode == ChatMode.NORMAL:
+                self.context.energy_value -= 0.3
+                self.context.energy_value = max(self.context.energy_value, 0.3)
+            if self.context.loop_mode == ChatMode.FOCUS:
+                self.context.energy_value -= 0.6
+                self.context.energy_value = max(self.context.energy_value, 0.3)
+            
+            self._log_energy_change("能量值衰减")
+
+    def _should_log_energy(self) -> bool:
+        current_time = time.time()
+        if current_time - self.last_energy_log_time >= self.energy_log_interval:
+            self.last_energy_log_time = current_time
+            return True
+        return False
+
+    def _log_energy_change(self, action: str, reason: str = ""):
+        if self._should_log_energy():
+            log_message = f"{self.context.log_prefix} {action}，当前能量值：{self.context.energy_value:.1f}"
+            if reason:
+                log_message = f"{self.context.log_prefix} {action}，{reason}，当前能量值：{self.context.energy_value:.1f}"
+            logger.info(log_message)
+        else:
+            log_message = f"{self.context.log_prefix} {action}，当前能量值：{self.context.energy_value:.1f}"
+            if reason:
+                log_message = f"{self.context.log_prefix} {action}，{reason}，当前能量值：{self.context.energy_value:.1f}"
+            logger.debug(log_message)