refactor(chain): 处理链功能域 mixin 化，清理未使用导入并根治兼容层循环导入

- ChainBase 拆分为 RecognitionMixin/MessageProcessingMixin/NotificationMixin
- TransferChain 拆分为 7 个功能 mixin（_mixins.py），SubscribeChain 音乐订阅域拆出 _music.py
- 斜杠命令交互四件套收敛为 InteractionChainMixin 委托，会话管理器移至 application 层，chain 层不再 re-export
- 模块基础类收敛到 app/modules/_base（notification/mediaserver 语义重命名）
- 清理 app/chain/__init__.py 24 个未使用导入，修正 49 处测试 patch 目标到实际命名空间
- 兼容层 legacy 符号不再并入 __all__，根治 schemas 初始化反向拉起 application.transfer 的循环导入
- 修复 bangumi 集数为字符串时 set_bangumi_info 抛 TypeError
- 新增重复代码等架构门禁测试；capability 清单校验排除下划线内部目录

app/modules/discord/__init__.py

@@ -1,27 +1,23 @@
-import copy
 import json
 from typing import Any, Dict, List, Optional, Tuple, Union
 from urllib.parse import quote, unquote
 
 from app.domain.context import MediaInfo, Context
-from app.runtime.events import eventmanager
 from app.application.messaging.agent import (
     matches_channel_admin,
     register_channel_admin_resolver,
     resolve_config_principal_ids,
 )
 from app.runtime.log import logger
-from app.modules import _ModuleBase, _MessageBase
+from app.modules._base import _MessageChannelModuleBase
 from app.schemas import (
-    CommandRegisterEventData,
     CommingMessage,
     MessageChannel,
     MessageResponse,
     Notification,
 )
-from app.schemas.types import ChainEventType, ModuleType
+from app.schemas.types import ModuleType
 from app.adapters.network.http import RequestUtils
-from app.foundation.collections import DictUtils
 
 try:
     from app.modules.discord.discord import Discord
@@ -36,7 +32,9 @@ register_channel_admin_resolver(
 )
 
 
-class DiscordModule(_ModuleBase, _MessageBase[Discord]):
+class DiscordModule(_MessageChannelModuleBase[Discord]):
+    # 管理员配置键，与渠道 resolver 保持一致
+    _admin_config_key = "DISCORD_ADMINS"
     _IMAGE_SUFFIXES = (
         ".png",
         ".jpg",
@@ -107,51 +105,9 @@ class DiscordModule(_ModuleBase, _MessageBase[Discord]):
             except Exception as err:
                 logger.error(f"停止Discord模块实例失败：{err}")
 
-    def test(self) -> Optional[Tuple[bool, str]]:
-        """
-        测试模块连接性
-        """
-        if not self.get_instances():
-            return None
-        for name, client in self.get_instances().items():
-            state = client.get_state()
-            if not state:
-                return False, f"Discord {name} Bot 未就绪"
-        return True, ""
-
     def init_setting(self) -> Tuple[str, Union[str, bool]]:
         pass
 
-    @staticmethod
-    def _get_admins(config: Optional[dict]) -> List[str]:
-        """
-        解析 Discord 管理员配置，兼容逗号分隔和首尾空白。
-        """
-        return [
-            admin.strip()
-            for admin in str((config or {}).get("DISCORD_ADMINS") or "").split(",")
-            if admin.strip()
-        ]
-
-    @classmethod
-    def _should_reject_admin_command(
-            cls,
-            config: Optional[dict],
-            *user_ids: Optional[Union[str, int]],
-    ) -> bool:
-        """
-        判断 Discord 命令或命令型按钮回调是否应因非管理员身份被拒绝。
-        """
-        admins = cls._get_admins(config)
-        if not admins:
-            return False
-        candidates = [
-            str(user_id).strip()
-            for user_id in user_ids
-            if user_id is not None and str(user_id).strip()
-        ]
-        return not any(candidate in admins for candidate in candidates)
-
     @staticmethod
     def _send_admin_denied(
             client: Optional[Discord],
@@ -556,54 +512,6 @@ class DiscordModule(_ModuleBase, _MessageBase[Discord]):
                     return True
         return False
 
-    def register_commands(self, commands: Dict[str, dict]) -> None:
-        """
-        注册命令，实现这个函数接收系统可用的命令菜单。
-
-        :param commands: 命令字典
-        """
-        for client_config in self.get_configs().values():
-            client = self.get_instance(client_config.name)
-            if not client:
-                continue
-
-            scoped_commands = copy.deepcopy(commands)
-            event = eventmanager.send_event(
-                ChainEventType.CommandRegister,
-                CommandRegisterEventData(
-                    commands=scoped_commands,
-                    origin="Discord",
-                    service=client_config.name,
-                ),
-            )
-
-            if event and event.event_data:
-                event_data: CommandRegisterEventData = event.event_data
-                if event_data.cancel:
-                    client.delete_commands()
-                    logger.debug(
-                        f"Command registration for {client_config.name} canceled by event: {event_data.source}"
-                    )
-                    continue
-                scoped_commands = event_data.commands or {}
-                if not scoped_commands:
-                    logger.debug("Filtered commands are empty, skipping registration.")
-                    client.delete_commands()
-
-            filtered_scoped_commands = DictUtils.filter_keys_to_subset(
-                scoped_commands,
-                commands,
-            )
-            if not filtered_scoped_commands:
-                logger.debug("Filtered commands are empty, skipping registration.")
-                client.delete_commands()
-                continue
-            if filtered_scoped_commands != commands:
-                logger.debug(
-                    f"Command set has changed, Updating new commands: {filtered_scoped_commands}"
-                )
-            client.register_commands(filtered_scoped_commands)
-
     def mark_message_processing_started(
         self,
         channel: MessageChannel,