feat: 添加Discord适配器与跨平台消息互通功能

新增Discord适配器支持，实现Discord与QQ之间的消息互通
添加通用数据模型用于跨平台消息转换
扩展配置系统以支持Discord和日志配置
重构日志系统以使用配置中的日志级别
在反向WebSocket管理器中注册Bot实例
更新主程序以支持Discord客户端启动
添加测试脚本验证核心功能

adapters/discord_adapter.py

@@ -0,0 +1,136 @@
+# -*- coding: utf-8 -*-
+"""
+Discord 适配器 (Discord Adapter)
+
+此模块负责与 Discord API 建立连接，接收 Discord 消息，
+并将其转换为通用数据模型 (Universal Data Models)，
+同时提供将通用消息段发送回 Discord 的能力。
+"""
+import asyncio
+import json
+import os
+import io
+import requests
+from typing import Union, List, Optional
+
+try:
+    import discord
+    DISCORD_AVAILABLE = True
+except ImportError:
+    DISCORD_AVAILABLE = False
+
+from core.utils.logger import ModuleLogger
+from .router import DiscordToOneBotConverter
+from core.managers.redis_manager import redis_manager
+
+class DiscordAdapter(discord.Client if DISCORD_AVAILABLE else object):
+    """
+    Discord 客户端适配器。
+    继承自 discord.Client，负责处理 Discord 的底层事件。
+    """
+    def __init__(self, token: str):
+        if not DISCORD_AVAILABLE:
+            raise ImportError("discord.py 未安装，请运行 `pip install discord.py`")
+            
+        # 必须声明 Intents，否则无法读取消息内容
+        intents = discord.Intents.default()
+        intents.message_content = True
+        
+        super().__init__(intents=intents)
+        self.token = token
+        self.logger = ModuleLogger("DiscordAdapter")
+        self.send_channel = None
+
+    async def on_ready(self):
+        """当 Bot 成功连接到 Discord 时触发"""
+        self.logger.success(f"Discord Bot 已登录: {self.user} (ID: {self.user.id})")
+        
+        # 启动 Redis 订阅以处理跨平台消息
+        asyncio.create_task(self.start_redis_subscription())
+
+    async def on_message(self, message: 'discord.Message'):
+        """当收到 Discord 消息时触发"""
+        # 忽略机器人自己的消息
+        if message.author.bot:
+            return
+
+        self.logger.info(f"[Discord 消息] {message.author}: {message.content}")
+
+        # 1. 将 discord.Message 伪装成 OneBot 事件模型
+        # 2. 触发业务逻辑
+        # 将伪装后的事件丢给现有的命令管理器 (matcher)
+        from core.managers.command_manager import matcher
+        
+        # matcher.handle_event 需要 bot 实例和 event 实例
+        # 我们在 create_mock_event 中已经注入了一个假的 bot 对象
+        try:
+            mock_event = DiscordToOneBotConverter.create_mock_event(message, self)
+            await matcher.handle_event(mock_event.bot, mock_event)
+        except Exception as e:
+            self.logger.error(f"处理 Discord 消息时发生异常: {e}")
+
+    async def start_redis_subscription(self):
+        """启动 Redis 订阅以处理跨平台消息发送"""
+        if redis_manager.redis is None:
+            self.logger.warning("[DiscordAdapter] Redis 未初始化，跳过订阅")
+            return
+            
+        try:
+            channel_name = "neobot_discord_send"
+            pubsub = redis_manager.redis.pubsub()
+            await pubsub.subscribe(channel_name)
+            
+            self.logger.success(f"[DiscordAdapter] 已订阅 Redis 频道: {channel_name}")
+            
+            async for message in pubsub.listen():
+                if message["type"] == "message":
+                    try:
+                        data = json.loads(message["data"])
+                        if data.get("type") == "send_message":
+                            await self.handle_send_message(data)
+                    except json.JSONDecodeError as e:
+                        self.logger.error(f"[DiscordAdapter] 解析 Redis 消息失败: {e}")
+                    except Exception as e:
+                        self.logger.error(f"[DiscordAdapter] 处理 Redis 消息失败: {e}")
+                        
+        except Exception as e:
+            self.logger.error(f"[DiscordAdapter] Redis 订阅异常: {e}")
+
+    async def handle_send_message(self, data: dict):
+        """处理来自 Redis 的消息发送请求"""
+        try:
+            channel_id = data.get("channel_id")
+            content = data.get("content", "")
+            attachments = data.get("attachments", [])
+            
+            if channel_id is None:
+                self.logger.error("[DiscordAdapter] 缺少 channel_id")
+                return
+                
+            channel = self.get_channel(channel_id)
+            if channel is None:
+                self.logger.error(f"[DiscordAdapter] 未找到频道: {channel_id}")
+                return
+            
+            self.logger.info(f"[DiscordAdapter] 正在发送消息到频道 {channel_id}")
+            
+            # 发送内容和附件（合并为一条消息）
+            if content or attachments:
+                await channel.send(content=content, files=[discord.File(fp=io.BytesIO(requests.get(attachment_url).content), filename=os.path.basename(attachment_url)) for attachment_url in attachments if attachment_url.startswith('http')] if attachments else None)
+                
+            self.logger.success(f"[DiscordAdapter] 消息已发送到频道 {channel_id}")
+            
+        except Exception as e:
+            self.logger.error(f"[DiscordAdapter] 发送消息失败: {e}")
+
+    async def start_client(self):
+        """启动 Discord 客户端（非阻塞方式）"""
+        if not DISCORD_AVAILABLE:
+            self.logger.error("无法启动 Discord 客户端：discord.py 未安装")
+            return
+            
+        try:
+            self.logger.info("正在连接 Discord...")
+            await self.start(self.token)
+        except Exception as e:
+            self.logger.error(f"Discord 连接失败: {e}")