feat: AI聊天室多Agent协作讨论平台

- 实现Agent管理，支持AI辅助生成系统提示词
- 支持多个AI提供商（OpenRouter、智谱、MiniMax等）
- 实现聊天室和讨论引擎
- WebSocket实时消息推送
- 前端使用React + Ant Design
- 后端使用FastAPI + MongoDB

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/models/chatroom.py

@@ -0,0 +1,131 @@
+"""
+聊天室数据模型
+定义讨论聊天室的配置结构
+"""
+from datetime import datetime
+from typing import Optional, Dict, Any, List
+from enum import Enum
+from pydantic import Field
+from beanie import Document
+
+
+class ChatRoomStatus(str, Enum):
+    """聊天室状态枚举"""
+    IDLE = "idle"               # 空闲，等待开始
+    ACTIVE = "active"           # 讨论进行中
+    PAUSED = "paused"           # 暂停
+    COMPLETED = "completed"     # 已完成
+    ERROR = "error"             # 出错
+
+
+class ChatRoomConfig:
+    """聊天室配置"""
+    max_rounds: int = 50                  # 最大轮数（备用终止条件）
+    message_history_size: int = 20        # 上下文消息数
+    consensus_threshold: float = 0.8      # 共识阈值
+    round_interval: float = 1.0           # 轮次间隔(秒)
+    allow_user_interrupt: bool = True     # 允许用户中断
+    
+    def __init__(
+        self,
+        max_rounds: int = 50,
+        message_history_size: int = 20,
+        consensus_threshold: float = 0.8,
+        round_interval: float = 1.0,
+        allow_user_interrupt: bool = True
+    ):
+        self.max_rounds = max_rounds
+        self.message_history_size = message_history_size
+        self.consensus_threshold = consensus_threshold
+        self.round_interval = round_interval
+        self.allow_user_interrupt = allow_user_interrupt
+    
+    def to_dict(self) -> Dict[str, Any]:
+        """转换为字典"""
+        return {
+            "max_rounds": self.max_rounds,
+            "message_history_size": self.message_history_size,
+            "consensus_threshold": self.consensus_threshold,
+            "round_interval": self.round_interval,
+            "allow_user_interrupt": self.allow_user_interrupt
+        }
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "ChatRoomConfig":
+        """从字典创建"""
+        if not data:
+            return cls()
+        return cls(
+            max_rounds=data.get("max_rounds", 50),
+            message_history_size=data.get("message_history_size", 20),
+            consensus_threshold=data.get("consensus_threshold", 0.8),
+            round_interval=data.get("round_interval", 1.0),
+            allow_user_interrupt=data.get("allow_user_interrupt", True)
+        )
+
+
+class ChatRoom(Document):
+    """
+    聊天室文档模型
+    存储讨论聊天室的配置信息
+    """
+    room_id: str = Field(..., description="唯一标识")
+    name: str = Field(..., description="聊天室名称")
+    description: str = Field(default="", description="描述")
+    objective: str = Field(default="", description="当前讨论目标")
+    
+    # 参与者
+    agents: List[str] = Field(default_factory=list, description="Agent ID列表")
+    moderator_agent_id: Optional[str] = Field(default=None, description="共识判断Agent ID")
+    
+    # 配置
+    config: Dict[str, Any] = Field(
+        default_factory=lambda: {
+            "max_rounds": 50,
+            "message_history_size": 20,
+            "consensus_threshold": 0.8,
+            "round_interval": 1.0,
+            "allow_user_interrupt": True
+        },
+        description="聊天室配置"
+    )
+    
+    # 状态
+    status: str = Field(default=ChatRoomStatus.IDLE.value, description="当前状态")
+    current_round: int = Field(default=0, description="当前轮次")
+    current_discussion_id: Optional[str] = Field(default=None, description="当前讨论ID")
+    
+    # 元数据
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
+    completed_at: Optional[datetime] = Field(default=None, description="完成时间")
+    
+    class Settings:
+        name = "chatrooms"
+    
+    def get_config(self) -> ChatRoomConfig:
+        """获取配置对象"""
+        return ChatRoomConfig.from_dict(self.config)
+    
+    def is_active(self) -> bool:
+        """检查聊天室是否处于活动状态"""
+        return self.status == ChatRoomStatus.ACTIVE.value
+    
+    class Config:
+        json_schema_extra = {
+            "example": {
+                "room_id": "product-design-room",
+                "name": "产品设计讨论室",
+                "description": "用于讨论新产品功能设计",
+                "objective": "设计一个用户友好的登录系统",
+                "agents": ["product-manager", "designer", "developer"],
+                "moderator_agent_id": "moderator",
+                "config": {
+                    "max_rounds": 50,
+                    "message_history_size": 20,
+                    "consensus_threshold": 0.8
+                },
+                "status": "idle",
+                "current_round": 0
+            }
+        }