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/discussion_result.py

@@ -0,0 +1,126 @@
+"""
+讨论结果数据模型
+定义讨论结果的结构
+"""
+from datetime import datetime
+from typing import Optional, Dict, Any, List
+from pydantic import Field
+from beanie import Document
+
+
+class DiscussionResult(Document):
+    """
+    讨论结果文档模型
+    存储讨论的最终结果
+    """
+    discussion_id: str = Field(..., description="讨论唯一标识")
+    room_id: str = Field(..., description="聊天室ID")
+    objective: str = Field(..., description="讨论目标")
+    
+    # 共识结果
+    consensus_reached: bool = Field(default=False, description="是否达成共识")
+    confidence: float = Field(default=0.0, ge=0, le=1, description="共识置信度")
+    
+    # 结果摘要
+    summary: str = Field(default="", description="讨论结果摘要")
+    action_items: List[str] = Field(default_factory=list, description="行动项列表")
+    unresolved_issues: List[str] = Field(default_factory=list, description="未解决的问题")
+    key_decisions: List[str] = Field(default_factory=list, description="关键决策")
+    
+    # 统计信息
+    total_rounds: int = Field(default=0, description="总轮数")
+    total_messages: int = Field(default=0, description="总消息数")
+    participating_agents: List[str] = Field(default_factory=list, description="参与的Agent列表")
+    agent_contributions: Dict[str, int] = Field(
+        default_factory=dict, 
+        description="各Agent发言次数统计"
+    )
+    
+    # 状态
+    status: str = Field(default="in_progress", description="状态: in_progress, completed, failed")
+    end_reason: str = Field(default="", description="结束原因")
+    
+    # 时间戳
+    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 = "discussions"
+        indexes = [
+            [("room_id", 1)],
+            [("created_at", -1)],
+        ]
+    
+    def mark_completed(
+        self,
+        consensus_reached: bool,
+        confidence: float,
+        summary: str,
+        action_items: List[str] = None,
+        unresolved_issues: List[str] = None,
+        end_reason: str = "consensus"
+    ) -> None:
+        """
+        标记讨论为已完成
+        
+        Args:
+            consensus_reached: 是否达成共识
+            confidence: 置信度
+            summary: 结果摘要
+            action_items: 行动项
+            unresolved_issues: 未解决问题
+            end_reason: 结束原因
+        """
+        self.consensus_reached = consensus_reached
+        self.confidence = confidence
+        self.summary = summary
+        self.action_items = action_items or []
+        self.unresolved_issues = unresolved_issues or []
+        self.status = "completed"
+        self.end_reason = end_reason
+        self.completed_at = datetime.utcnow()
+        self.updated_at = datetime.utcnow()
+    
+    def update_stats(
+        self,
+        total_rounds: int,
+        total_messages: int,
+        agent_contributions: Dict[str, int]
+    ) -> None:
+        """
+        更新统计信息
+        
+        Args:
+            total_rounds: 总轮数
+            total_messages: 总消息数
+            agent_contributions: Agent贡献统计
+        """
+        self.total_rounds = total_rounds
+        self.total_messages = total_messages
+        self.agent_contributions = agent_contributions
+        self.participating_agents = list(agent_contributions.keys())
+        self.updated_at = datetime.utcnow()
+    
+    class Config:
+        json_schema_extra = {
+            "example": {
+                "discussion_id": "disc-001",
+                "room_id": "product-design-room",
+                "objective": "设计用户登录系统",
+                "consensus_reached": True,
+                "confidence": 0.85,
+                "summary": "团队一致同意采用OAuth2.0 + 手机验证码的混合认证方案...",
+                "action_items": [
+                    "设计OAuth2.0集成方案",
+                    "开发短信验证服务",
+                    "编写安全测试用例"
+                ],
+                "unresolved_issues": [
+                    "第三方登录的优先级排序"
+                ],
+                "total_rounds": 15,
+                "total_messages": 45,
+                "status": "completed"
+            }
+        }