Add FastAPI backend with agent system

backend/app/routers/stats.py

@@ -0,0 +1,77 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from app.database import get_db
+from app.models.user import User
+from app.routers.auth import get_current_user
+from app.schemas.stats import (
+    SystemHealth,
+    ConversationStats,
+    KnowledgeStats,
+    KanbanStats,
+    CommunityStats,
+    PersonalInsights,
+)
+from app.services.stats_service import StatsService
+
+router = APIRouter(prefix="/api/stats", tags=["统计"])
+
+
+@router.get("/system", response_model=SystemHealth)
+async def get_system_health(db: Session = Depends(get_db)):
+    """获取系统健康指标"""
+    svc = StatsService(db)
+    return svc.get_system_health()
+
+
+@router.get("/conversations", response_model=ConversationStats)
+async def get_conversation_stats(
+    days: int = 30,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    """获取对话统计数据"""
+    svc = StatsService(db)
+    return svc.get_conversation_stats(user_id=current_user.id, days=days)
+
+
+@router.get("/knowledge", response_model=KnowledgeStats)
+async def get_knowledge_stats(
+    days: int = 30,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    """获取知识库统计数据"""
+    svc = StatsService(db)
+    return svc.get_knowledge_stats(user_id=current_user.id, days=days)
+
+
+@router.get("/kanban", response_model=KanbanStats)
+async def get_kanban_stats(
+    days: int = 30,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    """获取看板统计数据"""
+    svc = StatsService(db)
+    return svc.get_kanban_stats(user_id=current_user.id, days=days)
+
+
+@router.get("/community", response_model=CommunityStats)
+async def get_community_stats(
+    days: int = 30,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    """获取社区统计数据"""
+    svc = StatsService(db)
+    return svc.get_community_stats(user_id=current_user.id, days=days)
+
+
+@router.get("/insights", response_model=PersonalInsights)
+async def get_personal_insights(
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    """获取个人洞察"""
+    svc = StatsService(db)
+    return svc.get_personal_insights(user_id=current_user.id)