初始提交：极码 GeekCode 全栈项目（FastAPI + Vue3）

backend/models/knowledge_base.py

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+"""团队知识库模型"""
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey
+from sqlalchemy.sql import func
+from database import Base
+
+
+class KbCategory(Base):
+    """知识库分类"""
+    __tablename__ = "kb_categories"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(100), nullable=False, unique=True)
+    icon = Column(String(500), default="")
+    sort_order = Column(Integer, default=0)
+    is_active = Column(Boolean, default=True, nullable=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+
+class KbItem(Base):
+    """知识库条目（关联帖子）"""
+    __tablename__ = "kb_items"
+
+    id = Column(Integer, primary_key=True, index=True)
+    category_id = Column(Integer, ForeignKey("kb_categories.id"), nullable=True, index=True)
+    post_id = Column(Integer, ForeignKey("posts.id"), nullable=False, index=True)
+    title = Column(String(200), nullable=False)
+    summary = Column(Text, default="")
+    sort_order = Column(Integer, default=0)
+    is_active = Column(Boolean, default=True, nullable=False)
+    added_by = Column(Integer, ForeignKey("users.id"), nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+
+class KbAccessLog(Base):
+    """知识库访问日志"""
+    __tablename__ = "kb_access_logs"
+
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    action = Column(String(20), default="view")  # view / search / ai_chat
+    query = Column(Text, default="")
+    created_at = Column(DateTime(timezone=True), server_default=func.now())