feat: P0/P1/P2全部功能 — 四层泳道/视角切换/KPI看板/预警/差异反打/预算/知识面板/回顾会/情景预测/Excel导入/角色权限

backend/app/models/knowledge_article.py

@@ -0,0 +1,23 @@
+"""管理会计OS — 知识库文章（P1-3 嵌入功能模块用）
+
+与 KnowledgeSummary/KnowledgeEvent（AI摘要系统）不同，此表存储静态的CMA知识文章，
+用于在功能模块右侧/底部嵌入展示。
+"""
+from sqlalchemy import Column, Integer, String, Text, DateTime, func
+from app.database import Base
+
+
+class KnowledgeArticle(Base):
+    """知识库文章"""
+    __tablename__ = "knowledge_articles"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(200), nullable=False, comment="文章标题")
+    summary = Column(String(500), nullable=True, comment="一句话摘要")
+    content = Column(Text, nullable=False, comment="文章正文（支持Markdown）")
+    category = Column(String(50), nullable=True, comment="分类: term/formula/practice/faq")
+    icon = Column(String(10), default="📖", comment="图标")
+    related_page = Column(String(200), nullable=True, comment="关联页面路由，如 /maps/canvas/:id, /kpis, /budget, /deviations, /predict, /maps-review")
+    sort_order = Column(Integer, default=0, comment="排序")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())