fix: 修复KPITemplate模型映射(独立表)+模板API 500

backend/app/models/__init__.py

@@ -307,5 +307,21 @@ class KPIHierarchy(Base):
 
 
 # 兼容性: P2开发新增的模板API需要的模型
-# KPIDefinition 已存在，KPITemplate映射到同一定义
-KPITemplate = KPIDefinition
+# KPI模板（独立表）
+class KPITemplate(Base):
+    __tablename__ = "kpi_templates"
+    id = Column(Integer, primary_key=True, index=True)
+    kpi_code = Column(String(50), unique=True, nullable=False)
+    kpi_name = Column(String(200), nullable=False)
+    dimension = Column(String(50))
+    category = Column(String(50))
+    formula = Column(Text)
+    formula_desc = Column(String(500))
+    unit = Column(String(50))
+    target_value = Column(Float)
+    description = Column(Text)
+    is_system = Column(Integer, default=0)
+    usage_count = Column(Integer, default=0)
+    created_by = Column(Integer)
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())