feat(backend): 实现多租户数据隔离与权限管理架构

refactor(backend): 重构模型基类支持租户与客户隔离
feat(backend): 添加客户模块相关模型、CRUD和参数校验
docs(backend): 新增SaaS数据隔离设计方案文档
refactor(backend): 优化日志模块并添加类型注解
fix(backend): 修正字典模块查询参数移除creator字段

style(frontend): 统一按钮组件代码格式
fix(frontend): 修复表格序号计算逻辑
chore(frontend): 更新lint脚本使用pnpm替代npm

backend/app/api/v1/module_system/log/model.py

@@ -1,28 +1,66 @@
 # -*- coding: utf-8 -*-
 
-from typing import Optional
+from typing import TYPE_CHECKING
 from sqlalchemy import String, Integer, Text
-from sqlalchemy.orm import Mapped, mapped_column
+from sqlalchemy.orm import relationship, Mapped, mapped_column
 
-from app.core.base_model import CreatorMixin
+from app.core.base_model import ModelMixin, UserMixin, TenantMixin, CustomerMixin
+
+if TYPE_CHECKING:
+    from app.api.v1.module_system.tenant.model import TenantModel
+    from app.api.v1.module_system.customer.model import CustomerModel
+    from app.api.v1.module_system.user.model import UserModel
 
 
-class OperationLogModel(CreatorMixin):
-    """ 
-    系统日志
+class OperationLogModel(ModelMixin, UserMixin, TenantMixin, CustomerMixin):
     """
-    __tablename__ = "system_log"
-    __table_args__ = ({'comment': '系统日志表'})
-    __loader_options__ = ["creator"]
+    系统日志模型
+    
+    日志隔离策略:
+    ===========
+    - 日志记录操作人的实际租户和客户信息
+    - tenant_id: 记录操作人所属租户(必填)
+    - customer_id: 记录操作人所属客户(如果是客户用户)
+    
+    用于审计和追踪:
+    - 系统用户操作: tenant_id=1, customer_id=NULL
+    - 租户用户操作: tenant_id>1, customer_id=NULL
+    - 客户用户操作: tenant_id>1, customer_id>1
+    
+    日志类型:
+    - 1: 登录日志
+    - 2: 操作日志
+    """
+    __tablename__: str = "system_log"
+    __table_args__: dict[str, str] = ({'comment': '系统日志表'})
+    __loader_options__: list[str] = ["creator"]
 
     type: Mapped[int] = mapped_column(Integer, comment="日志类型(1登录日志 2操作日志)")
     request_path: Mapped[str] = mapped_column(String(255), comment="请求路径")
     request_method: Mapped[str] = mapped_column(String(10), comment="请求方式")
-    request_payload: Mapped[Optional[str]] = mapped_column(Text, comment="请求体")
-    request_ip: Mapped[Optional[str]] = mapped_column(String(50), comment="请求IP地址")
-    login_location: Mapped[Optional[str]] = mapped_column(String(255), comment="登录位置")
-    request_os: Mapped[Optional[str]] = mapped_column(String(64), nullable=True, comment="操作系统")
-    request_browser: Mapped[Optional[str]] = mapped_column(String(64), nullable=True, comment="浏览器")
+    request_payload: Mapped[str | None] = mapped_column(Text, comment="请求体")
+    request_ip: Mapped[str | None] = mapped_column(String(50), comment="请求IP地址")
+    login_location: Mapped[str | None] = mapped_column(String(255), comment="登录位置")
+    request_os: Mapped[str | None] = mapped_column(String(64), nullable=True, comment="操作系统")
+    request_browser: Mapped[str | None] = mapped_column(String(64), nullable=True, comment="浏览器")
     response_code: Mapped[int] = mapped_column(Integer, comment="响应状态码")
-    response_json: Mapped[Optional[str]] = mapped_column(Text, nullable=True, comment="响应体")
-    process_time: Mapped[Optional[str]] = mapped_column(String(20), nullable=True, comment="处理时间")
+    response_json: Mapped[str | None] = mapped_column(Text, nullable=True, comment="响应体")
+    process_time: Mapped[str | None] = mapped_column(String(20), nullable=True, comment="处理时间")
+    
+    # 关联关系 (继承自UserMixin, TenantMixin, CustomerMixin)
+    tenant: Mapped["TenantModel"] = relationship(
+        foreign_keys="OperationLogModel.tenant_id",
+        lazy="selectin"
+    )
+    customer: Mapped["CustomerModel | None"] = relationship(
+        foreign_keys="OperationLogModel.customer_id",
+        lazy="selectin"
+    )
+    created_by: Mapped["UserModel | None"] = relationship(
+        foreign_keys="OperationLogModel.created_id",
+        lazy="selectin"
+    )
+    updated_by: Mapped["UserModel | None"] = relationship(
+        foreign_keys="OperationLogModel.updated_id",
+        lazy="selectin"
+    )