sync: 同步 sql-platform-pro 最新代码 — 权限体系安全修复 v0.8.1

- P0: 实例访问控制全线接入权限组 (829测试)
- P1: permissions字段激活 + 操作级权限检查 (843测试)
- 前端: 删除数据权限页面, 权限组合并为唯一入口
- 新增: CodeMirror编辑器 + 查询模板 + 慢查询分析
- 新增: MongoDB管理页面 + Dashboard增强
- 修复: Pydantic V2迁移 + 前端TS错误修复

backend/app/models/workflow.py

@@ -0,0 +1,55 @@
+"""审批流程模型 — 支持多级、并行、条件审批。"""
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey, func
+from sqlalchemy.orm import relationship
+
+from app.core.database import Base
+
+
+class WorkflowDefinition(Base):
+    """审批流程定义模板。"""
+    __tablename__ = "workflow_definitions"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(100), nullable=False)
+    description = Column(Text, nullable=True)
+    is_default = Column(Boolean, default=False)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime, server_default=func.now())
+
+    steps = relationship("WorkflowStep", back_populates="workflow",
+                         order_by="WorkflowStep.step_number",
+                         cascade="all, delete-orphan")
+
+
+class WorkflowStep(Base):
+    """审批步骤定义。"""
+    __tablename__ = "workflow_steps"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    workflow_id = Column(Integer, ForeignKey("workflow_definitions.id"), nullable=False)
+    step_number = Column(Integer, nullable=False)
+    name = Column(String(100), nullable=False)
+    step_type = Column(String(20), nullable=False, default="serial")  # serial / parallel / any_one
+    approver_role = Column(String(20), nullable=True)  # admin / dba / manager
+    approver_ids = Column(Text, nullable=True)  # JSON list of specific user ids
+    is_required = Column(Boolean, default=True)
+    timeout_hours = Column(Integer, default=24)
+    auto_approve_on_timeout = Column(Boolean, default=False)
+
+    workflow = relationship("WorkflowDefinition", back_populates="steps")
+
+
+class TicketApproval(Base):
+    """工单审批实例（运行时记录）。"""
+    __tablename__ = "ticket_approvals"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    ticket_id = Column(Integer, ForeignKey("tickets.id"), nullable=False)
+    step_number = Column(Integer, nullable=False)
+    step_name = Column(String(100), nullable=True)
+    approver_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    approver_role = Column(String(20), nullable=True)
+    action = Column(String(20), default="pending")  # pending / approved / rejected / transferred / skipped
+    comment = Column(Text, nullable=True)
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())