全栈: Task模型+remark字段 + 前端任务卡片初始说明展示区

backend/app/models/task.py

@@ -69,6 +69,9 @@ class Task(Base):
     is_rework: Mapped[bool] = mapped_column(
         Boolean, default=False, comment="是否为返工任务",
     )
+    remark: Mapped[str | None] = mapped_column(
+        String(2000), nullable=True, comment="任务初始描述/交接备注",
+    )
 
     # ---- 关系 ----
     product: Mapped["Product"] = relationship("Product", lazy="selectin")

backend/app/schemas/task.py

@@ -102,6 +102,7 @@ class TaskSummaryResponse(BaseModel):
     status: str
     notify_parent_on_complete: bool
     is_rework: bool = False
+    remark: str | None = None
     reject_reason: str | None = None
     received_at: datetime | None = None
     completed_at: datetime | None = None