全栈修复: remark字段全链路打通 — TaskCreate+TransferRequest+transfer_task+前端Payload

backend/app/schemas/task.py

@@ -18,6 +18,7 @@ class TaskCreate(BaseModel):
     assignee_id: str | None = Field(None, max_length=64, description="负责人ID(逻辑外键→老系统)")
     notify_parent_on_complete: bool = Field(False, description="完成后是否通知父任务")
     is_rework: bool = Field(False, description="是否为返工任务")
+    remark: str | None = Field(None, max_length=2000, description="初始描述/交接备注")
 
     model_config = {"from_attributes": True}
 
@@ -52,10 +53,17 @@ class TaskRejectRequest(BaseModel):
     reason: str = Field(..., min_length=1, max_length=500, description="驳回原因（必填）")
 
 
+class TaskTransferBranch(BaseModel):
+    """裂变分支"""
+    task_name: str = Field(..., max_length=200, description="工序名称")
+    assignees: list[str] = Field(..., min_length=1, description="接收人列表")
+
+
 class TaskTransferRequest(BaseModel):
-    """完工裂变转交请求"""
-    next_assignees: list[str] = Field(..., min_length=1, description="下一道工序接收人列表（必填）")
-    next_task_name: str = Field(..., min_length=1, max_length=200, description="下一道工序名称（必填）")
+    """完工裂变转交请求 — 支持多分支 next_tasks 和旧版单线兼容"""
+    next_assignees: list[str] | None = Field(None, description="[旧版] 下一道工序接收人列表")
+    next_task_name: str | None = Field(None, max_length=200, description="[旧版] 下一道工序名称")
+    next_tasks: list[TaskTransferBranch] | None = Field(None, description="[新版] 多分支任务列表")
     note: str | None = Field(None, description="交接备注")