feat: v0.4 画布编辑器——拖拽布置分格v1

- WindoorCanvas editable模式: 加竖梃/横梃点击玻璃区域实时分割
- 多边形两次交叉点法分割, mm.sp分割线记录同步, 撤销栈
- 订单详情: 编辑分格后保存图纸(PUT orders/{id})
- 样板库: 另存为我的样板(POST windoor/templates, 企业隔离)
- 10个API端点回归全部通过

src/huamenchuang/api/windoor.py

@@ -52,6 +52,25 @@ async def search_templates(
     } for t in items])
 
 
+@router.post("/templates")
+async def save_template(body: dict, db: DbSession, user: CurrentUser):
+    """保存自定义样板（编辑器另存）。body: {name, catelog_id, drawing_data, note?}"""
+    from pydantic import ValidationError
+    from huamenchuang.schemas.windoor import TemplateSave
+    try:
+        data = TemplateSave(**body)
+    except (ValidationError, TypeError):
+        return fail("参数错误: 需要 name 与 drawing_data")
+    t = WindoorTemplate(
+        name=data.name, drawing_data=data.drawing_data, pic_url="",
+        catelog_id=data.catelog_id or 0, note=data.note or "",
+        is_default=0, company_id=user.company_id,
+    )
+    db.add(t)
+    await db.flush()
+    return ok(data={"id": t.id}, message="样板已保存")
+
+
 @router.get("/templates/{template_id}")
 async def template_detail(template_id: int, db: DbSession, user: CurrentUser):
     """模板详情：返回 drawing_data（画布可直接 openFile 渲染）。"""

src/huamenchuang/schemas/windoor.py

@@ -0,0 +1,9 @@
+"""样板库 schemas。"""
+from pydantic import BaseModel, Field
+
+
+class TemplateSave(BaseModel):
+    name: str = Field(min_length=1, max_length=128)
+    drawing_data: str = Field(min_length=2)
+    catelog_id: int | None = None
+    note: str = ""