refactor(server): 移除鉴权并归档遗留路由至 legacy/

- 删除 auth.py 与 deps.py，各路由去除 get_current_user 依赖
- collection.py 更名为 materials.py，冻结链路（ozon/publish/shops/categories）移入 legacy/
- 扩展默认生图服务端口并入 8800 并自动迁移旧配置，水印默认文案改为 Panda Store
- 新增 docs/v2.1/backend-structure.md 后端结构盘点文档

server/legacy/services/publish.py

@@ -0,0 +1,80 @@
+"""发布：组装 ImportProductsV3 items[0] + 必填校验 + 轮询回填。"""
+# ⚠️ 冻结代码（Ozon API 直传链路）：保留不维护，V2.1 起接口保留但不再投入。
+from __future__ import annotations
+
+from models import Product
+
+
+def _fmt(v) -> str:
+    if v is None:
+        return ""
+    return str(v)
+
+
+def validate_ready(product: Product) -> list[str]:
+    """返回缺失/非法必填项的中文提示列表；空列表表示可发布。"""
+    missing: list[str] = []
+    if not product.offer_id.strip():
+        missing.append("货号 offer_id")
+    if not product.name.strip():
+        missing.append("商品名 name")
+    if not product.description.strip():
+        missing.append("描述 description")
+    if not product.description_category_id:
+        missing.append("类目 description_category_id")
+    if product.price is None or product.price <= 0:
+        missing.append("售价 price")
+    if not product.weight or product.weight <= 0:
+        missing.append("重量 weight")
+    for label, val in (("长 depth", product.depth), ("宽 width", product.width), ("高 height", product.height)):
+        if not val or val <= 0:
+            missing.append(label)
+    if not product.images:
+        missing.append("主图 images（至少 1 张）")
+    elif any(u and u.startswith("http://") for u in product.images):
+        missing.append("图片链接必须使用 https（Ozon 不接受 http 直链）")
+    return missing
+
+
+def _with_model_name(product: Product) -> list:
+    """把 raw.model_name 自动注入为 attribute 9048（型号名称），用于多变体合并。"""
+    attrs = list(product.attributes or [])
+    model_name = (product.raw or {}).get("model_name") if product.raw else None
+    if not model_name:
+        return attrs
+    # 已手动映射 9048 就不重复添加
+    for a in attrs:
+        if isinstance(a, dict) and a.get("id") == 9048:
+            return attrs
+    attrs.append({"complex_id": 0, "id": 9048, "values": [{"value": model_name}]})
+    return attrs
+
+
+def build_import_item(product: Product) -> dict:
+    item: dict = {
+        "offer_id": product.offer_id,
+        "name": product.name,
+        "description": product.description,
+        "description_category_id": product.description_category_id,
+        "price": _fmt(product.price),
+        "old_price": _fmt(product.old_price),
+        "currency_code": product.currency_code or "CNY",
+        "vat": product.vat or "0",
+        "depth": product.depth,
+        "width": product.width,
+        "height": product.height,
+        "dimension_unit": product.dimension_unit or "mm",
+        "weight": product.weight,
+        "weight_unit": product.weight_unit or "g",
+        "images": product.images or [],
+        "primary_image": product.primary_image or "",
+        "images360": product.images360 or [],
+        "color_image": product.color_image or "",
+        "attributes": _with_model_name(product),
+        "complex_attributes": product.complex_attributes or [],
+    }
+    if product.type_id:
+        item["type_id"] = product.type_id
+    if product.barcode:
+        item["barcode"] = product.barcode
+    return item