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/services/suite_service.py

@@ -0,0 +1,86 @@
+"""套图业务逻辑（从 api/suite.py 下沉）：文本素材转换 / 模型校验 / 生成图回写商品素材。
+
+api 层只留参数校验与调用；本模块可独立测试。
+"""
+from __future__ import annotations
+
+import uuid
+
+from schemas.suite import TextMaterial
+from services.tasks import TaskImage
+
+
+def texts_to_raw(texts: list[TextMaterial]) -> dict:
+    """前端组装的文本素材 → prompt 上下文用的 raw dict（后写的覆盖先写的）。"""
+    raw: dict = {}
+    for t in texts:
+        if t.kind == "title" and t.content:
+            raw["title"] = t.content
+        elif t.kind == "price" and t.content:
+            raw["price"] = t.content
+        elif t.kind == "brand" and t.content:
+            raw["brand"] = t.content
+        elif t.kind == "params" and t.pairs:
+            merged = {p["key"]: p["value"] for p in (raw.get("params") or [])}
+            for p in t.pairs:
+                merged.setdefault(p["key"], p["value"])
+            raw["params"] = [{"key": k, "value": v} for k, v in merged.items()]
+        elif t.kind == "selling_point" and t.content:
+            raw["sellingPoints"] = t.content
+        elif t.kind == "desc" and t.content:
+            raw["desc"] = t.content
+        elif t.kind == "sales" and t.content:
+            raw["sales"] = t.content
+        elif t.kind == "shop" and t.content:
+            raw["shop"] = t.content
+    return raw
+
+
+def validate_model(provider_name: str, model: str | None) -> None:
+    """按 provider 校验模型名白名单，不合法抛 ValueError。"""
+    from schemas.suite import RIGHTAPI_MODELS, TONGYI_MODELS
+
+    if provider_name == "tongyi" and model and model not in TONGYI_MODELS:
+        raise ValueError(f"不支持的模型: {model}（tongyi 支持: {TONGYI_MODELS}）")
+    if provider_name == "rightapi" and model and model not in RIGHTAPI_MODELS:
+        raise ValueError(f"不支持的模型: {model}（rightapi 支持: {RIGHTAPI_MODELS}）")
+
+
+async def append_generated_asset(product_id: str, image: TaskImage) -> str | None:
+    """把一张生成完成的图追加为 product_assets(generated)，并累加 asset_counts。返回 asset_id。
+
+    作为 run_suite 的逐张回调使用（签名须为 (image)），调用方用 partial 绑定 product_id。
+    """
+    from sqlalchemy import func, select
+
+    from db import get_session_factory
+    from models import Product, ProductAsset
+
+    pid = uuid.UUID(product_id)
+    async with get_session_factory()() as db:
+        count = await db.scalar(
+            select(func.count(ProductAsset.id)).where(
+                ProductAsset.product_id == pid,
+                ProductAsset.group_key == "generated",
+            )
+        )
+        asset = ProductAsset(
+            product_id=pid,
+            group_key="generated",
+            variant_name=None,
+            sort_order=count or 0,
+            type="img",
+            source_url="",
+            stored_url=image.url,
+            status="uploaded",
+        )
+        db.add(asset)
+        await db.flush()
+
+        product = await db.get(Product, pid)
+        if product is not None:
+            counts = dict(product.asset_counts or {})
+            counts["generated"] = int(counts.get("generated") or 0) + 1
+            product.asset_counts = counts
+        await db.commit()
+        return str(asset.id)