refactor: 将Data到ViewModel的转换由App转移至Server端

- 将逻辑转移到Server端后，简化前端逻辑

server/mappers/documentMapper.ts

@@ -0,0 +1,76 @@
+/**
+ * 将 Directus 返回的 Document 数据转换为 ProductDocumentView 视图模型
+ *
+ * @param raw: 原始的 Document 数据
+ * @returns 转换后的 ProductDocumentView 对象
+ *
+ * @example
+ * const view = toProductDocumentView(rawDocument);
+ */
+export function toProductDocumentView(
+  raw: ProductDocument
+): ProductDocumentView {
+  const trans = raw.translations?.[0];
+  const file = isObject<DirectusFile>(raw.file) ? raw.file : undefined;
+  const fileId = file?.id ?? '';
+
+  const url = `/api/assets/${fileId}`;
+
+  return {
+    id: raw.id,
+    fileId: fileId,
+    filename: file?.filename_download ?? '',
+    title: trans?.title ?? '',
+    url: url,
+    size: file?.filesize ?? 0,
+  };
+}
+
+/**
+ * 将 Directus 返回的 Document 数据转换为 DocumentListView 视图模型
+ *
+ * @param raw: 原始的 Document 数据
+ * @returns 转换后的 DocumentListView 对象
+ *
+ * @example
+ * const view = toDocumentListView(rawDocument);
+ */
+export function toDocumentListView(raw: ProductDocument): DocumentListView {
+  const trans = raw.translations?.[0];
+
+  const file = isObject<DirectusFile>(raw.file) ? raw.file : undefined;
+  const fileId = file?.id ?? '';
+
+  const url = `/api/assets/${fileId}`;
+
+  const related_products: DocumentListProduct[] = (raw.products ?? [])
+    .filter(isObject<ProductsProductDocument>)
+    .map((item) => item.products_id)
+    .filter(isObject<Product>)
+    .map((item) => {
+      const productType = isObject<ProductType>(item.product_type)
+        ? ({
+            id: item.product_type.id,
+            name: item.product_type.translations?.[0]?.name ?? '',
+          } satisfies DocumentListProductType)
+        : ({
+            id: -1,
+            name: '',
+          } satisfies DocumentListProductType);
+      return {
+        id: item.id,
+        name: item.translations?.[0]?.name ?? '',
+        type: productType,
+      };
+    });
+
+  return {
+    id: raw.id,
+    fileId: fileId,
+    filename: file?.filename_download ?? '',
+    title: trans?.title ?? '',
+    url: url,
+    size: file?.filesize ?? 0,
+    products: related_products,
+  };
+}