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/services/cms/productService.ts

@@ -0,0 +1,55 @@
+import {
+  toProductView,
+  toProductListView,
+} from '~~/server/mappers/productMapper';
+
+export const productService = {
+  async getProductList(locale: string) {
+    const query = await loadAssetAsString(
+      'assets/server',
+      'graphql/productList.graphql'
+    );
+    if (!query) {
+      throw createError({
+        statusCode: 500,
+        message: 'GraphQL query not found',
+      });
+    }
+
+    const data = await directus.query<{ products: Product[] }>(query, {
+      locale: locale,
+    });
+
+    const products = data?.products || [];
+
+    return products.map((product) => toProductListView(product));
+  },
+  async getProductById(id: string, locale: string) {
+    const query = await loadAssetAsString(
+      'assets/server',
+      'graphql/product.graphql'
+    );
+    if (!query) {
+      throw createError({
+        statusCode: 500,
+        message: 'GraphQL query not found',
+      });
+    }
+
+    const data = await directus.query<{ products_by_id: Product }>(query, {
+      id: id,
+      locale: locale,
+    });
+
+    const product = data?.products_by_id;
+
+    if (!product || product.status === 'archived') {
+      throw createError({
+        statusCode: 404,
+        statusMessage: 'Product not found',
+      });
+    }
+
+    return toProductView(product);
+  },
+};