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/homepageMapper.test.ts

@@ -0,0 +1,95 @@
+import { describe, test, expect } from 'vitest';
+import { toHomepageView } from './homepageMapper';
+
+/**
+ * 单元测试: toHomepageView
+ */
+describe('toHomepageView', () => {
+  test('convert raw data to HomepageView correctly', () => {
+    const rawData: Homepage = {
+      id: 1,
+      carousel: [
+        {
+          id: 1,
+          directus_files_id: {
+            id: 'file-uuid-1',
+          },
+        },
+        {
+          id: 2,
+          directus_files_id: {
+            id: 'file-uuid-2',
+          },
+        },
+      ],
+      recommend_products: [
+        {
+          id: 1,
+          translations: [{ id: 1, name: 'Product 1', summary: 'Summary 1' }],
+          cover: {
+            id: 'cover-file-uuid-1',
+          },
+        },
+        {
+          id: 2,
+          translations: [{ id: 2, name: 'Product 2', summary: 'Summary 2' }],
+          cover: {
+            id: 'cover-file-uuid-2',
+          },
+        },
+      ],
+      recommend_solutions: [
+        {
+          id: 1,
+          translations: [{ id: 1, title: 'Solution 1', summary: 'Summary 1' }],
+          cover: {
+            id: 'cover-file-uuid-1',
+          },
+        },
+      ],
+    };
+
+    expect(toHomepageView(rawData)).toEqual({
+      id: 1,
+      carousel: ['file-uuid-1', 'file-uuid-2'],
+      recommendProducts: [
+        {
+          id: 1,
+          name: 'Product 1',
+          summary: 'Summary 1',
+          cover: 'cover-file-uuid-1',
+        },
+        {
+          id: 2,
+          name: 'Product 2',
+          summary: 'Summary 2',
+          cover: 'cover-file-uuid-2',
+        },
+      ],
+      recommendSolutions: [
+        {
+          id: 1,
+          title: 'Solution 1',
+          summary: 'Summary 1',
+          cover: 'cover-file-uuid-1',
+        },
+      ],
+    });
+  });
+
+  test('convert raw data with missing translations', () => {
+    const rawData: Homepage = {
+      id: 1,
+      carousel: [],
+      recommend_products: [{ id: 1, translations: [], cover: null }],
+      recommend_solutions: [{ id: 1, translations: [], cover: null }],
+    };
+
+    expect(toHomepageView(rawData)).toEqual({
+      id: 1,
+      carousel: [],
+      recommendProducts: [{ id: 1, name: '', summary: '', cover: '' }],
+      recommendSolutions: [{ id: 1, title: '', summary: '', cover: '' }],
+    });
+  });
+});