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/contactInfoMapper.test.ts

@@ -0,0 +1,34 @@
+import { describe, test, expect } from 'vitest';
+import { toContactInfoView } from './contactInfoMapper';
+
+/**
+ * 单元测试: contactInfoMapper
+ */
+describe('contactInfoMapper', () => {
+  const baseData: ContactInfo = {
+    id: 1,
+    translations: [{ id: 10, content: 'This is raw data of contact info' }],
+  };
+  test('convert raw data to ContactInfoView correctly', () => {
+    const rawData: ContactInfo = {
+      ...baseData,
+    };
+
+    expect(toContactInfoView(rawData)).toEqual({
+      id: 1,
+      content: 'This is raw data of contact info',
+    });
+  });
+
+  test('convert raw data with missing translations', () => {
+    const rawData: ContactInfo = {
+      ...baseData,
+      translations: [],
+    };
+
+    expect(toContactInfoView(rawData)).toEqual({
+      id: 1,
+      content: '',
+    });
+  });
+});