test: 优化测试代码

- 显式导入相关依赖以避免相关问题

server/utils/search-converters.test.ts

@@ -0,0 +1,77 @@
+import { describe, expect, test } from 'vitest';
+import { converters } from './search-converters';
+
+/**
+ * 单元测试: converters
+ */
+describe('converters', () => {
+  test('convert product item', () => {
+    const item = {
+      id: 1,
+      name: 'Hydraulic Pump',
+      summary: 'High efficiency',
+      description: 'Detailed description',
+      type: 'pump',
+    };
+    const result = converters.products(item);
+    expect(result).toEqual({
+      id: 1,
+      type: 'product',
+      title: 'Hydraulic Pump',
+      summary: 'High efficiency',
+    });
+  });
+
+  test('convert solution item', () => {
+    const item = {
+      id: 1,
+      title: 'Solution A',
+      summary: 'Effective solution',
+      content: 'Detailed content',
+      type: 'Type A',
+    };
+    const result = converters.solutions(item);
+    expect(result).toEqual({
+      id: 1,
+      type: 'solution',
+      title: 'Solution A',
+      summary: 'Effective solution',
+    });
+  });
+
+  test('convert question item', () => {
+    const item = {
+      id: 1,
+      title: 'How to use product?',
+      content:
+        'This is a detailed explanation of how to use the product effectively.',
+      products: ['Product A'],
+      product_types: ['Type A'],
+    };
+    const result = converters.questions(item);
+    expect(result).toEqual({
+      id: 1,
+      title: 'How to use product?',
+      summary:
+        'This is a detailed explanation of how to use the product effectively....',
+      type: 'question',
+    });
+  });
+
+  test('convert product document item', () => {
+    const item = {
+      id: 1,
+      title: 'User Manual',
+      products: ['Product A'],
+      product_types: ['Type A'],
+      fileUUID: 'TEST-UUID',
+    };
+    const result = converters.product_documents(item);
+    expect(result).toEqual({
+      id: 'TEST-UUID',
+      title: 'User Manual',
+      summary: '',
+      type: 'document',
+    });
+  });
+});