fix: 完善交互、知识库目录与 Windows 运行库提示

tests/component/cache-cleanup.test.tsx

@@ -0,0 +1,42 @@
+import { render, screen, waitFor } from '@testing-library/react'
+import userEvent from '@testing-library/user-event'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { CacheCleanupPage } from '../../src/renderer/src/features/settings/pages/CacheCleanupPage'
+
+const api = {
+  getCacheSummary: vi.fn(),
+  clearCache: vi.fn(),
+  openKnowledgeDirectory: vi.fn()
+}
+
+describe('CacheCleanupPage', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    Object.defineProperty(window, 'api', { configurable: true, value: api })
+    api.getCacheSummary.mockResolvedValue({
+      items: [
+        {
+          id: 'knowledge',
+          label: '本地知识库索引',
+          description: '问一问微信使用的本地检索索引',
+          sizeBytes: 1024,
+          fileCount: 1
+        }
+      ],
+      totalBytes: 1024,
+      updatedAt: Date.now()
+    })
+    api.openKnowledgeDirectory.mockResolvedValue({ success: true })
+  })
+
+  it('opens the real knowledge directory without clearing it', async () => {
+    const onNotice = vi.fn()
+    render(<CacheCleanupPage onNotice={onNotice} />)
+
+    await userEvent.click(await screen.findByRole('button', { name: '打开文件夹' }))
+
+    await waitFor(() => expect(api.openKnowledgeDirectory).toHaveBeenCalledOnce())
+    expect(api.clearCache).not.toHaveBeenCalled()
+    expect(onNotice).toHaveBeenCalledWith('已打开知识库文件夹')
+  })
+})