fix(desktop): 补齐顶部段落菜单与浮动按钮布局

frontend/src/components/common/TitleBarMenu.spec.ts

@@ -0,0 +1,42 @@
+// @vitest-environment happy-dom
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+import { createPinia, setActivePinia } from 'pinia'
+import { useEditorStore } from '@/stores/editor'
+import TitleBarMenu from './TitleBarMenu.vue'
+
+const execute = vi.hoisted(() => vi.fn())
+vi.mock('@/services/editorCommandService', () => ({ executeEditorCommand: execute }))
+
+beforeEach(() => {
+  setActivePinia(createPinia())
+  execute.mockReset().mockResolvedValue({ ok: true })
+})
+
+describe('桌面顶部段落菜单', () => {
+  it('源码笔记通过统一编辑命令执行属性导入', async () => {
+    const editor = useEditorStore()
+    editor.mode = 'source'
+    editor.currentFilePath = '/示例.md'
+    editor.saveStatus = 'saved'
+    const wrapper = mount(TitleBarMenu)
+    await wrapper.get('.menu-trigger').trigger('click')
+    const item = wrapper.get('[role="menuitem"]')
+    expect((item.element as HTMLButtonElement).disabled).toBe(false)
+    await item.trigger('click')
+    expect(execute).toHaveBeenCalledWith('editor.import-note-properties')
+    expect(wrapper.find('[role="menu"]').exists()).toBe(false)
+    wrapper.unmount()
+  })
+
+  it('写作模式显示入口但禁止绕过编辑器能力', async () => {
+    const editor = useEditorStore()
+    editor.mode = 'wysiwyg'
+    editor.currentFilePath = '/示例.md'
+    const wrapper = mount(TitleBarMenu)
+    await wrapper.get('.menu-trigger').trigger('click')
+    expect((wrapper.get('[role="menuitem"]').element as HTMLButtonElement).disabled).toBe(true)
+    expect(wrapper.text()).toContain('请在无冲突的 Markdown 源码笔记中使用')
+    wrapper.unmount()
+  })
+})