feat: improve task note markdown editor

frontend/src/lib/task-utils.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { buildTaskRecurrencePayload, buildTaskRrule, classifyTaskForToday, defaultTaskDueAt, filterTasks, groupTaskTree, isSameTaskSortTier, moveItemWithinScope, parseTaskRecurrence, parseTaskRrule, renderMarkdown, toDateTimeLocal } from './task-utils'
+import { applyMarkdownFormat, buildTaskRecurrencePayload, buildTaskRrule, classifyTaskForToday, defaultTaskDueAt, filterTasks, groupTaskTree, isSameTaskSortTier, moveItemWithinScope, parseTaskRecurrence, parseTaskRrule, renderMarkdown, toDateTimeLocal } from './task-utils'
 
 type SearchTask = {
   id: string
@@ -86,14 +86,25 @@ describe('task utilities', () => {
     expect(buildTaskRecurrencePayload('none', { afterCompletionDays: '1' })).toEqual({})
   })
 
-  it('renders safe basic markdown and strips unsafe html', () => {
-    const html = renderMarkdown('# Plan\n**bold** [link](https://example.com)\n<script>alert(1)</script>')
+  it('renders safe practical markdown and strips unsafe html', () => {
+    const html = renderMarkdown('# Plan\n> Note\n1. first\n- [x] done\n\n```js\nconst x = 1\n```\n**bold** [link](https://example.com)\n<script>alert(1)</script>')
     expect(html).toContain('<h1>Plan</h1>')
+    expect(html).toContain('<blockquote>Note</blockquote>')
+    expect(html).toContain('<ol><li>first</li></ol>')
+    expect(html).toContain('type="checkbox" disabled checked')
+    expect(html).toContain('<pre><code class="language-js">const x = 1</code></pre>')
     expect(html).toContain('<strong>bold</strong>')
     expect(html).toContain('rel="noopener noreferrer"')
     expect(html).not.toContain('<script>')
   })
 
+  it('inserts markdown around selections and prefixes selected lines', () => {
+    expect(applyMarkdownFormat('hello', 0, 5, 'bold')).toEqual({ value: '**hello**', start: 2, end: 7 })
+    expect(applyMarkdownFormat('one\ntwo', 0, 7, 'bullet')).toEqual({ value: '- one\n- two', start: 2, end: 11 })
+    expect(applyMarkdownFormat('', 0, 0, 'link')).toEqual({ value: '[链接文字](https://)', start: 1, end: 5 })
+    expect(applyMarkdownFormat('work', 0, 4, 'task')).toEqual({ value: '- [ ] work', start: 6, end: 10 })
+  })
+
   it('filters titles, descriptions, and list names', () => {
     const searchable: SearchTask[] = [
       ...tasks,