Checkbox state interference between todo lists separated by horizontal rules

[neevop]

Pre-submission Checklist

• I have searched the existing issues and this bug has not been reported yet
• I have tested this issue on the demo site or the latest version

Where did you encounter this bug?

Latest stable version (self-hosted)

Memos Version

v0.26.1

Bug Description

When creating multiple todo lists separated by horizontal rules (---), checking/unchecking items in one list incorrectly affects the state of items in the other list. The checkbox interaction seems to have index conflicts across separated sections.

Steps to Reproduce

Create a new memo with the following content:

## test todo checkbox

- [ ] todo 1-1
- [ ] todo 1-2

---

- [ ] todo 2-1
- [ ] todo 2-2

Save the memo
Click on the checkbox of "todo 1-2" to mark it as completed
Observe the state of items in the second list (after the ---)

Expected Behavior

No response

Screenshots & Additional Context

No response