cursor position change when using ArrowDown/ArrowUp in n-auto-complete

[lanyeeee]

Describe the bug

When using the n-auto-complete component, pressing the keyboard ArrowDown/ArrowUp to navigate through dropdown options causes the cursor position in the input field to unexpectedly change.

For example, if the cursor is initially positioned in the middle of the input text, after pressing ArrowDown, the cursor jumps to the end of the text, disrupting the user's typing experience.

Steps to reproduce

1. Open any naive-ui auto-complete component example (such as the official website demo)
2. Enter some text in the auto-complete input field (e.g., test example)
3. Position the cursor in the middle of the input text (e.g., test| example)
4. Press ArrowDown or ArrowUp to navigate through dropdown options
5. Observe the cursor position change

Link to minimal reproduction

https://www.naiveui.com/en-US/os-theme/components/auto-complete

System Info

System:
    OS: Windows 11 10.0.26100
    CPU: (16) x64 AMD Ryzen 7 5800X3D 8-Core Processor
    Memory: 36.77 GB / 63.89 GB
  Binaries:
    Node: 22.13.1 - D:\Program Files\nodejs\node.EXE
    npm: 10.9.2 - D:\Program Files\nodejs\npm.CMD
    pnpm: 9.15.5 - ~\AppData\Roaming\npm\pnpm.CMD
  Browsers:
    Edge: Chromium (132.0.2957.140)
  npmPackages:
    vue: ~3.5.13 => 3.5.13

Used Package Manager

pnpm

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.