Router mode hash doesn't work with --with-clicks option when exporting to PDF

[biozz]

Describe the bug

When exporting slides with option --with-clicks and routerMode: 'hash' SliDev doesn't generate a slide per page for each click.

To Reproduce

1. Create new slidev project
2. Install playwright-chromium
3. Go to package.json and add --with-clicks option to the export script.
4. Replace the contents of the slides.md with:

---
layout: default
routerMode: 'hash'
---

<v-clicks depth="2">

- 1
  - 1.1
- 2

</v-clicks>

5. Export the slides (pn export in my case)
6. Open the PDF.

The PDF contains 1 slide.

Now comment-out routerMode and export again. The PDF contains 4 slides, as expected.

Desktop (please complete the following information):

• OS: MacOS X 14
• Browser: whatever version of Chromium comes with Playwright in playwright-chromium version 1.44.0
• Slidev version: 0.49.2

---

If I may, one possible solution for the issue is to ignore routerMode when exporting. SliDev spins up its own server and there is no user interaction or any strict requirements about how the router should work.