[Bug]: Sync fails when no posts exist and pretty URLs + posts prefix are set

[bttrx]

Operating system

Linux Mint 22 MATE

Publii version

0.46.2 (build 16966)

Post editor

None

Bug description

See title. I agree, it's a corner case, but it should not happen anyway.

Steps to reproduce

1. Create a new site
2. Configure server
3. Enable 'Use pretty URLs'
4. Set a posts prefix, e.g., 'posts' or 'blog'
5. Do not create a post
6. Click 'Sync your website'
7. Receive 1st error message (see 'Relevant log output')
8. Click 'Preparation error'
9. Select 'Cancel'
10. Receive 2nd error message:

Relevant log output

Rendering process failed
An error occurred during rendering process:

ENOENT: no such file or directory, scandir '/home/robert/Dokumente/Publii/sites/test/output/posts'

Error: ENOENT: no such file or directory, scandir '/home/robert/Dokumente/Publii/sites/test/output/posts'
    at Object.readdirSync (node:fs:1506:26)
    at t.readdirSync (node:electron/js2c/node_init:2:13703)
    at Sitemap.getFilesList (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/modules/render-html/helpers/sitemap.js:220:24)
    at Sitemap.create (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/modules/render-html/helpers/sitemap.js:49:20)
    at Renderer.generateSitemap (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/modules/render-html/renderer.js:2047:32)
    at Renderer.generateWWW (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/modules/render-html/renderer.js:277:24)
    at async Renderer.renderFullPreview (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/modules/render-html/renderer.js:193:9)
    at async Renderer.renderSite (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/modules/render-html/renderer.js:174:17)
    at async Renderer.render (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/modules/render-html/renderer.js:119:13)
    at async process. (/tmp/.mount_Publii2YVWMN/resources/app.asar/back-end/workers/renderer/preview.js:17:22)