resolve() replaces the first character with backslash in external links

[whataboutpereira]

Describe the bug

Running an external link through resolve() breaks them.

https://live.staticflickr.com/65535/54843647922_a6f731ef05_o.jpg

is transformed into

/ttps:/live.staticflickr.com/65535/54843647922_a6f731ef05_o.jpg

What's the recommended way of dealing with mixed internal and external links?

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-udv8spkf?file=src%2Froutes%2F%2Bpage.svelte

Logs

System Info

System:
    OS: Windows 11 10.0.26200
    CPU: (16) x64 Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz
    Memory: 2.20 GB / 15.91 GB
  Binaries:
    Node: 22.22.2 - C:\Users\reio\scoop\apps\nodejs22\current\node.EXE
    npm: 10.9.7 - C:\Users\reio\scoop\apps\nodejs22\current\npm.CMD
  Browsers:
    Chrome: 146.0.7680.178
    Edge: Chromium (140.0.3485.54)
    Firefox: 140.0.2 - C:\Program Files\Mozilla Firefox\firefox.exe
  npmPackages:
    @sveltejs/adapter-node: ^5.5.4 => 5.5.4
    @sveltejs/kit: ^2.57.1 => 2.57.1
    @sveltejs/vite-plugin-svelte: ^7.0.0 => 7.0.0
    svelte: ^5.55.2 => 5.55.2
    vite: ^8.0.8 => 8.0.8

Severity

serious, but I can work around it

Additional Information

No response