Incorrect URLs generated in directory listing page for nested folders when filenames are numeric

[nitin2953]

Five Server’s built-in directory listing page generates incorrect anchor URLs when browsing a nested directory that contains files with numeric-only names (e.g. 1.html, 2.html).
This issue does not occur at the root (http://localhost:5500/), only inside subdirectories.

Steps to Reproduce

1. Create the following structure:

   root/
     1.html
     2.html
     3.html
     TODO.md
     test/
       1.html
       2.html
       3.html
       TODO.md
   

2. Start Five Server & go to http://localhost:5500/.

3. Open http://localhost:5500/test/.

4. Click links in the auto-generated directory listing.

Actual Result
Links in the listing are incorrect:

1.html   => //test/1.html/
TODO.md => //test/TODO.md/.preview

Expected Result
Links should resolve correctly, for example:

/test/1.html OR http://localhost:5500/test/1.html
/test/TODO.md.preview OR http://localhost:5500/test/TODO.md.preview

Notes

• Root directory listing (http://localhost:5500/) generates correct URLs.
• The issue appears related to path resolution in nested directories, especially with numeric filenames.
• No physical index.html exists; this is Five Server’s virtual directory listing page.

Environment

• OS: Windows
• VS Code: latest
• Five Server: latest
• Browser: Chrome