VS Code Preview not working if path contains special characters

Bug description

If the path to the .qmd contains special character, e.g., ~/temp/name;with@symbols, Quarto Preview does not work because it doesn't escape the characters.

Steps to reproduce

1. Create a folder with special characters, e.g., mkdir "name;with@symbols".
2. Open this folder in VS Code (File → Open Folder) and create a .qmd file. The content doesn't matter, here's a minimal document:

---
title: "Untitled"
format: html
---

Test.

3. Save the .qmd and run "Quarto: Preview"

Actual behavior

I get an error because the special characters are not escaped:

~/temp/name;with@symbols ❯ quarto preview /Users/clemens/temp/name;with@symbols/Untitled-1.qmd --no-browser --no-watch-inputs
ERROR: /Users/clemens/temp/name not found

Expected behavior

The preview should render successfully even if the path contains special characters. The solution is pretty straightforward, just escape special characters, or even easier, enclose the path argument in double quotes.

~/temp/name;with@symbols ❯ quarto preview "/Users/clemens/temp/name;with@symbols/Untitled-1.qmd" --no-browser --no-watch-inputs

Your environment

• IDE: VSCode
• OS: macOS Tahoe 26.6.2
• Quarto version: 1.10.18

Start at the VS Code “Quarto: Preview” command and trace how the .qmd path becomes the quarto preview process argument. Reproduce with a folder such as name;with@symbols, then verify the path is passed as one argument and the preview renders successfully.