Pull Request resolves #47679

• I read the Generative AI policy and my contribution is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

This PR fixes a Windows-specific issue in the Joomla build process where npm install / asset build fails due to invalid ESM import paths.

On Windows, absolute file paths like:

C:\Users\...

were passed directly into dynamic import() calls. Node.js ESM loader requires valid URLs (file:// scheme), which caused the error:

Error [ERR_UNSUPPORTED_ESM_URL_SCHEME]

To resolve this:

• All dynamic imports using file paths are converted using:

  pathToFileURL(resolvedPath).href

• Paths are normalized using path.resolve()

• Fixed JSON module import in TinyMCE builder

• Updated Rollup config in Codemirror builder using inlineDynamicImports: true to avoid multi-chunk output errors

This ensures the build works correctly on Windows systems.

Testing Instructions

1. Clone Joomla repository on Windows
2. Switch to 6.2-dev branch
3. Run:

npm install

Actual result BEFORE applying this Pull Request

• npm install fails during build
• Error:

Error [ERR_UNSUPPORTED_ESM_URL_SCHEME]

• In some cases:

RollupError: Invalid value for option "output.file"

Screenshot (Before Fix)

Expected result AFTER applying this Pull Request

• npm install completes successfully
• All build steps execute without errors
• Joomla assets are generated correctly

Screenshot (After Fix)

Additional Context

While testing, it was observed that running:

composer install

may fail if required PHP extensions (gd, sodium, ldap and zip) are missing.
This is an environment setup issue and not related to this bug, but it may affect contributors during setup.

Link to documentations

Relevant references:

• Joomla development docs:
  https://developer.joomla.org/

• Node.js ESM documentation (import specifiers):
  https://nodejs.org/api/esm.html#urls

• Rollup output configuration:
  https://rollupjs.org/configuration-options/#output-inlineDynamicImports

• No documentation changes for guide.joomla.org needed

• No documentation changes for manual.joomla.org needed