Jordan Pittman 0e8f075ca2
Fix source map generation during when watching files on the CLI (#19373)
Fixes #19362

We were overwriting the source map with the "decoded" map returned by
the compiler but didn't wrap it in the helper intended to help inline vs
file maps. This resulted in two issues:
1. `undefined` being appended to the CSS file when using `--map`
2. `undefined` being passed to `writeFile(…)` when using `--map <file>`

This PR fixes both.
2025-11-25 12:22:57 -05:00
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