feat(theme-studio): auto-dim split preview

auto-dim-other-buffers is a package face, not a theme face, so build-inventory.el (it scans only elpa/straight packages) never listed it and the studio couldn't theme it. This adds it as a bespoke app.

The preview is a vertical split: the focused window on the left in real syntax colors, the same code on the right collapsed to the single auto-dim-other-buffers face, the way Emacs renders a non-selected window. Both panes follow the language selector. A trailing row shows auto-dim-other-buffers-hide, whose foreground matches the background so it vanishes when dimmed.

A #autodimtest gate covers the split, the uniform recolor, and language sync.

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/theme-studio/run-tests.sh b/scripts/theme-studio/run-tests.sh
index f6a68c41b..2a6d332ac 100755
--- a/scripts/theme-studio/run-tests.sh
+++ b/scripts/theme-studio/run-tests.sh
@@ -55,7 +55,7 @@ CHROME=""
 for c in google-chrome-stable google-chrome chromium chromium-browser; do
   if command -v "$c" >/dev/null 2>&1; then CHROME="$c"; break; fi
 done
-HASHES="selftest cursortest readouttest deltatest oklchtest planetest locktest sorttest mocktest contrasttest safetest healtest columntest counttest baseedittest roundtriptest beveltest previewlinktest generatortest"
+HASHES="selftest cursortest readouttest deltatest oklchtest planetest locktest sorttest mocktest contrasttest safetest healtest columntest counttest baseedittest roundtriptest beveltest previewlinktest generatortest autodimtest"
 if [ "$NO_BROWSER" = 1 ]; then
   skip_msg "browser hash gates (--no-browser)"
 elif [ -z "$CHROME" ]; then