fix(theme-studio): name exported themes from the source filename

The converter took the theme name from the JSON's internal name field, so every draft whose field read "theme" overwrote theme-theme.el. It now uses the JSON file's basename, so WIP.json becomes WIP-theme.el and each draft lands under its own name. The reload target derives the load name from the basename too, and a regression test pins it: the filename wins over the internal field.

1 files changed, 6 insertions, 4 deletions

diff --git a/scripts/theme-studio/build-theme.el b/scripts/theme-studio/build-theme.el
index 786a3d960..827129976 100644
--- a/scripts/theme-studio/build-theme.el
+++ b/scripts/theme-studio/build-theme.el
@@ -246,11 +246,13 @@ Signal a `file-missing' error when JSON-FILE does not exist."
 
 (defun build-theme/convert-file (json-file &optional out-dir)
   "Convert JSON-FILE (a theme.json export) into a deftheme file.
-Write themes/<name>-theme.el, where <name> is the JSON name field, into
-OUT-DIR (default: the themes/ directory of this repo).  Return the written
-path."
+Write themes/<name>-theme.el, where <name> is JSON-FILE's basename, into
+OUT-DIR (default: the themes/ directory of this repo).  The basename names the
+theme so each export lands under its own file (sterling.json -> sterling-theme.el),
+rather than colliding on whatever the JSON's internal name field happens to be.
+Return the written path."
   (let* ((data (build-theme/--parse json-file))
-         (name (build-theme/--obj-get data 'name))
+         (name (file-name-base json-file))
          (specs (build-theme/--all-specs data))
          (dir (or out-dir
                   (expand-file-name