feat: implement gloss-core data layer

Public API: gloss-core-lookup, gloss-core-save, gloss-core-list, gloss-core-find-buffer-position. Save inserts entries at the alphabetical position (case-insensitive compare), creates the file and parent directory on first call, prompts on collision via completing-read over Replace/Append/Cancel, and updates the in-memory cache directly.

Lookup checks gloss-file's mtime against the cached load time. If disk is newer than the buffer, it reverts the buffer first. Out-of-band edits land on the next read. Parser failures during reload preserve the existing cache and surface a one-line message.

Tested by the 32-test suite from the previous commit. All 32 pass in 0.16 seconds.

The defgroup and defcustoms (gloss-file, gloss-debug) live here rather than in gloss.el. That keeps the data layer self-contained when tests load it directly without the orchestration layer.

1 files changed, 3 insertions, 16 deletions

diff --git a/gloss.el b/gloss.el
index 20aacb1..baf4712 100644
--- a/gloss.el
+++ b/gloss.el
@@ -56,22 +56,9 @@
 (require 'gloss-display)
 (require 'gloss-drill)
 
-(defgroup gloss nil
-  "Personal glossary with online-sourced definitions."
-  :group 'tools
-  :prefix "gloss-")
-
-(defcustom gloss-file
-  (expand-file-name "gloss.org" (or (bound-and-true-p org-directory)
-                                    user-emacs-directory))
-  "Path to the glossary org file."
-  :type 'file
-  :group 'gloss)
-
-(defcustom gloss-debug nil
-  "When non-nil, write diagnostic events to *gloss-debug*."
-  :type 'boolean
-  :group 'gloss)
+;; The `gloss' defgroup, `gloss-file', and `gloss-debug' defcustoms live in
+;; `gloss-core' so they are defined whenever the data layer is required —
+;; tests load `gloss-core' directly without pulling in the orchestration here.
 
 (defvar gloss-prefix-map (make-sparse-keymap)
   "Keymap for `gloss' commands.  Default prefix: C-h g.")