refactor(org-noter-config): rebind insert-note to n; sync to angle brackets

`cj/org-noter-insert-note-dwim' is the most-used action in a noter
session; it deserves the doubled-prefix letter.  Move it from
`C-; n i' to `C-; n n'.

Sibling-stepping moves off `n'/`p' (which were sync-next /
sync-prev) onto the angle-bracket pair `>'/`<' to free up `n' and
to read more naturally as direction.  `.' stays as
sync-current-note.

Updated `which-key' labels to match.  Four new ERT tests in
`tests/test-org-noter-config-keymap.el' lock the keymap shape so a
casual edit doesn't silently drift the layout.

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/test-org-noter-config-keymap.el b/tests/test-org-noter-config-keymap.el
new file mode 100644
index 00000000..1ad2ada9
--- /dev/null
+++ b/tests/test-org-noter-config-keymap.el
@@ -0,0 +1,43 @@
+;;; test-org-noter-config-keymap.el --- Lock the cj/org-noter-map shape -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; Pins the bindings under `C-; n' so a casual edit doesn't drift the
+;; layout without intent.  Mnemonic: the most-used action (insert
+;; note) sits on the doubled-prefix letter `n', sibling-stepping goes
+;; on the angle-bracket pair, and `.' stays the "this entry" key.
+
+;;; Code:
+
+(require 'ert)
+
+(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
+(require 'org-noter-config)
+
+(ert-deftest test-org-noter-keymap-insert-note-on-doubled-n ()
+  "Normal: `C-; n n' invokes the insert-note command (the most-used
+action, on the doubled-prefix letter)."
+  (should (eq (keymap-lookup cj/org-noter-map "n")
+              #'cj/org-noter-insert-note-dwim)))
+
+(ert-deftest test-org-noter-keymap-sync-siblings-on-angle-brackets ()
+  "Normal: sibling-stepping lives on `>' (next) and `<' (prev).
+The angle brackets read naturally as direction; this freed up `n'
+and `p' for the insert and other future actions."
+  (should (eq (keymap-lookup cj/org-noter-map ">")
+              #'org-noter-sync-next-note))
+  (should (eq (keymap-lookup cj/org-noter-map "<")
+              #'org-noter-sync-prev-note)))
+
+(ert-deftest test-org-noter-keymap-sync-current-stays-on-dot ()
+  "Normal: `.' still invokes `org-noter-sync-current-note'."
+  (should (eq (keymap-lookup cj/org-noter-map ".")
+              #'org-noter-sync-current-note)))
+
+(ert-deftest test-org-noter-keymap-no-stale-i-binding ()
+  "Regression: the old `i' binding for insert-note is gone (insert
+moved to `n').  Leaving `i' around would create two ways to invoke
+the same command and a stale which-key hint."
+  (should-not (keymap-lookup cj/org-noter-map "i")))
+
+(provide 'test-org-noter-config-keymap)
+;;; test-org-noter-config-keymap.el ends here