feat(keybindings): mirror the C-; command family under C-c ;

C-; is GUI-only: terminals can't encode Control-semicolon, so the whole custom command family (calendar, AI, Slack, org, pearl, jump, and the rest) was unreachable in a terminal frame (emacs -nw, emacsclient -nw, or Emacs inside vterm/tmux). I bound the single cj/custom-keymap under C-c ; alongside C-;, so the same leaf keys reach the identical map in both GUI and TTY with no relearning and no per-module edits. C-c is the standard user prefix and always TTY-encodable. I audited every leaf key in the family and they're all TTY-safe (letters, digits, punctuation, SPC, and arrow keys), so nothing needed remapping.

2 files changed, 37 insertions, 0 deletions

diff --git a/modules/keybindings.el b/modules/keybindings.el
index db4800876..b61c3f2b3 100644
--- a/modules/keybindings.el
+++ b/modules/keybindings.el
@@ -35,6 +35,10 @@
 (defvar-keymap cj/custom-keymap
   :doc "User custom prefix keymap base for nested keymaps.")
 (keymap-global-set "C-;" cj/custom-keymap)
+;; C-; is GUI-only; terminals can't encode Control-semicolon.  Mirror the same
+;; keymap under C-c ; (the standard user prefix, always TTY-encodable) so the
+;; whole command family works in a terminal frame with no leaf-key relearning.
+(keymap-global-set "C-c ;" cj/custom-keymap)
 
 ;; ------------------------ Custom Keymap Registration -------------------------
 
diff --git a/tests/test-keybindings-tty-mirror.el b/tests/test-keybindings-tty-mirror.el
new file mode 100644
index 000000000..f63024c0b
--- /dev/null
+++ b/tests/test-keybindings-tty-mirror.el
@@ -0,0 +1,33 @@
+;;; test-keybindings-tty-mirror.el --- TTY mirror prefix for the C-; family -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; The personal prefix C-; is GUI-only — terminals can't encode Control-semicolon,
+;; so the whole custom command family is unreachable in a TTY frame (emacs -nw,
+;; emacsclient -nw, Emacs inside vterm/tmux).  keybindings.el binds the single
+;; `cj/custom-keymap' under a TTY-safe mirror prefix C-c ; alongside C-;, so the
+;; same leaf keys reach the identical map in both GUI and terminal.  These tests
+;; pin that load-time global binding.
+
+;;; Code:
+
+(require 'ert)
+
+(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
+(require 'keybindings)
+
+(ert-deftest test-keybindings-tty-mirror-gui-prefix-resolves ()
+  "Normal: the GUI prefix C-; resolves to cj/custom-keymap globally."
+  (should (eq (keymap-lookup (current-global-map) "C-;") cj/custom-keymap)))
+
+(ert-deftest test-keybindings-tty-mirror-tty-prefix-resolves ()
+  "Normal: the TTY mirror C-c ; resolves to the same cj/custom-keymap."
+  (should (eq (keymap-lookup (current-global-map) "C-c ;") cj/custom-keymap)))
+
+(ert-deftest test-keybindings-tty-mirror-both-prefixes-share-one-map ()
+  "Boundary: both prefixes point at the identical keymap object, so a leaf
+key registered once is reachable under either prefix."
+  (should (eq (keymap-lookup (current-global-map) "C-;")
+              (keymap-lookup (current-global-map) "C-c ;"))))
+
+(provide 'test-keybindings-tty-mirror)
+;;; test-keybindings-tty-mirror.el ends here