fix(eat): forward word-motion arrows to the terminal in agent buffers

C-/M-left/right were in EAT's default eat-semi-char-non-bound-keys, so they fell through to Emacs and ran left-word/right-word, moving point in the EAT buffer instead of being sent to the program. The terminal's own cursor never moved, so the next keystroke snapped point back to the real cursor -- the "cursor jumps back" symptom when editing claude's input. Bind them to eat-self-input so they forward as word motion, the way ghostel did. Window arrows (S-, C-M-) still reach Emacs for windmove and buffer-move.

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/test-term-tmux-history.el b/tests/test-term-tmux-history.el
index c7154e5d..1dbf6b0b 100644
--- a/tests/test-term-tmux-history.el
+++ b/tests/test-term-tmux-history.el
@@ -288,5 +288,13 @@ returns to semi-char from EAT's emacs/char mode -- one exit key for both."
       (cj/term-send-escape)
       (should (equal sent '("\e"))))))
 
+(ert-deftest test-term-word-motion-arrows-forwarded-not-window-arrows ()
+  "Normal: C-/M-left/right forward to the terminal (word motion in the program's
+input) instead of moving Emacs point; windmove's S-arrows still reach Emacs."
+  (dolist (key '("C-<left>" "C-<right>" "M-<left>" "M-<right>"))
+    (should (eq (keymap-lookup eat-semi-char-mode-map key) #'eat-self-input)))
+  (dolist (key '("S-<left>" "S-<right>"))
+    (should-not (eq (keymap-lookup eat-semi-char-mode-map key) #'eat-self-input))))
+
 (provide 'test-term-tmux-history)
 ;;; test-term-tmux-history.el ends here