fix(tmux): move clear macro off C-k to C-/ so apps get Ctrl+K

[drn]

What

bind -n C-k in home/tmux.conf was swallowing Ctrl+K at the tmux root key table and rewriting it to Ctrl+L before any TUI app could see it — which broke the argus task switcher (and any other app that wants Ctrl+K).

This moves the clear-screen + clear-history macro off Ctrl+K onto Ctrl+/, bound as both C-/ and C-_ to cover the two ways terminals encode Ctrl+/. Ctrl+K now passes straight through to the running program.

# clear window binding (C-/ ; bind both encodings since terminals send C-/ or C-_)
bind -n C-/ send-keys C-l \; run-shell "sleep 0.3" \; clear-history
bind -n C-_ send-keys C-l \; run-shell "sleep 0.3" \; clear-history

Why on master

This change was already live in the running tmux server and committed to the root branch of the main checkout, but root is a stale shadow of master and this is the only genuinely new commit on it. Landing it here puts it on the primary branch.

Verification note

If your terminal uses the Kitty keyboard protocol (ghostty, kitty, recent WezTerm/foot), Ctrl+/ may arrive as a CSI-u sequence that neither C-/ nor C-_ catches — confirm Ctrl+/ actually clears, and switch to a plain Ctrl+letter if not.

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com

[drn]

Superseded: the tmux clear-macro rebind already landed on master (commit e4b8737, after a history-rewrite that scrubbed an unrelated 20MB bin/hera binary and a broken absolute-path symlink bundled into the original direct push). Closing as redundant.