feat(tmux): inline tab-name format, remove script

Replace external tab-name.sh with a tmux format string that
shows pane_current_path for shell processes and
pane_current_command otherwise, truncated to 15 chars.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

home/.tmux.conf

@@ -94,4 +94,4 @@ set -g lock-after-time 180
 set -g lock-command 'eval $(grep active_total ${TMPDIR:-/tmp}/.tmux_heartbeat 2>/dev/null); ~/.tmux/donut ${active_total:-0}'
 set -g automatic-rename on
 set -g allow-rename off
-set -g automatic-rename-format '#(~/.tmux/tab-name.sh "#{pane_current_command}" "#{b:pane_current_path}")'
+set -g automatic-rename-format '#{=/15/…:#{?#{||:#{m:zsh,#{pane_current_command}},#{||:#{m:bash,#{pane_current_command}},#{||:#{m:fish,#{pane_current_command}},#{m:sh,#{pane_current_command}}}}},#{b:pane_current_path},#{pane_current_command}}}'

home/.tmux/tab-name.sh

@@ -1,29 +0,0 @@
-#!/usr/bin/env bash
-# Tab name for tmux automatic-rename.
-# Usage: tab-name.sh <command> <dirname>
-# Shows dirname for shells, command for everything else. Truncates at 15 with ….
-
-cmd="$1"
-dir="$2"
-max=15
-
-case "$cmd" in
-    zsh|bash|fish|sh) name="$dir" ;;
-    *) name="$cmd" ;;
-esac
-
-# In Codespaces, show friendly name without trailing random ID
-# Codespace names: "adjective-noun-id" where id is alphanumeric gibberish
-if [[ -n "$CODESPACE_NAME" ]]; then
-    friendly="${CODESPACE_NAME%-*}"
-    # If no hyphen was found, use full name
-    [[ "$friendly" == "$CODESPACE_NAME" ]] && friendly="$CODESPACE_NAME"
-    echo "cs:${friendly}"
-    exit 0
-fi
-
-if (( ${#name} > max )); then
-    echo "${name:0:$max}…"
-else
-    echo "$name"
-fi