tmux: enable OSC52 clipboard support for mosh

Configures tmux to pass through OSC52 clipboard sequences for mosh/ssh
connections. Mosh 1.4.0+ supports OSC52 but requires the c; option that
tmux doesn't send by default.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: arthurnn

tmux.conf

@@ -2,6 +2,10 @@ set -g default-shell /usr/bin/zsh
 
 setw -g mouse on
 
+# Enable OSC52 clipboard support for mosh/ssh
+set -g set-clipboard on
+set -ag terminal-overrides "vte*:XT:Ms=\\E]52;c;%p2%s\\7,xterm*:XT:Ms=\\E]52;c;%p2%s\\7"
+
 # emacs friendly keybindings
 set -g mode-keys emacs
 #set -g prefix C-x