A left drag in the pane is turned into xterm's own selection (as Shift+drag does) instead of tmux copy-mode, which dropped the highlight on release. Copy on release with a toast; Ctrl+C copies when something is selected. Wheel scroll and status-line clicks still reach tmux. Closes #51 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WHRLCCdXYm41Qx5kNhehaP