Option to disable copy-on-select when mouse_capture is enabled

[voidwarriorchan]

(Reposting from #992 as a discussion, per the contributing guidelines.)

Problem

With ui.mouse_capture = true, finishing a mouse drag-selection in a pane always writes the selection to the system clipboard. There is no way to select text (e.g. just to highlight or visually mark something) without clobbering the current clipboard contents.

Proposal

Add a config option such as:

[ui]
copy_on_select = false

When disabled, drag-selection would still highlight text, but copying would require an explicit action (double-click token copy, copy mode y, or a context-menu/keybinding copy).

Default true keeps the current tmux-style behavior.

Environment

• herdr 0.7.1 (Homebrew, stable channel), macOS, Ghostty

[RickTorresJr]

+1

Related threads for anyone searching:
#992 same request, auto-closed only because it was filed on the issue tracker
#710 Q&A asking how to disable this
#748 adjacent: let copy-on-select target PRIMARY instead of CLIPBOARD