Add confirmation prompt when closing a tab

[Gandalf-Le-Dev]

idea / problem

Pressing close tab terminates the tab and its running process with no confirmation prompt.

requested change

A config option such as:

[ui]
confirm_close_tab = true

When enabled, pressing close tab, shows a confirmation prompt before closing, consistent with the existing confirm_close behavior for workspaces.

why you want this

Tabs frequently contain live processes — running servers, builds, log tails, AI agent. A single accidental keypress destroys that context with no recovery. The workspace-level guard (confirm_close) already exists and proves the pattern works; tabs need the same protection.

[poweroutlet2]

Made this simple plugin that opens a confirmation when you close a pane, similar to tmux: https://github.com/poweroutlet2/herdr-confirm-close-pane

It would be great if this was a built in option though.

[y-ykcd]

Also worth covering the mouse path: the tab context menu's Close item destroys the tab the same way, so a guard on the close-tab keybinding alone would still leave this open. Each of my tabs holds a running Claude Code agent, and losing one costs the whole session.

[sauron918]

+1
This seems critical, as an accidental key combination can lead to data/context loss