Config settings auto-save on a 550ms debounce with no undo. The
'Enabled Toolsets' list is rendered by the generic ConfigField with no
destructive-change guard, so a stray select-all + Backspace (or any edit
that empties the list) is persisted the moment Settings closes —
silently disabling memory, terminal, web search, delegation, and most
tools. Recovery required CLI intervention.
Guard the one destructive transition: when the enabled-toolsets list
goes from non-empty to empty, window.confirm() before applying it (the
same pattern env-var removal already uses in toolset-config-panel.tsx).
Every other edit passes through untouched.
The decision is a pure helper (clearsEnabledToolsets) so it is unit
tested directly rather than through a full settings render. New i18n key
toolsetsWipeConfirm added to en + zh; partial locales inherit the
English string via defineLocale fallback.
Fixes#73319
PRATHAMESH75
8e35ff0a62