Keep focus and the confirmation in place around a Quest log removal

After a removal, focus moves to the remove button of the dinner now in
the removed one's place, the one before it when it was the last, or the
Quest log sheet when none is left, instead of the removed row's detached
button. While the DELETE is pending, the confirmation can no longer be
dismissed: Confirm gains a dismissible prop that disables the cancel
button and ignores Escape and the scrim.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/settings/LeaveGuard.tsx

@@ -36,6 +36,9 @@ type ConfirmProps = {
   confirmLabel: string
   cancelLabel?: string
   busy?: boolean
+  // When false, the cancel button, Escape and the scrim do nothing, so the
+  // sheet stays until the action settles.
+  dismissible?: boolean
   error?: string | null
   onCancel: () => void
   onConfirm: () => void
@@ -49,13 +52,17 @@ export function Confirm({
   confirmLabel,
   cancelLabel = 'Cancel',
   busy = false,
+  dismissible = true,
   error = null,
   onCancel,
   onConfirm,
 }: ConfirmProps) {
   const titleId = useId()
+  function dismiss() {
+    if (dismissible) onCancel()
+  }
   return (
-    <Sheet open={open} onClose={onCancel} aria-labelledby={titleId}>
+    <Sheet open={open} onClose={dismiss} aria-labelledby={titleId}>
       <div className={styles.sheet}>
         <h2 id={titleId} className={styles.title}>
           {title}
@@ -67,7 +74,7 @@ export function Confirm({
           </p>
         )}
         <div className={styles.actions}>
-          <Button variant="outline" onClick={onCancel}>
+          <Button variant="outline" disabled={!dismissible} onClick={onCancel}>
             {cancelLabel}
           </Button>
           <Button disabled={busy} onClick={onConfirm}>