Fix two highlighted fields in the add dialog when unmonitoring

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

internal/ui/form.go

@@ -60,3 +60,33 @@ func focusedDropDown(f *tview.Form, item int) (*tview.DropDown, bool) {
 	dd, ok := f.GetFormItem(item).(*tview.DropDown)
 	return dd, ok
 }
+
+// bindSearchNow keeps a "Search now" checkbox consistent with whether a search
+// can find anything. While searchable() is false the box is unchecked, greyed
+// out and cannot be ticked (blocked is called instead); it returns to the
+// user's earlier choice afterwards. The returned function must be called
+// whenever the answer of searchable() may have changed.
+//
+// tview's SetDisabled is avoided on purpose: on a form item it re-triggers
+// the form's focus handling and leaves two fields highlighted.
+func bindSearchNow(box *tview.Checkbox, searchable func() bool, blocked func()) (sync func()) {
+	want := true
+	box.SetChangedFunc(func(checked bool) {
+		switch {
+		case searchable():
+			want = checked
+		case checked:
+			box.SetChecked(false)
+			blocked()
+		}
+	})
+	return func() {
+		if searchable() {
+			box.SetLabelColor(tview.Styles.SecondaryTextColor)
+			box.SetChecked(want)
+			return
+		}
+		box.SetLabelColor(tcell.ColorGray)
+		box.SetChecked(false)
+	}
+}