The routing table hides balancer-loopback rules (`_bl_*`) but keeps each
visible row's original index in `key`, then handed antd's positional row
index straight to edit/delete/toggle/move/drag — all of which mutate the
full, unfiltered routing.rules array. Once a hidden loopback rule precedes a
visible one (e.g. a balancer whose fallback is another balancer, plus any
rule added afterwards), the positional index no longer matches the array
index, so deleting or editing a rule silently hit the wrong one — including
destroying the loopback rule that keeps the balancer alive.
Add originalRuleIndex to translate a positional row index back through the
row's `key`, and route every mutating handler (openEdit, confirmDelete,
toggleRule, moveUp/moveDown, drag) through it. When no loopback rows are
hidden the mapping is the identity, so ordinary configs are unaffected.
MHSanaei