DnsTab now exposes every field the legacy panel did — top-level toggles
(tag, hosts, queryStrategy, disableCache/queryConcurrency, fallback
strategy, client subnet), the servers table with per-row strategy and
domain/expectIP/unexpectedIP overrides, and the Fake DNS pool. The new
DnsServerModal covers the full add/edit flow and collapses to a bare
string when the user only sets an address — matching the wire shape
the legacy form emits for plain DNS entries like "8.8.8.8".
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>