panel: align paired domain settings and export actions

Subgrid Domain settings rows, match Address mode and trusted-IP controls,
and pin Export/Danger buttons to a shared baseline in split cards.

Co-authored-by: Cursor <cursoragent@cursor.com>

CHANGELOG.md

@@ -11,8 +11,9 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); version
   (`N messages / Ws — Settings`) and in message-limit labels; Settings uses a
   code-row for the L1 value. Domain and application rate-limit status uses the
   shared `st` badge. Trusted-IP help sits under the IP field; domain rate-limit
-  help sits above Save; Address mode drops the duplicate field label; field-pair
-  top spacing aligns with paired DMARC labels.
+  help sits above Save; Address mode / trusted-IP columns share muted leads and
+  matched control height; Domain settings uses subgrid so DMARC and rate-limit
+  rows line up; paired `.split` cards pin primary actions to a shared baseline.
 
 ## [1.2.4] - 2026-08-12