Close the 0.9.3 UI polish milestone

Add deterministic captures 14-21 for the remaining screen-design states, fix the panel/button layout issues they exposed, and record 21/21 compare and judge results. Bump the source to 0.9.3 and move the completed milestone to DONE.md.

CHANGELOG.md

@@ -4,7 +4,14 @@ All notable user-facing changes to Gig Line. The format follows
 [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and versions use
 Semantic Versioning.
 
-## [Unreleased]
+## [0.9.3] — 2026-11-02
+
+### Added
+
+- Eight committed gallery captures now cover the start menu, pause, settings,
+  shift review, emergency radio, action wheel, crowd panic and responder
+  arrival, so every screen-design reference has a deterministic current-build
+  capture.
 
 ### Changed