0.2.4: version 0.2.4 — package.json / package-lock.json / APP_VERSION (DEV_BUILD turns false), README release form, CHANGELOG 0.2.4 — 2026-10-11 in the usual sections with credits, DESIGN versions line

docs/history/0.2.4.md

@@ -1,6 +1,6 @@
-# DESIGN §29 — 0.2.4 (development)
+# DESIGN §29 — 0.2.4
 
-Part of [DESIGN.md](../DESIGN.md). This chapter records changes after the 0.2.3 release, not a released version.
+Part of [DESIGN.md](../DESIGN.md). This chapter records 0.2.4, released on 2026-10-11.
 
 ## 29. Community follow-up