docs: gokapi RedirectUrl + default_creds follow-ups

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 2026-06-23 — gokapi: index redirect + admin username display
+- **gokapi**: seed `RedirectUrl` repointed from Gokapi's GitHub default → `https://${SUBDOMAIN}.${DOMAIN}/admin`.
+  Gokapi's bare root `/` redirects to `RedirectUrl`; the controller's "Megnyitás" link is always the bare
+  subdomain root, so it was landing on Gokapi's GitHub instead of the app. Now `/` → `/admin` → login.
+  Applied to the live demo (config.json edit + restart) and the seed (future deploys).
+- **gokapi**: added `app_info.default_creds` ("Felhasználó: admin · jelszó a Beállítások oldalon") so the
+  app-info page shows the initial admin user like other apps; fixed `first_steps` (no more setup wizard).
+
 ## 2026-06-23 — gokapi reproducible headless setup (fixes public "maintenance mode")
 - **gokapi**: was stuck in "maintenance mode" on the public URL since first deploy — Gokapi's one-time
   `/setup` wizard was never completed, and (verified against the docs + the v1.9.6 binary) **no Gokapi