Correct stale conventions in AGENTS.md and README

The site is no longer noindex (removed in 3b93e86); only branding.html
is excluded. Videos use preload="auto", not "none". Fix AGENDTS.md typo.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: chlab

AGENTS.md

@@ -40,5 +40,5 @@ docs/
 - Colors: white `#ffffff`, purple `#221c35`, red `#e6443b`
 - Font: Open Sans (self-hosted, no Google Fonts CDN)
 - Images below the fold use `loading="lazy"`. Service icons and the header logo do not.
-- Videos use `preload="none"` and are played/paused via a scroll listener in JS.
-- The site is currently set to `noindex` (meta tag + robots.txt). See README for the go-live checklist.
+- Videos use `preload="auto"` and are played/paused via a scroll listener in JS.
+- The site is indexed by search engines. Only `branding.html` is excluded (meta `noindex` + `Disallow` in `robots.txt`) since it's unlisted.

README.md

@@ -2,7 +2,7 @@
 
 Static website for [schaltstelle.ch](https://schaltstelle.ch).
 
-The site lives in `docs/` because GitHub Pages only supports serving from `/` (root) or `/docs`. This keeps repo-level files like `AGENDTS.md` and `README.md` out of the public URL.
+The site lives in `docs/` because GitHub Pages only supports serving from `/` (root) or `/docs`. This keeps repo-level files like `AGENTS.md` and `README.md` out of the public URL.
 
 ## Structure