A slideshow across a page: pictures the full width of the screen, captions over them

slideshow on a page: max_height in svh, slides with an image (a path
in the content repo or https), a caption laid over the picture's foot,
and optionally the picture's size so its place is held before it
loads. Swiper upgrades it; before that it is a row that scrolls.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GT37Z1Xtfd9pUuQtMTg6Yt

CHANGELOG.md

@@ -8,6 +8,8 @@ content repos pin the tag they run (see the end of this file).
 
 - Trainer: `documents` in a plan. A text the site carries word for word (bylaws, terms) becomes a page of its own where every section is one alternative: its heading the card's, its paragraphs the card's words, from a markdown file beside the plan. No model touches it.
 
+- `slideshow` on a page: a strip of pictures the full width of the screen under the question, `max_height` in svh, each picture with its caption laid over it. Swiper when the bundle has loaded, a sideways-scrolling row before. `/site/` serves `jpeg`, and lets a browser keep photographs for an hour.
+
 ## 0.6.0 (2026-09-30)
 
 - One binary. The lint (uhhm/iris) and the trainer (uhhm/portal-trainer) are commands of `portal`: `portal serve` (the default), `portal lint`, and `portal plan`, `build`, `answer`, `rate`, `prefer`, `score`, `simulate`, `compare`, `report`, `generate`. Same source, same version, so the site, the lint and the trainer never disagree about what content means; both histories are merged in. The release attaches the bare `portal` binary beside the tarball, so a content repo's CI downloads it and runs `portal lint`. No more iris releases; the pins that exist keep working. The trainer's `plans/`, `intakes/`, `engines/`, `sectors/` and its reference prompt live here now; its `runs/` stay in uhhm/portal-trainer. Docs gained "Training a site" and "The lint".