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WCAG 4.1.2: add WebVTT caption support for <video> elements on tfe.php

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Problem: <video> elements on tfe.php had no <track kind="captions"> element,
violating WCAG 4.1.2 (name, role, value) for video content.

Changes:
- public/tfe.php: collect all text/vtt files from the thesis file list before
  rendering; skip standalone rendering of .vtt entries; for each MP4 emit a
  <track kind="captions" srclang="fr" label="Sous-titres" default> pointing
  to the N-th VTT file (N-th video paired with N-th caption in document order)
- public/media.php: add text/vtt to allowed MIME list; normalise finfo
  text/plain -> text/vtt for .vtt files; add vtt branch to cache/header
  block (Content-Type: text/vtt; charset=utf-8, 1-day cache)
- public/admin/actions/formulaire.php: allow .vtt uploads (text/vtt MIME,
  vtt extension); normalise text/plain finfo result; set file_type='caption'
  for VTT files so they are distinguishable from other thesis files
- public/admin/add.php: extend files field accept attr to include .vtt;
  update hint text to document the VTT sidecar convention

VTT files uploaded under theses/ inherit the same access_type visibility
gate in media.php as all other thesis content (403 for access_type_id=3).
This commit is contained in:
Pontoporeia
2026-04-03 13:24:26 +02:00
parent 6e68edfbff
commit 94e9060dc7
6 changed files with 58 additions and 8 deletions
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TODO.md
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@@ -11,6 +11,9 @@ Pending tasks have been split into topic files under [`todo/`](todo/README.md):
## Recently completed (this session)
- [x] WCAG 4.1.2 `<video>` captions — `tfe.php` now emits `<track kind="captions">` for each MP4 when a `.vtt` sidecar exists (N-th VTT paired with N-th video). `formulaire.php` accepts `.vtt` uploads (`file_type='caption'`, MIME normalised). `media.php` serves `text/vtt` with correct headers and visibility gating. Admin `add.php` file-field hint documents the `.vtt` upload convention.
- [x] `admin/edit.php` — WCAG 4.1.2: removed `mb_strimwidth` truncation from `$accessOptions` mapping; access type `<select>` options now include full description text (`name — description`) so the accessible name is unambiguous for screen readers
- [x] `public/assets/favicon.svg` — created public favicon: brand-purple (`#9557b5`) rounded square with white "P" lettermark; distinct from `admin_favicon.svg` (archive-restore icon in `#c104fc`)
- [x] `templates/head.php` — favicon `<link>` now selects `favicon.svg` (public) vs `admin_favicon.svg` (admin) based on `$isAdmin`; closes `todo/01-css-semantic-refactor.md` favicon task