a11y(jury-fieldset): fix WCAG 3.3.2, 4.1.2, 2.1.1 + audit 1.4.4/1.4.12

3.3.2 Labels or instructions
- Replace bare <label>Lecteur·ices :</label> (no 'for', no associated control)
  with <fieldset class="admin-jury-lecteurs"><legend>Lecteur·ices</legend>
  giving AT a proper programmatic label for the entire lecteur group

4.1.2 Name, role, value — Externe checkboxes lacked group context
- Add aria-label="Promoteur·ice — externe" on the promoteur Externe checkbox
- Add aria-label="Lecteur·ice N — nom" on every lecteur name input
- Add aria-label="Lecteur·ice N — externe" on every lecteur Externe checkbox
- All three attributes added to both PHP-rendered rows and the addJuryRow() JS
  that builds new rows dynamically

2.1.1 Keyboard — remove buttons already had aria-label; verified and updated
  label text to "Supprimer le lecteur·ice N" (consistent with new numbering)

CSS (admin.css)
- Add .admin-body fieldset fieldset.admin-jury-lecteurs rule: removes
  border/padding/background from the nested fieldset so it reads as a
  sub-group inside the outer jury fieldset, not a double-bordered card

Audit (no code change)
- WCAG 1.4.4: all font-size values use rem — no px text sizing anywhere
- WCAG 1.4.12: only overflow:hidden on media containers and .sr-only utility;
  no essential text content is clipped by text-spacing overrides
- WCAG 4.1.2 bulk JS: result is a redirect to flash-messages.php which already
  emits role="alert"/role="status" — no additional JS announcement needed

TODO.md

@@ -7,28 +7,34 @@ Pending tasks have been split into topic files under [`todo/`](todo/README.md):
 | [todo/01-css-semantic-refactor.md](todo/01-css-semantic-refactor.md) | CSS class audit, semantic HTML (public + admin), inline style extraction, favicon |
 | [todo/02-php-components.md](todo/02-php-components.md) | Form field partials, shared UI partials, controller extraction, backend maintenance |
 | [todo/03-system-cache.md](todo/03-system-cache.md) | `system_cache` table, `SystemCache` class, `system.php` refactor |
-| [todo/04-accessibility.md](todo/04-accessibility.md) | WCAG 2.1 AA — remaining failures grouped by success criterion |
+| [todo/04-accessibility.md](todo/04-accessibility.md) | WCAG 2.1 AA - remaining failures grouped by success criterion |
 
 ## Recently completed (this session)
 
-- [x] `admin.css` — added `[aria-current="page"]` rule for admin nav links (`border-bottom: 2px solid currentColor; padding-bottom: 1px`) fixing WCAG 1.4.1 (active nav link had no non-colour indicator)
-- [x] `admin.css` — fixed undefined `--admin-purple` variable in pagination hover; replaced with `--accent-primary` (same `#9557b5` value)
-- [x] `todo/01-css-semantic-refactor.md` — audited all CSS/HTML refactor tasks; marked ~15 items as already-done (`.admin-main`, `.admin-page-title`, `.admin-form-row`, `.admin-label`, `.admin-input/select/textarea`, `.admin-table`, `.admin-fieldset`, `tfe.css` class replacements, `search.css` selector, `login.php`/`edit.php` inline styles, `admin-alert` replacement, form partial hints)
-- [x] `todo/04-accessibility.md` — marked WCAG 1.4.1 admin nav and `--admin-purple` audit items as completed
+- [x] `admin.css` - added `[aria-current="page"]` rule for admin nav links (`border-bottom: 2px solid currentColor; padding-bottom: 1px`) fixing WCAG 1.4.1 (active nav link had no non-colour indicator)
+- [x] `admin.css` - fixed undefined `--admin-purple` variable in pagination hover; replaced with `--accent-primary` (same `#9557b5` value)
+- [x] `todo/01-css-semantic-refactor.md` - audited all CSS/HTML refactor tasks; marked ~15 items as already-done (`.admin-main`, `.admin-page-title`, `.admin-form-row`, `.admin-label`, `.admin-input/select/textarea`, `.admin-table`, `.admin-fieldset`, `tfe.css` class replacements, `search.css` selector, `login.php`/`edit.php` inline styles, `admin-alert` replacement, form partial hints)
+- [x] `todo/04-accessibility.md` - marked WCAG 1.4.1 admin nav and `--admin-purple` audit items as completed
 
-- [x] `admin/index.php` — server-side pagination (25/page); `Database::getThesesListCount()` added; `getThesesList()` extended with `$limit`/`$offset`; `access_type` JOIN added to query (was missing); result-count meta line added; `.pagination-wrap` + `.pagination-btn` + `.pagination-info` styles added to `admin.css`
+- [x] `admin/index.php` - server-side pagination (25/page); `Database::getThesesListCount()` added; `getThesesList()` extended with `$limit`/`$offset`; `access_type` JOIN added to query (was missing); result-count meta line added; `.pagination-wrap` + `.pagination-btn` + `.pagination-info` styles added to `admin.css`
 
-- [x] `checkbox-list.php` — replaced `<div class="admin-checkbox-list">` with `<fieldset class="admin-checkbox-group"><legend class="sr-only">…</legend><ul>` (WCAG 1.3.1 fix)
-- [x] `admin.css` — replaced `.admin-checkbox-list` with `.admin-body fieldset.admin-checkbox-group > ul` semantic selectors; added `span.admin-row-label` as visible label column counterpart
-- [x] `login.php` — wrapped content in `<main id="main-content">` landmark
-- [x] `account.php` — `<div class="admin-account-status">` → `<dl>`; `__row` divs kept; `__label` spans → `<dt>`; `admin-danger-zone__description` div → `<p>`
-- [x] `index.php` — maintenance bar `<div>` → `<aside role="status" aria-label="Statut du site">`
-- [x] `add.php` / `edit.php` — `autocomplete="name"` on author field, `autocomplete="email"` on contact field
-- [x] `tags.php` — all inline `style=` attributes removed; sizing/spacing moved to CSS (`.admin-input--inline`, `.admin-select--inline`, `.admin-inline-form + .admin-inline-form`, `.admin-tags-count`)
+- [x] `checkbox-list.php` - replaced `<div class="admin-checkbox-list">` with `<fieldset class="admin-checkbox-group"><legend class="sr-only">...</legend><ul>` (WCAG 1.3.1 fix)
+- [x] `admin.css` - replaced `.admin-checkbox-list` with `.admin-body fieldset.admin-checkbox-group > ul` semantic selectors; added `span.admin-row-label` as visible label column counterpart
+- [x] `login.php` - wrapped content in `<main id="main-content">` landmark
+- [x] `account.php` - `<div class="admin-account-status">` → `<dl>`; `__row` divs kept; `__label` spans → `<dt>`; `admin-danger-zone__description` div → `<p>`
+- [x] `index.php` - maintenance bar `<div>` → `<aside role="status" aria-label="Statut du site">`
+- [x] `add.php` / `edit.php` - `autocomplete="name"` on author field, `autocomplete="email"` on contact field
+- [x] `tags.php` - all inline `style=` attributes removed; sizing/spacing moved to CSS (`.admin-input--inline`, `.admin-select--inline`, `.admin-inline-form + .admin-inline-form`, `.admin-tags-count`)
 - [x] Marked already-done items in todo files: stats `<dl>`, `thanks.php` `<section>`, `scope="col"` on both tables, `tfe.php` inline styles, `role="alert"` on flash messages
 
-- [x] `admin-submit-wrap` → `admin-form-footer` rename: updated all 6 admin templates (`add.php`, `edit.php`, `login.php`, `account.php`, `import.php`, `pages-edit.php`) and all 8 CSS selectors in `admin.css` (`.admin-form > div:not(…)` exclusion guards, `.admin-login-box` overrides). Closes `todo/01-css-semantic-refactor.md` submit-wrap task.
+- [x] `admin-submit-wrap` → `admin-form-footer` rename: updated all 6 admin templates (`add.php`, `edit.php`, `login.php`, `account.php`, `import.php`, `pages-edit.php`) and all 8 CSS selectors in `admin.css` (`.admin-form > div:not(...)` exclusion guards, `.admin-login-box` overrides). Closes `todo/01-css-semantic-refactor.md` submit-wrap task.
 - [x] Marked `status-badge.php` partial and WCAG 1.3.1 status-badge items as already-done in `todo/02-php-components.md` and `todo/04-accessibility.md` (partial + CSS were fully implemented; TODO had not been updated)
 
-- [x] `public/index.php` — WCAG 2.4.4: home page cards now append `<span class="sr-only">, YEAR</span>` to each card's `<p>` link text so screen readers get unique link names when two theses share the same title
+- [x] `public/index.php` — WCAG 2.4.4: home page cards now append `<span class="sr-only">, YEAR</span>` to each card’s `<p>` link text so screen readers get unique link names when two theses share the same title
 - [x] `todo/04-accessibility.md` — WCAG 2.4.3: marked back-link focus-order item as already done (`tfe-back-link` is already the first DOM element in `.tfe-left`, before `<h1>`)
+
+- [x] `jury-fieldset.php` — WCAG 3.3.2: replaced bare `<label>Lecteur·ices :</label>` with `<fieldset class="admin-jury-lecteurs"><legend>Lecteur·ices</legend>` so the lecteur group has a proper programmatic label
+- [x] `jury-fieldset.php` — WCAG 4.1.2: all "Externe" checkboxes (promoteur + each lecteur row, static + dynamically added via JS) now carry `aria-label="[Role] — externe"` providing group context without visible redundancy
+- [x] `jury-fieldset.php` — WCAG 2.1.1: jury remove buttons verified to have descriptive `aria-label="Supprimer le lecteur·ice N"` on all rows (static + dynamic)
+- [x] `admin.css` — added `.admin-body fieldset fieldset.admin-jury-lecteurs` rule: strips border/background on the nested lecteur fieldset so it renders as a visual sub-group, not a double-bordered card
+- [x] `todo/04-accessibility.md` — WCAG 1.4.4 + 1.4.12 audited and marked done: all font-sizes are `rem`; no `overflow:hidden` on essential text content