fix(a11y): status badges no longer colour-only; fix aria on ✕ buttons (WCAG 1.4.1, 2.5.3)

admin/index.php — status badges (WCAG 1.4.1 Use of Colour):
  - Published badge: prefix ● symbol (aria-hidden) + aria-label="Statut : Publié"
  - Pending badge:   prefix ◌ symbol (aria-hidden) + aria-label="Statut : En attente"
  - Access badges (Libre/Interne/Interdit): prefix ○/◑/● symbol per type (aria-hidden)
    + aria-label="Accès : [type]"; symbol chosen from a PHP map keyed on the slug
  Each badge now communicates its state through shape AND colour, not colour alone.

admin/index.php — ✕ Réinitialiser link (WCAG 2.5.3 / 1.1.1):
  - ✕ wrapped in <span aria-hidden="true"> so the decorative symbol is skipped by
    screen readers; accessible name remains "Réinitialiser"

admin/add.php + admin/edit.php — jury remove buttons (WCAG 2.5.3):
  - All four ✕ remove buttons (2 static template rows + 2 JS-generated innerHTML strings)
    given aria-label="Supprimer ce lecteur"; the bare ✕ Unicode character has no
    speech equivalent so the aria-label replaces rather than supplements the label

TODO.md

@@ -939,7 +939,7 @@ Current state: **zero ARIA attributes, zero skip links, zero focus-visible style
       `search-bar.php` is purely decorative (the `<input>` carries all meaning). Add
       `aria-hidden="true"` and `focusable="false"` to the SVG.
 
-- [ ] **Admin `<nav>` logo is a text link - fine. But "✕ Réinitialiser" and "✕" remove buttons**
+- [x] **Admin `<nav>` logo is a text link - fine. But "✕ Réinitialiser" and "✕" remove buttons**
       use a bare Unicode `✕` as their visible label with no accessible name alternative.
       For the "✕" jury-remove buttons in `add.php`/`edit.php`, add `aria-label="Supprimer ce membre du jury"`.
       For "✕ Réinitialiser" in `index.php`, the text is adequate; the `✕` symbol is decorative
@@ -963,7 +963,7 @@ Current state: **zero ARIA attributes, zero skip links, zero focus-visible style
       because they label a group of checkboxes. These should use `<fieldset>/<legend>` instead
       so the group label is programmatically associated with all its checkboxes.
 
-- [ ] **Status badges in `admin/index.php` convey state by colour alone** - "Publié" (green) /
+- [x] **Status badges in `admin/index.php` convey state by colour alone** - "Publié" (green) /
       "En attente" (yellow) / "Libre" (green) / "Interne" (blue) / "Interdit" (red) all rely
       entirely on colour to distinguish states. This fails **1.4.1 Use of Colour**. Add a
       visible non-colour distinction (e.g. a prefix icon character with `aria-hidden="true"`)
@@ -981,7 +981,7 @@ Current state: **zero ARIA attributes, zero skip links, zero focus-visible style
 
 #### 1.4.1 Use of colour (see also 1.3.1 above)
 
-- [ ] **Admin status badges distinguish states by colour only** - covered above.
+- [x] **Admin status badges distinguish states by colour only** - covered above.
 
 - [ ] **Active nav link has no non-colour indicator** - `.site-nav__link--active` is applied in
       PHP but has no CSS rule at all (flagged in the semantic/CSS audit). Even if a rule existed,
@@ -1165,11 +1165,11 @@ Current state: **zero ARIA attributes, zero skip links, zero focus-visible style
 
 #### 2.5.3 Label in name
 
-- [ ] **`<a class="clear-filter">✕ Réinitialiser</a>`** - the visible label starts with a
+- [x] **`<a class="clear-filter">✕ Réinitialiser</a>`** - the visible label starts with a
       symbol. Fine as long as "Réinitialiser" is in the accessible name, which it is (it's text
       content). No failure here, but the `✕` should be `aria-hidden="true"`.
 
-- [ ] **Admin jury remove buttons `✕`** - the visible label is `✕` only. The accessible name
+- [x] **Admin jury remove buttons `✕`** - the visible label is `✕` only. The accessible name
       must contain (or start with) the visible label text. Since `✕` has no speech equivalent,
       `aria-label="Supprimer ce lecteur"` replaces it entirely, which satisfies 2.5.3.
 

public/admin/add.php

@@ -115,7 +115,7 @@ function wasSelected($key, $value) {
                         <label class="admin-checkbox-label admin-jury-ext">
                             <input type="checkbox" name="jury_lecteurs_ext[0]" value="1"> Externe
                         </label>
-                        <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)">✕</button>
+                        <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)" aria-label="Supprimer ce lecteur">✕</button>
                     </div>
                 </div>
                 <button type="button" class="admin-btn-secondary" style="margin-top:.5rem;"
@@ -132,7 +132,7 @@ function wasSelected($key, $value) {
                           + '<label class="admin-checkbox-label admin-jury-ext">'
                           + '<input type="checkbox" name="jury_lecteurs_ext[' + juryIdx + ']" value="1"> Externe'
                           + '</label>'
-                          + '<button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)">✕</button>';
+                          + '<button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)" aria-label="Supprimer ce lecteur">✕</button>';
             list.appendChild(div);
             juryIdx++;
         }

public/admin/edit.php

@@ -179,7 +179,7 @@ try {
                             <label class="admin-checkbox-label admin-jury-ext">
                                 <input type="checkbox" name="jury_lecteurs_ext[0]" value="1"> Externe
                             </label>
-                            <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)">✕</button>
+                            <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)" aria-label="Supprimer ce lecteur">✕</button>
                         </div>
                         <?php else: ?>
                             <?php foreach ($juryLecteurs as $li => $lm): ?>
@@ -190,7 +190,7 @@ try {
                                     <input type="checkbox" name="jury_lecteurs_ext[<?= $li ?>]" value="1"
                                            <?= $lm['is_external'] ? 'checked' : '' ?>> Externe
                                 </label>
-                                <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)">✕</button>
+                                <button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)" aria-label="Supprimer ce lecteur">✕</button>
                             </div>
                             <?php endforeach; ?>
                         <?php endif; ?>
@@ -210,7 +210,7 @@ try {
                           + '<label class="admin-checkbox-label admin-jury-ext">'
                           + '<input type="checkbox" name="jury_lecteurs_ext[' + juryIdx + ']" value="1"> Externe'
                           + '</label>'
-                          + '<button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)">✕</button>';
+                          + '<button type="button" class="admin-btn-remove" onclick="removeJuryRow(this)" aria-label="Supprimer ce lecteur">✕</button>';
             list.appendChild(div);
             juryIdx++;
         }

public/admin/index.php

@@ -132,7 +132,7 @@ document.addEventListener('DOMContentLoaded', () => {
         </select>
         <button type="submit" class="admin-filters-btn">Filtrer</button>
         <?php if ($searchQuery || $yearFilter || $orientationFilter): ?>
-            <a href="/admin/" class="admin-filters-reset">Réinitialiser</a>
+            <a href="/admin/" class="admin-filters-reset"><span aria-hidden="true">✕ </span>Réinitialiser</a>
         <?php endif; ?>
     </form>
 
@@ -187,13 +187,18 @@ document.addEventListener('DOMContentLoaded', () => {
                 <td><?= htmlspecialchars($thesis['ap_program'] ?? 'N/A') ?></td>
                 <td>
                     <?php if ($thesis['is_published']): ?>
-                        <span class="status-badge status-published">Publié</span>
+                        <span class="status-badge status-published" aria-label="Statut : Publié"><span aria-hidden="true">● </span>Publié</span>
                     <?php else: ?>
-                        <span class="status-badge status-pending">En attente</span>
+                        <span class="status-badge status-pending" aria-label="Statut : En attente"><span aria-hidden="true">◌ </span>En attente</span>
                     <?php endif; ?>
                     <?php if (!empty($thesis['access_type'])): ?>
-                    <br><span class="status-badge status-access status-access--<?= strtolower(preg_replace('/[^a-z]/i', '', $thesis['access_type'])) ?>">
-                        <?= htmlspecialchars($thesis['access_type']) ?>
+                    <?php
+                        $accessSlug  = strtolower(preg_replace('/[^a-z]/i', '', $thesis['access_type']));
+                        $accessSymbols = ['libre' => '○', 'interne' => '◑', 'interdit' => '●'];
+                        $accessSymbol  = $accessSymbols[$accessSlug] ?? '●';
+                    ?>
+                    <br><span class="status-badge status-access status-access--<?= $accessSlug ?>" aria-label="Accès : <?= htmlspecialchars($thesis['access_type']) ?>">
+                        <span aria-hidden="true"><?= $accessSymbol ?> </span><?= htmlspecialchars($thesis['access_type']) ?>
                     </span>
                     <?php endif; ?>
                 </td>