search.php: semantic HTML overhaul of répertoire index and results view

- Replace 4x <div class="repertoire-col"> with <section>; remove
  .repertoire-col__header class, CSS now targets section > h2
- Wrap all index link groups in <ul>/<li>; delete the four per-column
  link classes (year-index-item, cat-index-item, student-index-item,
  keyword-index-item); active state switches from .active to
  aria-current="page" on the <a>
- Add <h1 class="sr-only">Répertoire</h1> so the index view has a
  page-level heading (WCAG 2.4.6)
- Remove redundant <div class="search-results-view"> wrapper; padding
  moved to .results-grid and .search-results-header directly
- Replace <div class="results-grid"> with <ul class="results-grid">;
  each result card becomes <li><a class="result-card">
- Replace <span class="result-card__meta"> with <small> (ancillary
  metadata per HTML spec)
- Replace result-count <p> with <output role="status"> (computed value)
- Replace 3x <div class="search-filter-group"><label>…</label><select>
  with <label> directly wrapping <select> (implicit association,
  removes .search-filter-group divs); CSS updated to display:flex on
  the label itself
- Pagination wrapper changed to <nav aria-label="Pagination">;
  page-info span gets aria-current="page"
- search.css: delete .search-results-view, four index-item classes,
  .cat-index-group, .search-filter-group; consolidate years/other
  column link styles under .repertoire-col:first-child ul a and
  .repertoire-col:not(:first-child) ul a selectors; add ul reset rule

public/search.php

@@ -129,8 +129,7 @@ $extraCss = ['assets/search.css'];
     <form class="search-controls" method="GET" action="search.php">
         <input type="hidden" name="query" value="<?= htmlspecialchars($_GET['query'] ?? '') ?>">
 
-        <div class="search-filter-group">
-            <label class="search-filter-label" for="filter-year">Année</label>
+        <label class="search-filter-label" for="filter-year">Année
             <select class="search-filter-select" name="year" id="filter-year">
                 <option value="">Toutes</option>
                 <?php foreach ($years as $y): ?>
@@ -139,10 +138,9 @@ $extraCss = ['assets/search.css'];
                     </option>
                 <?php endforeach; ?>
             </select>
-        </div>
+        </label>
 
-        <div class="search-filter-group">
-            <label class="search-filter-label" for="filter-orientation">Orientation</label>
+        <label class="search-filter-label" for="filter-orientation">Orientation
             <select class="search-filter-select" name="orientation" id="filter-orientation">
                 <option value="">Toutes</option>
                 <?php foreach ($orientations as $o): ?>
@@ -152,10 +150,9 @@ $extraCss = ['assets/search.css'];
                     </option>
                 <?php endforeach; ?>
             </select>
-        </div>
+        </label>
 
-        <div class="search-filter-group">
-            <label class="search-filter-label" for="filter-ap">AP</label>
+        <label class="search-filter-label" for="filter-ap">AP
             <select class="search-filter-select" name="ap_program" id="filter-ap">
                 <option value="">Tous</option>
                 <?php foreach ($apPrograms as $ap): ?>
@@ -165,91 +162,96 @@ $extraCss = ['assets/search.css'];
                     </option>
                 <?php endforeach; ?>
             </select>
-        </div>
+        </label>
 
         <button type="submit" class="search-apply-btn">Filtrer</button>
         <a href="search.php" class="search-reset-link">Réinitialiser</a>
     </form>
 
     <main class="search-main" id="main-content">
-        <div class="search-results-view">
-            <p class="search-results-header"><?= $totalItems ?> résultat<?= $totalItems > 1 ? 's' : '' ?></p>
+        <output class="search-results-header" role="status"><?= $totalItems ?> résultat<?= $totalItems > 1 ? 's' : '' ?></output>
 
             <?php if (!empty($results)): ?>
-            <div class="results-grid">
+            <ul class="results-grid">
                 <?php foreach ($results as $item): ?>
-                <a href="tfe.php?id=<?= (int)$item['id'] ?>" class="result-card">
+                <li><a href="tfe.php?id=<?= (int)$item['id'] ?>" class="result-card">
                     <span class="result-card__authors"><?= htmlspecialchars($item['authors'] ?? '') ?></span>
                     <span class="result-card__title"><?= htmlspecialchars($item['title']) ?></span>
-                    <span class="result-card__meta"><?= htmlspecialchars($item['year']) ?><?php if (!empty($item['orientation'])): ?> · <?= htmlspecialchars($item['orientation']) ?><?php endif; ?></span>
-                </a>
+                    <small class="result-card__meta"><?= htmlspecialchars($item['year']) ?><?php if (!empty($item['orientation'])): ?> · <?= htmlspecialchars($item['orientation']) ?><?php endif; ?></small>
+                </a></li>
                 <?php endforeach; ?>
-            </div>
+            </ul>
 
             <?php if ($totalPages > 1): ?>
-            <div class="pagination-wrap">
+            <nav class="pagination-wrap" aria-label="Pagination">
                 <a href="?<?= http_build_query(array_merge($_GET, ['page' => max(1, $page - 1)])) ?>"
                    class="pagination-btn<?= $page <= 1 ? ' disabled' : '' ?>"
                    <?= $page <= 1 ? 'aria-disabled="true" tabindex="-1"' : '' ?>
                    aria-label="Page précédente">‹</a>
-                <span class="pagination-info"><?= $page ?> / <?= $totalPages ?></span>
+                <span class="pagination-info" aria-current="page"><?= $page ?> / <?= $totalPages ?></span>
                 <a href="?<?= http_build_query(array_merge($_GET, ['page' => min($totalPages, $page + 1)])) ?>"
                    class="pagination-btn<?= $page >= $totalPages ? ' disabled' : '' ?>"
                    <?= $page >= $totalPages ? 'aria-disabled="true" tabindex="-1"' : '' ?>
                    aria-label="Page suivante">›</a>
-            </div>
+            </nav>
             <?php endif; ?>
 
             <?php else: ?>
             <p class="search-empty">Aucun résultat pour cette recherche.</p>
             <?php endif; ?>
-        </div>
     </main>
 
     <?php else: ?>
     <!-- ── RÉPERTOIRE INDEX VIEW ─────────────────────────── -->
     <main class="search-main" id="main-content">
+        <h1 class="sr-only">Répertoire</h1>
         <div class="repertoire-index">
 
             <!-- ANNÉES -->
-            <div class="repertoire-col">
-                <h2 class="repertoire-col__header">Années</h2>
+            <section class="repertoire-col">
+                <h2>Années</h2>
+                <ul>
                 <?php foreach ($years as $y): ?>
-                    <a href="search.php?year=<?= (int)$y ?>"
-                       class="year-index-item <?= (isset($_GET['year']) && $_GET['year'] == $y) ? 'active' : '' ?>">
+                    <li><a href="search.php?year=<?= (int)$y ?>"
+                       <?= (isset($_GET['year']) && $_GET['year'] == $y) ? 'aria-current="page"' : '' ?>>
                         <?= (int)$y ?>
-                    </a>
+                    </a></li>
                 <?php endforeach; ?>
-            </div>
+                </ul>
+            </section>
 
             <!-- CATÉGORIES -->
-            <div class="repertoire-col">
-                <h2 class="repertoire-col__header">Catégories</h2>
+            <section class="repertoire-col">
+                <h2>Catégories</h2>
 
                 <?php if (!empty($orientations)): ?>
                     <span class="cat-index-label">Orientation</span>
+                    <ul>
                     <?php foreach ($orientations as $o): ?>
-                        <a href="search.php?orientation=<?= urlencode($o['name']) ?>"
-                           class="cat-index-item <?= (isset($_GET['orientation']) && $_GET['orientation'] == $o['name']) ? 'active' : '' ?>">
+                        <li><a href="search.php?orientation=<?= urlencode($o['name']) ?>"
+                           <?= (isset($_GET['orientation']) && $_GET['orientation'] == $o['name']) ? 'aria-current="page"' : '' ?>>
                             <?= htmlspecialchars($o['name']) ?>
-                        </a>
+                        </a></li>
                     <?php endforeach; ?>
+                    </ul>
                 <?php endif; ?>
 
                 <?php if (!empty($apPrograms)): ?>
                     <span class="cat-index-label">Ateliers Pluridisciplinaires</span>
+                    <ul>
                     <?php foreach ($apPrograms as $ap): ?>
-                        <a href="search.php?ap_program=<?= urlencode($ap['name']) ?>"
-                           class="cat-index-item <?= (isset($_GET['ap_program']) && $_GET['ap_program'] == $ap['name']) ? 'active' : '' ?>">
+                        <li><a href="search.php?ap_program=<?= urlencode($ap['name']) ?>"
+                           <?= (isset($_GET['ap_program']) && $_GET['ap_program'] == $ap['name']) ? 'aria-current="page"' : '' ?>>
                             <?= htmlspecialchars($ap['name']) ?>
-                        </a>
+                        </a></li>
                     <?php endforeach; ?>
+                    </ul>
                 <?php endif; ?>
-            </div>
+            </section>
 
             <!-- ÉTUDIANTES -->
-            <div class="repertoire-col">
-                <h2 class="repertoire-col__header">Étudiantes</h2>
+            <section class="repertoire-col">
+                <h2>Étudiantes</h2>
                 <?php
                 // Build unique author → thesis list
                 $authorMap = [];
@@ -264,23 +266,28 @@ $extraCss = ['assets/search.css'];
                     }
                 }
                 ksort($authorMap);
-                foreach ($authorMap as $name => $id): ?>
-                    <a href="tfe.php?id=<?= (int)$id ?>" class="student-index-item">
+                ?>
+                <ul>
+                <?php foreach ($authorMap as $name => $id): ?>
+                    <li><a href="tfe.php?id=<?= (int)$id ?>">
                         <?= htmlspecialchars($name) ?>
-                    </a>
+                    </a></li>
                 <?php endforeach; ?>
-            </div>
+                </ul>
+            </section>
 
             <!-- MOTS-CLÉS -->
-            <div class="repertoire-col">
-                <h2 class="repertoire-col__header">Mots-clés</h2>
+            <section class="repertoire-col">
+                <h2>Mots-clés</h2>
+                <ul>
                 <?php foreach ($keywords as $kw): ?>
-                    <a href="search.php?keyword=<?= urlencode($kw['name']) ?>"
-                       class="keyword-index-item <?= (isset($_GET['keyword']) && $_GET['keyword'] == $kw['name']) ? 'active' : '' ?>">
+                    <li><a href="search.php?keyword=<?= urlencode($kw['name']) ?>"
+                       <?= (isset($_GET['keyword']) && $_GET['keyword'] == $kw['name']) ? 'aria-current="page"' : '' ?>>
                         <?= htmlspecialchars($kw['name']) ?>
-                    </a>
+                    </a></li>
                 <?php endforeach; ?>
-            </div>
+                </ul>
+            </section>
 
         </div>
     </main>