feat: licence page, admin pages editor, license types, gradient card placeholders, latest-year home view

- Feature 1: public /licence.php fetches 'licenses' page from DB, renders Markdown
- Feature 1: nav.php adds 'Licence' link with active state
- Feature 2: Database::getPage(), savePage(), getAllPages() methods
- Feature 2: bundled src/Parsedown.php (MIT, zero-dependency)
- Feature 2: apropos.php now renders 'about' page content from DB via Parsedown
- Feature 2: admin/pages.php (list) + admin/pages-edit.php (EasyMDE editor)
- Feature 2: admin/actions/page.php (auth+CSRF+validation+save)
- Feature 2: admin/head.php adds 'Pages statiques' nav link
- Feature 3: storage/schema.sql seeds 8 CC license types
- Feature 3: storage/migrations/003_seed_license_types.sql (applied to live DB)
- Feature 3: Database::getLicenseTypes() / getAllLicenseTypes()
- Feature 3: admin/add.php + formulaire.php: license_id field on add form
- Feature 3: admin/edit.php: license_id field on edit form with raw FK lookup
- Feature 3: tfe.php: shows 'Licence :' meta row when non-null
- Feature 6: main.css: .card__media--gradient styles
- Feature 6: index.php: deterministic HSL gradient placeholder cards
- Feature 6: Database::getLatestYearTheses() + getLatestPublishedYear()
- Feature 6: index.php default home = random latest-year theses with info label

public/admin/actions/formulaire.php

@@ -105,6 +105,9 @@ try {
     // Formats (optional, multiple selection)
     $formatIds = isset($_POST["formats"]) ? array_map('intval', $_POST["formats"]) : [];
 
+    // License
+    $licenseId = filter_var($_POST['license_id'] ?? '', FILTER_VALIDATE_INT) ?: null;
+
     // External link
     $lien = $_POST["lien"] ?? '';
     if (!empty($lien)) {
@@ -135,9 +138,9 @@ try {
             identifier, title, subtitle, year,
             orientation_id, ap_program_id, finality_id,
             synopsis, file_size_info,
-            baiu_link,
+            baiu_link, license_id,
             submitted_at
-        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP)
+        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP)
     ");
 
     $stmt->execute([
@@ -150,7 +153,8 @@ try {
         $finalityId,
         $synopsis,
         !empty($durationInfo) ? $durationInfo : null,
-        !empty($lien) ? $lien : null
+        !empty($lien) ? $lien : null,
+        $licenseId
     ]);
 
     $thesisId = $pdo->lastInsertId();

public/admin/actions/page.php

@@ -0,0 +1,35 @@
+<?php
+require_once __DIR__ . "/../../config/bootstrap.php";
+require_once __DIR__ . '/../../src/AdminAuth.php';
+AdminAuth::requireLogin();
+
+// CSRF check
+if (!isset($_POST['csrf_token']) || !isset($_SESSION['csrf_token']) ||
+    !hash_equals($_SESSION['csrf_token'], $_POST['csrf_token'])) {
+    die("Erreur de sécurité : token invalide.");
+}
+
+$allowedSlugs = ['about', 'licenses', 'charte', 'contact'];
+$slug = $_POST['slug'] ?? '';
+if (!in_array($slug, $allowedSlugs)) {
+    die("Slug invalide.");
+}
+
+$content = $_POST['content'] ?? '';
+if (strlen($content) > 65535) {
+    die("Contenu trop long (max 65 535 caractères).");
+}
+
+require_once __DIR__ . '/../../src/Database.php';
+
+try {
+    $db = new Database();
+    $db->savePage($slug, $content);
+    $_SESSION['success'] = "Page «" . $slug . "» mise à jour avec succès.";
+} catch (Exception $e) {
+    error_log("Page save error: " . $e->getMessage());
+    die("Erreur lors de la sauvegarde : " . htmlspecialchars($e->getMessage()));
+}
+
+header('Location: /admin/pages.php');
+exit;

public/admin/add.php

@@ -18,6 +18,7 @@ try {
     $finalityTypes = $db->getAllFinalityTypes();
     $languages    = $db->getAllLanguages();
     $formatTypes  = $db->getAllFormatTypes();
+    $licenseTypes = $db->getAllLicenseTypes();
 } catch (Exception $e) {
     error_log("Failed to load form data: " . $e->getMessage());
     die("Erreur lors du chargement du formulaire.");
@@ -191,6 +192,20 @@ function wasSelected($key, $value) {
                       rows="7" required><?= old('synopsis') ?></textarea>
         </div>
 
+        <!-- Licence -->
+        <div class="admin-form-row">
+            <label class="admin-label" for="license_id">Licence :</label>
+            <select class="admin-select" id="license_id" name="license_id">
+                <option value="">— Inconnue —</option>
+                <?php foreach ($licenseTypes as $lt): ?>
+                    <option value="<?= htmlspecialchars($lt['id']) ?>"
+                        <?= wasSelected('license_id', $lt['id']) ? 'selected' : '' ?>>
+                        <?= htmlspecialchars($lt['name']) ?>
+                    </option>
+                <?php endforeach; ?>
+            </select>
+        </div>
+
         <!-- Durée/Taille -->
         <div class="admin-form-row">
             <label class="admin-label" for="duration_info">Durée / Taille :</label>

public/admin/edit.php

@@ -36,6 +36,8 @@ try {
             $db->beginTransaction();
 
             // Update thesis basic info
+            $editLicenseId = filter_var($_POST['license_id'] ?? '', FILTER_VALIDATE_INT) ?: null;
+
             $stmt = $pdo->prepare("
                 UPDATE theses SET
                     title = ?,
@@ -47,6 +49,7 @@ try {
                     synopsis = ?,
                     file_size_info = ?,
                     baiu_link = ?,
+                    license_id = ?,
                     is_published = ?,
                     updated_at = CURRENT_TIMESTAMP
                 WHERE id = ?
@@ -62,6 +65,7 @@ try {
                 trim($_POST['synopsis']),
                 !empty($_POST['duration_info']) ? trim($_POST['duration_info']) : null,
                 !empty($_POST['lien']) ? trim($_POST['lien']) : null,
+                $editLicenseId,
                 isset($_POST['is_published']) ? 1 : 0,
                 $thesisId
             ]);
@@ -164,7 +168,13 @@ try {
     $finalityTypes = $db->getAllFinalityTypes();
     $languages = $db->getAllLanguages();
     $formatTypes = $db->getAllFormatTypes();
-    
+    $licenseTypes = $db->getAllLicenseTypes();
+
+    // Fetch raw license_id FK (view only exposes license_type name string)
+    $licenseStmt = $pdo->prepare("SELECT license_id FROM theses WHERE id = ?");
+    $licenseStmt->execute([$thesisId]);
+    $currentLicenseId = $licenseStmt->fetchColumn();
+
     // Set page title for header
     $pageTitle = "Éditer TFE - " . htmlspecialchars($thesis['title']);
 
@@ -247,6 +257,19 @@ try {
                    value="<?= htmlspecialchars($thesis['supervisors'] ?? '') ?>">
         </div>
 
+        <div class="admin-form-row">
+            <label class="admin-label" for="license_id">Licence :</label>
+            <select class="admin-select" id="license_id" name="license_id">
+                <option value="">— Inconnue —</option>
+                <?php foreach ($licenseTypes as $lt): ?>
+                    <option value="<?= $lt['id'] ?>"
+                        <?= ($currentLicenseId == $lt['id']) ? 'selected' : '' ?>>
+                        <?= htmlspecialchars($lt['name']) ?>
+                    </option>
+                <?php endforeach; ?>
+            </select>
+        </div>
+
         <div class="admin-form-row">
             <label class="admin-label" for="titre">Titre :</label>
             <input class="admin-input" type="text" id="titre" name="titre"

public/admin/pages-edit.php

@@ -0,0 +1,67 @@
+<?php
+require_once __DIR__ . "/../../config/bootstrap.php";
+require_once __DIR__ . '/../../src/AdminAuth.php';
+AdminAuth::requireLogin();
+
+if (empty($_SESSION['csrf_token'])) {
+    $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
+}
+
+require_once __DIR__ . '/../../src/Database.php';
+
+$allowedSlugs = ['about', 'licenses', 'charte', 'contact'];
+$slug = $_GET['slug'] ?? '';
+
+if (!in_array($slug, $allowedSlugs)) {
+    header('Location: /admin/pages.php');
+    exit;
+}
+
+try {
+    $db = new Database();
+    $page = $db->getPage($slug);
+    if (!$page) {
+        die("Page introuvable.");
+    }
+} catch (Exception $e) {
+    die("Erreur: " . htmlspecialchars($e->getMessage()));
+}
+
+$pageTitle = "Éditer : " . htmlspecialchars($page['title']);
+?>
+<?php require_once APP_ROOT . '/templates/admin/head.php'; ?>
+
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.css">
+
+<main class="admin-main">
+    <h1 class="admin-page-title">Éditer : <?= htmlspecialchars($page['title']) ?></h1>
+
+    <form action="/admin/actions/page.php" method="post" class="admin-form">
+        <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
+        <input type="hidden" name="slug" value="<?= htmlspecialchars($slug) ?>">
+
+        <div class="admin-form-row" style="align-items:start;">
+            <label class="admin-label" for="content">Contenu (Markdown) :</label>
+            <textarea class="admin-textarea" id="content" name="content"
+                      rows="20"><?= htmlspecialchars($page['content'] ?? '') ?></textarea>
+        </div>
+
+        <div class="admin-submit-wrap">
+            <button type="submit" class="admin-btn">Enregistrer</button>
+            <a href="/admin/pages.php" class="admin-btn-secondary" style="margin-left:.75rem;">Annuler</a>
+        </div>
+    </form>
+</main>
+
+<script src="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.js"></script>
+<script>
+    var easyMDE = new EasyMDE({
+        element: document.getElementById('content'),
+        spellChecker: false,
+        status: ['lines', 'words'],
+        minHeight: '400px',
+        toolbarTips: true
+    });
+</script>
+
+<?php require_once APP_ROOT . '/templates/admin/footer.php'; ?>

public/admin/pages.php

@@ -0,0 +1,55 @@
+<?php
+require_once __DIR__ . "/../../config/bootstrap.php";
+require_once __DIR__ . '/../../src/AdminAuth.php';
+AdminAuth::requireLogin();
+
+require_once __DIR__ . '/../../src/Database.php';
+
+$pageTitle = "Pages statiques";
+
+try {
+    $db = new Database();
+    $pages = $db->getAllPages();
+} catch (Exception $e) {
+    error_log("Error loading pages: " . $e->getMessage());
+    die("Erreur lors du chargement des pages.");
+}
+
+$success = $_SESSION['success'] ?? null;
+unset($_SESSION['success']);
+?>
+<?php require_once APP_ROOT . '/templates/admin/head.php'; ?>
+
+<main class="admin-main">
+    <h1 class="admin-page-title">Pages statiques</h1>
+
+    <?php if ($success): ?>
+    <div class="admin-alert admin-alert--success">✓ <?= htmlspecialchars($success) ?></div>
+    <?php endif; ?>
+
+    <table class="admin-table">
+        <thead>
+            <tr>
+                <th>Slug</th>
+                <th>Titre</th>
+                <th>Mis à jour</th>
+                <th>Action</th>
+            </tr>
+        </thead>
+        <tbody>
+            <?php foreach ($pages as $p): ?>
+            <tr>
+                <td><code><?= htmlspecialchars($p['slug']) ?></code></td>
+                <td><?= htmlspecialchars($p['title']) ?></td>
+                <td><?= htmlspecialchars($p['updated_at'] ?? '—') ?></td>
+                <td>
+                    <a href="/admin/pages-edit.php?slug=<?= urlencode($p['slug']) ?>"
+                       class="admin-btn" style="font-size:.8rem;padding:.3rem .75rem;">Éditer</a>
+                </td>
+            </tr>
+            <?php endforeach; ?>
+        </tbody>
+    </table>
+</main>
+
+<?php require_once APP_ROOT . '/templates/admin/footer.php'; ?>