backoffice: manage launcher auto-update from the Versions page

Two things change so the operator never has to SSH for a launcher
release.

1. SignManifest::run() now also re-hashes the manifest's `launcher`
   section. It looks for builds/launcher/<basename of launcher.url>;
   falls back to a tolerant glob *<version>*.exe if the exact name
   isn't found. Updates sizeBytes + sha256 in place. The Ed25519 sign
   step at the end already covered this branch — it was just blank
   data before.

2. admin/versions.php has a new "Auto-update du launcher" card above
   the manifest table. Shows the announced version + minRequired, the
   exe presence badge and the hash status, and a small form to set or
   update the launcher entry (version + minRequired only — URL is
   derived from base_url + version automatically). A "Retirer la
   section" button disables the auto-update by deleting the launcher
   key from versions.json. Lists the .exe files present in
   builds/launcher/ for visibility.

Workflow now: edit the version in the form → SFTP-upload
PSLauncher-X.Y.Z.exe to builds/launcher/ → click "🔁 Sync" once →
manifest is hashed and signed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/admin/versions.php

@@ -132,6 +132,34 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             saveManifest($manifestPath, $manifest);
             $message = "v{$version} retirée du manifest. Le ZIP reste dans builds/ (à supprimer en SFTP si voulu).";
         }
+        elseif ($action === 'set_launcher') {
+            $lver  = trim($_POST['launcher_version'] ?? '');
+            $lmin  = trim($_POST['launcher_min_required'] ?? '');
+            if (!preg_match('/^\d+\.\d+\.\d+$/', $lver)) {
+                throw new Exception('Numéro de version launcher invalide (X.Y.Z attendu).');
+            }
+            if ($lmin !== '' && !preg_match('/^\d+\.\d+\.\d+$/', $lmin)) {
+                throw new Exception('Numéro de version "minRequired" invalide.');
+            }
+            $base = $config['base_url'] ?? 'https://asterionvr.com/PS_Launcher';
+            $manifest['launcher'] = [
+                'version'         => $lver,
+                'minRequired'     => $lmin !== '' ? $lmin : '0.5.0',
+                'download'        => [
+                    'url'       => "{$base}/builds/launcher/PSLauncher-{$lver}.exe",
+                    'sizeBytes' => 0,
+                    'sha256'    => 'REPLACE_AFTER_BUILD',
+                ],
+                'releaseNotesUrl' => null,
+            ];
+            saveManifest($manifestPath, $manifest);
+            $message = "Section launcher mise à jour (v{$lver}). Upload PSLauncher-{$lver}.exe dans builds/launcher/ puis clique « Sync ».";
+        }
+        elseif ($action === 'remove_launcher') {
+            unset($manifest['launcher']);
+            saveManifest($manifestPath, $manifest);
+            $message = "Section launcher retirée du manifest (auto-update désactivé).";
+        }
         elseif ($action === 'sync') {
             // Appel direct à la classe — pas d'exec(), fonctionne même quand la fonction
             // est désactivée par le mutualisé OVH.
@@ -205,6 +233,81 @@ Layout::header('Versions', 'versions');
     </form>
 </div>
 
+<!-- Card LAUNCHER (auto-update du PSLauncher.exe lui-même) -->
+<div class="card">
+    <h2>Auto-update du launcher</h2>
+    <?php
+    $launcher = $manifest['launcher'] ?? null;
+    $launcherFiles = is_dir("$buildsDir/launcher") ? array_map('basename', glob("$buildsDir/launcher/*.exe") ?: []) : [];
+    $launcherZipPresent = false;
+    $launcherHashed = false;
+    if ($launcher) {
+        $expectedFile = basename(parse_url($launcher['download']['url'] ?? '', PHP_URL_PATH) ?? '');
+        $launcherZipPresent = in_array($expectedFile, $launcherFiles, true);
+        $launcherHashed = !empty($launcher['download']['sha256']) && !str_starts_with($launcher['download']['sha256'], 'REPLACE');
+    }
+    ?>
+    <?php if ($launcher): ?>
+        <p>
+            Version annoncée : <strong>v<?= htmlspecialchars($launcher['version']) ?></strong>
+            • minRequired : <code><?= htmlspecialchars($launcher['minRequired'] ?? '—') ?></code>
+            • Exe : <?= $launcherZipPresent
+                ? "<span class='badge badge-success'>présent</span>"
+                : "<span class='badge badge-warning'>absent</span>" ?>
+            • Hash : <?= $launcherHashed
+                ? "<span class='badge badge-success'>OK</span>"
+                : "<span class='badge badge-warning'>à calculer</span>" ?>
+        </p>
+        <p class="muted">URL attendue de l'exe : <code><?= htmlspecialchars($launcher['download']['url']) ?></code></p>
+    <?php else: ?>
+        <p class="muted">Section launcher absente du manifest — l'auto-update est désactivé. Configure-la ci-dessous pour l'activer.</p>
+    <?php endif; ?>
+
+    <h3 style="margin-top: 18px; font-size: 13px; color: var(--text-secondary); text-transform: uppercase;">Définir / mettre à jour</h3>
+    <form method="post">
+        <?= Layout::csrfField() ?>
+        <input type="hidden" name="action" value="set_launcher">
+        <div class="row">
+            <div class="col field">
+                <label>Version launcher (X.Y.Z)</label>
+                <input type="text" name="launcher_version" placeholder="0.6.0"
+                       value="<?= htmlspecialchars($launcher['version'] ?? '') ?>" required pattern="\d+\.\d+\.\d+">
+            </div>
+            <div class="col field">
+                <label>Version minimale requise (X.Y.Z)</label>
+                <input type="text" name="launcher_min_required" placeholder="0.5.0"
+                       value="<?= htmlspecialchars($launcher['minRequired'] ?? '0.5.0') ?>" pattern="\d+\.\d+\.\d+">
+            </div>
+        </div>
+        <div class="toolbar">
+            <button class="btn btn-success" type="submit">Définir</button>
+            <?php if ($launcher): ?>
+            <form method="post" style="display:inline" onsubmit="return confirm('Retirer la section launcher du manifest ? L\'auto-update sera désactivé.')">
+                <?= Layout::csrfField() ?>
+                <input type="hidden" name="action" value="remove_launcher">
+                <button class="btn btn-danger" type="submit">Retirer la section</button>
+            </form>
+            <?php endif; ?>
+        </div>
+    </form>
+
+    <h3 style="margin-top: 18px; font-size: 13px; color: var(--text-secondary); text-transform: uppercase;">Workflow</h3>
+    <ol class="muted">
+        <li>Définis la version ci-dessus (ex : <code>0.6.0</code>).</li>
+        <li>Upload <code>PSLauncher-X.Y.Z.exe</code> via SFTP dans <code>www/PS_Launcher/builds/launcher/</code>.</li>
+        <li>Clique le bouton <strong>🔁 Sync (sign-manifest)</strong> du tableau du dessous — il hashera le launcher en plus des versions Proserve.</li>
+    </ol>
+
+    <?php if (!empty($launcherFiles)): ?>
+    <h3 style="margin-top: 18px; font-size: 13px; color: var(--text-secondary); text-transform: uppercase;">Exes présents dans builds/launcher/</h3>
+    <ul class="muted">
+        <?php foreach ($launcherFiles as $f): ?>
+            <li><code><?= htmlspecialchars($f) ?></code> — <?= Layout::formatBytes(filesize("$buildsDir/launcher/$f")) ?></li>
+        <?php endforeach; ?>
+    </ul>
+    <?php endif; ?>
+</div>
+
 <div class="card">
     <div class="toolbar">
         <h2 style="margin: 0; flex: 1;">Manifest actuel</h2>