Add biome + rolldown + lightningcss build pipeline for JS/CSS bundling & minification

- package.json with biome, rolldown, lightningcss devDependencies  
- biome.json: add CSS formatter support
- scripts/build-css.mjs: lightningcss resolves @import chain, bundles/minifies CSS  
- scripts/build-js.mjs: rolldown per-entry JS bundling (no code splitting)
- scripts/build.mjs: orchestrator for both CSS + JS
- scripts/check-build.mjs: staleness checker for CI/deploy guard
- justfile: add build, build-css, build-js, build-install, build-check recipes
- justfile: deploy recipe now runs build before deploy-code
- head.php + form-page.php: use dist/base.min.css instead of style.css
- All controllers + FormBootstrap: reference dist/*.min.{css,js}
- admin footer: load admin.min.js for all admin pages
- repertoire: use public.min.js instead of individual app JS files
- Fix stray '}' syntax error in admin.css line 305
- .gitignore: add app/public/assets/dist/

app/templates/head.php

@@ -7,7 +7,7 @@
     // Admin: append suffix to title and prepend admin.css
     if (!empty($isAdmin)) {
         $pageTitle = isset($pageTitle) ? $pageTitle . ' – Admin' : 'Admin';
-        $extraCss  = array_merge(['/assets/css/admin.css'], $extraCssAdmin ?? [], $extraCss ?? []);
+        $extraCss  = array_merge(['/assets/dist/admin.min.css'], $extraCssAdmin ?? [], $extraCss ?? []);
     }
     ?>
     <title><?= htmlspecialchars($pageTitle ?? 'XAMXAM') ?></title>
@@ -70,7 +70,7 @@
     <?php if (!empty($isAdmin) || !empty($filepondBase)): ?>
     <meta name="filepond-base" content="<?= htmlspecialchars($filepondBase ?? '/admin/actions/filepond') ?>">
     <?php endif; ?>
-    <link rel="stylesheet" href="<?= App::assetV('/assets/css/style.css') ?>">
+    <link rel="stylesheet" href="<?= App::assetV('/assets/dist/base.min.css') ?>">
     <?php foreach ($extraCss ?? [] as $css): ?>
     <link rel="stylesheet" href="<?= App::assetV($css) ?>">
     <?php endforeach; ?>