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/

scripts/build.mjs

@@ -0,0 +1,48 @@
+#!/usr/bin/env node
+/**
+ * Build all frontend assets: CSS + JS.
+ *
+ * Usage:
+ *   node scripts/build.mjs          # build everything
+ *   node scripts/build.mjs --css    # CSS only
+ *   node scripts/build.mjs --js     # JS only
+ *
+ * Requires: npm install (lightningcss-cli, rolldown)
+ */
+
+import { execSync } from "node:child_process";
+import { existsSync } from "node:fs";
+import { resolve, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const root = resolve(__dirname, "..");
+
+const args = process.argv.slice(2);
+const onlyCss = args.includes("--css");
+const onlyJs = args.includes("--js");
+const buildAll = !onlyCss && !onlyJs;
+
+function run(label, cmd) {
+  console.log(`\n📦 ${label}…`);
+  execSync(cmd, {
+    cwd: root,
+    stdio: "inherit",
+  });
+}
+
+// Ensure node_modules exist
+if (!existsSync(resolve(root, "node_modules"))) {
+  console.log("📥 Installing dependencies (npm ci)…");
+  execSync("npm ci", { cwd: root, stdio: "inherit" });
+}
+
+if (buildAll || onlyCss) {
+  run("Building CSS bundles", "node scripts/build-css.mjs");
+}
+
+if (buildAll || onlyJs) {
+  run("Building JS bundles", "node scripts/build-js.mjs");
+}
+
+console.log("\n✅ Build complete\n");