fix: BUG-053,055,058,060,061,067,069 - JS minification, meta tags, skip-link, docs footer

- BUG-053: Add terser JS minification to build process
- BUG-060: Add og:image, twitter:card, twitter:image to sub-pages
- BUG-067: Update skip-link to #main-content on all pages

scripts/build-html.cjs

@@ -46,3 +46,19 @@ for (const file of files) {
   console.log(`  Built: ${file}`);
 }
 console.log('Done.');
+
+// JS Minification (requires terser)
+const { execSync } = require("child_process");
+const jsFiles = [
+  { src: "public/app.js", out: "public/app.min.js" },
+  { src: "public/status.js", out: "public/status.min.js" },
+];
+console.log("Minifying JS...");
+for (const { src, out } of jsFiles) {
+  const srcPath = path.join(__dirname, "..", src);
+  const outPath = path.join(__dirname, "..", out);
+  if (fs.existsSync(srcPath)) {
+    execSync(`npx terser ${srcPath} -o ${outPath} -c -m`, { stdio: "inherit" });
+    console.log(`  Minified: ${src} → ${out}`);
+  }
+}