feat: Upgrade to Astro with full PDPA compliance

PDPA Features:
✅ Cookie consent banner
✅ Consent logging API
✅ Admin dashboard
✅ Privacy Policy
✅ Terms & Conditions

Technical:
✅ Astro 5.x + Tailwind v4
✅ Docker on port 80
✅ SQLite database
✅ 15 pages built

Ready for Easypanel deployment.

node_modules/astro/dist/assets/utils/url.js

@@ -0,0 +1,11 @@
+const PLACEHOLDER_BASE = "astro://placeholder";
+function createPlaceholderURL(pathOrUrl) {
+  return new URL(pathOrUrl, PLACEHOLDER_BASE);
+}
+function stringifyPlaceholderURL(url) {
+  return url.href.replace(PLACEHOLDER_BASE, "");
+}
+export {
+  createPlaceholderURL,
+  stringifyPlaceholderURL
+};