♻️ Restructure: Move Astro to repository root

BREAKING CHANGE: Astro project is now at repository root
- Removed dealplustech-astro subdirectory
- Moved all Astro files to root
- Updated PostCSS config to .cjs
- Removed old Next.js files

✅ 11 pages built successfully
✅ Cookie consent banner included
✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/astro/dist/runtime/client/media.js

@@ -1,18 +0,0 @@
-const mediaDirective = (load, options) => {
-  const cb = async () => {
-    const hydrate = await load();
-    await hydrate();
-  };
-  if (options.value) {
-    const mql = matchMedia(options.value);
-    if (mql.matches) {
-      cb();
-    } else {
-      mql.addEventListener("change", cb, { once: true });
-    }
-  }
-};
-var media_default = mediaDirective;
-export {
-  media_default as default
-};