♻️ 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
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✅ 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/visible.js

@@ -1,25 +0,0 @@
-const visibleDirective = (load, options, el) => {
-  const cb = async () => {
-    const hydrate = await load();
-    await hydrate();
-  };
-  const rawOptions = typeof options.value === "object" ? options.value : void 0;
-  const ioOptions = {
-    rootMargin: rawOptions?.rootMargin
-  };
-  const io = new IntersectionObserver((entries) => {
-    for (const entry of entries) {
-      if (!entry.isIntersecting) continue;
-      io.disconnect();
-      cb();
-      break;
-    }
-  }, ioOptions);
-  for (const child of el.children) {
-    io.observe(child);
-  }
-};
-var visible_default = visibleDirective;
-export {
-  visible_default as default
-};