♻️ 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/vite-plugin-html/transform/slots.js

@@ -1,28 +0,0 @@
-import { visit } from "unist-util-visit";
-import { escapeTemplateLiteralCharacters } from "./utils.js";
-const rehypeSlots = ({ s }) => {
-  return (tree, file) => {
-    visit(tree, (node) => {
-      if (node.type === "element" && node.tagName === "slot") {
-        if (typeof node.properties?.["is:inline"] !== "undefined") return;
-        const name = node.properties?.["name"] ?? "default";
-        const start = node.position?.start.offset ?? 0;
-        const end = node.position?.end.offset ?? 0;
-        const first = node.children.at(0) ?? node;
-        const last = node.children.at(-1) ?? node;
-        const text = file.value.slice(first.position?.start.offset ?? 0, last.position?.end.offset ?? 0).toString();
-        s.overwrite(
-          start,
-          end,
-          `\${${SLOT_PREFIX}["${name}"] ?? \`${escapeTemplateLiteralCharacters(text).trim()}\`}`
-        );
-      }
-    });
-  };
-};
-var slots_default = rehypeSlots;
-const SLOT_PREFIX = `___SLOTS___`;
-export {
-  SLOT_PREFIX,
-  slots_default as default
-};