♻️ 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/vite-plugin-astro-server/util.js

@@ -1,8 +0,0 @@
-import { isCSSRequest } from "vite";
-const rawRE = /(?:\?|&)raw(?:&|$)/;
-const inlineRE = /(?:\?|&)inline\b/;
-const isBuildableCSSRequest = (request) => isCSSRequest(request) && !rawRE.test(request) && !inlineRE.test(request);
-export {
-  isBuildableCSSRequest,
-  isCSSRequest
-};