♻️ 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/assets/build/remote.d.ts

@@ -1,30 +0,0 @@
-export type RemoteCacheEntry = {
-    data?: string;
-    expires: number;
-    etag?: string;
-    lastModified?: string;
-};
-export declare function loadRemoteImage(src: string): Promise<{
-    data: Buffer<ArrayBuffer>;
-    expires: number;
-    etag: string | undefined;
-    lastModified: string | undefined;
-}>;
-/**
- * Revalidate a cached remote asset using its entity-tag or modified date.
- * Uses the [If-None-Match](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-None-Match) and [If-Modified-Since](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-Modified-Since)
- * headers to check with the remote server if the cached version of a remote asset is still up to date.
- * The remote server may respond that the cached asset is still up-to-date if the entity-tag or modification time matches (304 Not Modified), or respond with an updated asset (200 OK)
- * @param src - url to remote asset
- * @param revalidationData - an object containing the stored Entity-Tag of the cached asset and/or the Last Modified time
- * @returns An ImageData object containing the asset data, a new expiry time, and the asset's etag. The data buffer will be empty if the asset was not modified.
- */
-export declare function revalidateRemoteImage(src: string, revalidationData: {
-    etag?: string;
-    lastModified?: string;
-}): Promise<{
-    data: Buffer<ArrayBuffer>;
-    expires: number;
-    etag: string | undefined;
-    lastModified: string | undefined;
-}>;