♻️ 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/dequal/lite/index.js

@@ -1,31 +0,0 @@
-var has = Object.prototype.hasOwnProperty;
-
-function dequal(foo, bar) {
-	var ctor, len;
-	if (foo === bar) return true;
-
-	if (foo && bar && (ctor=foo.constructor) === bar.constructor) {
-		if (ctor === Date) return foo.getTime() === bar.getTime();
-		if (ctor === RegExp) return foo.toString() === bar.toString();
-
-		if (ctor === Array) {
-			if ((len=foo.length) === bar.length) {
-				while (len-- && dequal(foo[len], bar[len]));
-			}
-			return len === -1;
-		}
-
-		if (!ctor || typeof foo === 'object') {
-			len = 0;
-			for (ctor in foo) {
-				if (has.call(foo, ctor) && ++len && !has.call(bar, ctor)) return false;
-				if (!(ctor in bar) || !dequal(foo[ctor], bar[ctor])) return false;
-			}
-			return Object.keys(bar).length === len;
-		}
-	}
-
-	return foo !== foo && bar !== bar;
-}
-
-exports.dequal = dequal;