♻️ 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/prismjs/components/prism-diff.js

@@ -1,64 +0,0 @@
-(function (Prism) {
-
-	Prism.languages.diff = {
-		'coord': [
-			// Match all kinds of coord lines (prefixed by "+++", "---" or "***").
-			/^(?:\*{3}|-{3}|\+{3}).*$/m,
-			// Match "@@ ... @@" coord lines in unified diff.
-			/^@@.*@@$/m,
-			// Match coord lines in normal diff (starts with a number).
-			/^\d.*$/m
-		]
-
-		// deleted, inserted, unchanged, diff
-	};
-
-	/**
-	 * A map from the name of a block to its line prefix.
-	 *
-	 * @type {Object<string, string>}
-	 */
-	var PREFIXES = {
-		'deleted-sign': '-',
-		'deleted-arrow': '<',
-		'inserted-sign': '+',
-		'inserted-arrow': '>',
-		'unchanged': ' ',
-		'diff': '!',
-	};
-
-	// add a token for each prefix
-	Object.keys(PREFIXES).forEach(function (name) {
-		var prefix = PREFIXES[name];
-
-		var alias = [];
-		if (!/^\w+$/.test(name)) { // "deleted-sign" -> "deleted"
-			alias.push(/\w+/.exec(name)[0]);
-		}
-		if (name === 'diff') {
-			alias.push('bold');
-		}
-
-		Prism.languages.diff[name] = {
-			pattern: RegExp('^(?:[' + prefix + '].*(?:\r\n?|\n|(?![\\s\\S])))+', 'm'),
-			alias: alias,
-			inside: {
-				'line': {
-					pattern: /(.)(?=[\s\S]).*(?:\r\n?|\n)?/,
-					lookbehind: true
-				},
-				'prefix': {
-					pattern: /[\s\S]/,
-					alias: /\w+/.exec(name)[0]
-				}
-			}
-		};
-
-	});
-
-	// make prefixes available to Diff plugin
-	Object.defineProperty(Prism.languages.diff, 'PREFIXES', {
-		value: PREFIXES
-	});
-
-}(Prism));