♻️ 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/plugins/treeview/prism-treeview.js

@@ -1,70 +0,0 @@
-(function () {
-
-	if (typeof Prism === 'undefined') {
-		return;
-	}
-
-	Prism.languages.treeview = {
-		'treeview-part': {
-			pattern: /^.+/m,
-			inside: {
-				'entry-line': [
-					{
-						pattern: /\|-- |├── /,
-						alias: 'line-h'
-					},
-					{
-						pattern: /\| {3}|│ {3}/,
-						alias: 'line-v'
-					},
-					{
-						pattern: /`-- |└── /,
-						alias: 'line-v-last'
-					},
-					{
-						pattern: / {4}/,
-						alias: 'line-v-gap'
-					}
-				],
-				'entry-name': {
-					pattern: /.*\S.*/,
-					inside: {
-						// symlink
-						'operator': / -> /,
-					}
-				}
-			}
-		}
-	};
-
-	Prism.hooks.add('wrap', function (env) {
-		if (env.language === 'treeview' && env.type === 'entry-name') {
-			var classes = env.classes;
-
-			var folderPattern = /(^|[^\\])\/\s*$/;
-			if (folderPattern.test(env.content)) {
-				// folder
-
-				// remove trailing /
-				env.content = env.content.replace(folderPattern, '$1');
-				classes.push('dir');
-			} else {
-				// file
-
-				// remove trailing file marker
-				env.content = env.content.replace(/(^|[^\\])[=*|]\s*$/, '$1');
-
-				var parts = env.content.toLowerCase().replace(/\s+/g, '').split('.');
-				while (parts.length > 1) {
-					parts.shift();
-					// Ex. 'foo.min.js' would become '<span class="token keyword ext-min-js ext-js">foo.min.js</span>'
-					classes.push('ext-' + parts.join('-'));
-				}
-			}
-
-			if (env.content[0] === '.') {
-				classes.push('dotfile');
-			}
-		}
-	});
-}());