♻️ 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

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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/prismjs/components/prism-dart.min.js

@@ -1 +0,0 @@
-!function(e){var a=[/\b(?:async|sync|yield)\*/,/\b(?:abstract|assert|async|await|break|case|catch|class|const|continue|covariant|default|deferred|do|dynamic|else|enum|export|extends|extension|external|factory|final|finally|for|get|hide|if|implements|import|in|interface|library|mixin|new|null|on|operator|part|rethrow|return|set|show|static|super|switch|sync|this|throw|try|typedef|var|void|while|with|yield)\b/],n="(^|[^\\w.])(?:[a-z]\\w*\\s*\\.\\s*)*(?:[A-Z]\\w*\\s*\\.\\s*)*",s={pattern:RegExp(n+"[A-Z](?:[\\d_A-Z]*[a-z]\\w*)?\\b"),lookbehind:!0,inside:{namespace:{pattern:/^[a-z]\w*(?:\s*\.\s*[a-z]\w*)*(?:\s*\.)?/,inside:{punctuation:/\./}}}};e.languages.dart=e.languages.extend("clike",{"class-name":[s,{pattern:RegExp(n+"[A-Z]\\w*(?=\\s+\\w+\\s*[;,=()])"),lookbehind:!0,inside:s.inside}],keyword:a,operator:/\bis!|\b(?:as|is)\b|\+\+|--|&&|\|\||<<=?|>>=?|~(?:\/=?)?|[+\-*\/%&^|=!<>]=?|\?/}),e.languages.insertBefore("dart","string",{"string-literal":{pattern:/r?(?:("""|''')[\s\S]*?\1|(["'])(?:\\.|(?!\2)[^\\\r\n])*\2(?!\2))/,greedy:!0,inside:{interpolation:{pattern:/((?:^|[^\\])(?:\\{2})*)\$(?:\w+|\{(?:[^{}]|\{[^{}]*\})*\})/,lookbehind:!0,inside:{punctuation:/^\$\{?|\}$/,expression:{pattern:/[\s\S]+/,inside:e.languages.dart}}},string:/[\s\S]+/}},string:void 0}),e.languages.insertBefore("dart","class-name",{metadata:{pattern:/@\w+/,alias:"function"}}),e.languages.insertBefore("dart","class-name",{generics:{pattern:/<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<[\w\s,.&?]*>)*>)*>)*>/,inside:{"class-name":s,keyword:a,punctuation:/[<>(),.:]/,operator:/[?&|]/}}})}(Prism);