♻️ 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/prismjs/components/prism-lilypond.min.js

@@ -1 +0,0 @@
-!function(e){for(var n='\\((?:[^();"#\\\\]|\\\\[^]|;.*(?!.)|"(?:[^"\\\\]|\\\\.)*"|#(?:\\{(?:(?!#\\})[^])*#\\}|[^{])|<expr>)*\\)',i=0;i<5;i++)n=n.replace(/<expr>/g,(function(){return n}));n=n.replace(/<expr>/g,"[^\\s\\S]");var d=e.languages.lilypond={comment:/%(?:(?!\{).*|\{[\s\S]*?%\})/,"embedded-scheme":{pattern:RegExp('(^|[=\\s])#(?:"(?:[^"\\\\]|\\\\.)*"|[^\\s()"]*(?:[^\\s()]|<expr>))'.replace(/<expr>/g,(function(){return n})),"m"),lookbehind:!0,greedy:!0,inside:{scheme:{pattern:/^(#)[\s\S]+$/,lookbehind:!0,alias:"language-scheme",inside:{"embedded-lilypond":{pattern:/#\{[\s\S]*?#\}/,greedy:!0,inside:{punctuation:/^#\{|#\}$/,lilypond:{pattern:/[\s\S]+/,alias:"language-lilypond",inside:null}}},rest:e.languages.scheme}},punctuation:/#/}},string:{pattern:/"(?:[^"\\]|\\.)*"/,greedy:!0},"class-name":{pattern:/(\\new\s+)[\w-]+/,lookbehind:!0},keyword:{pattern:/\\[a-z][-\w]*/i,inside:{punctuation:/^\\/}},operator:/[=|]|<<|>>/,punctuation:{pattern:/(^|[a-z\d])(?:'+|,+|[_^]?-[_^]?(?:[-+^!>._]|(?=\d))|[_^]\.?|[.!])|[{}()[\]<>^~]|\\[()[\]<>\\!]|--|__/,lookbehind:!0},number:/\b\d+(?:\/\d+)?\b/};d["embedded-scheme"].inside.scheme.inside["embedded-lilypond"].inside.lilypond.inside=d,e.languages.ly=d}(Prism);