♻️ 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-solution-file.min.js

@@ -1 +0,0 @@
-!function(n){var t={pattern:/\{[\da-f]{8}-[\da-f]{4}-[\da-f]{4}-[\da-f]{4}-[\da-f]{12}\}/i,alias:"constant",inside:{punctuation:/[{}]/}};n.languages["solution-file"]={comment:{pattern:/#.*/,greedy:!0},string:{pattern:/"[^"\r\n]*"|'[^'\r\n]*'/,greedy:!0,inside:{guid:t}},object:{pattern:/^([ \t]*)(?:([A-Z]\w*)\b(?=.*(?:\r\n?|\n)(?:\1[ \t].*(?:\r\n?|\n))*\1End\2(?=[ \t]*$))|End[A-Z]\w*(?=[ \t]*$))/m,lookbehind:!0,greedy:!0,alias:"keyword"},property:{pattern:/^([ \t]*)(?!\s)[^\r\n"#=()]*[^\s"#=()](?=\s*=)/m,lookbehind:!0,inside:{guid:t}},guid:t,number:/\b\d+(?:\.\d+)*\b/,boolean:/\b(?:FALSE|TRUE)\b/,operator:/=/,punctuation:/[(),]/},n.languages.sln=n.languages["solution-file"]}(Prism);