♻️ 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/semver/functions/diff.js

@@ -1,60 +0,0 @@
-'use strict'
-
-const parse = require('./parse.js')
-
-const diff = (version1, version2) => {
-  const v1 = parse(version1, null, true)
-  const v2 = parse(version2, null, true)
-  const comparison = v1.compare(v2)
-
-  if (comparison === 0) {
-    return null
-  }
-
-  const v1Higher = comparison > 0
-  const highVersion = v1Higher ? v1 : v2
-  const lowVersion = v1Higher ? v2 : v1
-  const highHasPre = !!highVersion.prerelease.length
-  const lowHasPre = !!lowVersion.prerelease.length
-
-  if (lowHasPre && !highHasPre) {
-    // Going from prerelease -> no prerelease requires some special casing
-
-    // If the low version has only a major, then it will always be a major
-    // Some examples:
-    // 1.0.0-1 -> 1.0.0
-    // 1.0.0-1 -> 1.1.1
-    // 1.0.0-1 -> 2.0.0
-    if (!lowVersion.patch && !lowVersion.minor) {
-      return 'major'
-    }
-
-    // If the main part has no difference
-    if (lowVersion.compareMain(highVersion) === 0) {
-      if (lowVersion.minor && !lowVersion.patch) {
-        return 'minor'
-      }
-      return 'patch'
-    }
-  }
-
-  // add the `pre` prefix if we are going to a prerelease version
-  const prefix = highHasPre ? 'pre' : ''
-
-  if (v1.major !== v2.major) {
-    return prefix + 'major'
-  }
-
-  if (v1.minor !== v2.minor) {
-    return prefix + 'minor'
-  }
-
-  if (v1.patch !== v2.patch) {
-    return prefix + 'patch'
-  }
-
-  // high and low are prereleases
-  return 'prerelease'
-}
-
-module.exports = diff