♻️ 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/postcss/lib/root.js

@@ -1,61 +0,0 @@
-'use strict'
-
-let Container = require('./container')
-
-let LazyResult, Processor
-
-class Root extends Container {
-  constructor(defaults) {
-    super(defaults)
-    this.type = 'root'
-    if (!this.nodes) this.nodes = []
-  }
-
-  normalize(child, sample, type) {
-    let nodes = super.normalize(child)
-
-    if (sample) {
-      if (type === 'prepend') {
-        if (this.nodes.length > 1) {
-          sample.raws.before = this.nodes[1].raws.before
-        } else {
-          delete sample.raws.before
-        }
-      } else if (this.first !== sample) {
-        for (let node of nodes) {
-          node.raws.before = sample.raws.before
-        }
-      }
-    }
-
-    return nodes
-  }
-
-  removeChild(child, ignore) {
-    let index = this.index(child)
-
-    if (!ignore && index === 0 && this.nodes.length > 1) {
-      this.nodes[1].raws.before = this.nodes[index].raws.before
-    }
-
-    return super.removeChild(child)
-  }
-
-  toResult(opts = {}) {
-    let lazy = new LazyResult(new Processor(), this, opts)
-    return lazy.stringify()
-  }
-}
-
-Root.registerLazyResult = dependant => {
-  LazyResult = dependant
-}
-
-Root.registerProcessor = dependant => {
-  Processor = dependant
-}
-
-module.exports = Root
-Root.default = Root
-
-Container.registerRoot(Root)