♻️ 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
✅ Cookie consent banner included
✅ 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/nanoid/async/index.browser.js

@@ -1,34 +0,0 @@
-let random = async bytes => crypto.getRandomValues(new Uint8Array(bytes))
-let customAlphabet = (alphabet, defaultSize = 21) => {
-  let mask = (2 << (Math.log(alphabet.length - 1) / Math.LN2)) - 1
-  let step = -~((1.6 * mask * defaultSize) / alphabet.length)
-  return async (size = defaultSize) => {
-    let id = ''
-    while (true) {
-      let bytes = crypto.getRandomValues(new Uint8Array(step))
-      let i = step | 0
-      while (i--) {
-        id += alphabet[bytes[i] & mask] || ''
-        if (id.length === size) return id
-      }
-    }
-  }
-}
-let nanoid = async (size = 21) => {
-  let id = ''
-  let bytes = crypto.getRandomValues(new Uint8Array((size |= 0)))
-  while (size--) {
-    let byte = bytes[size] & 63
-    if (byte < 36) {
-      id += byte.toString(36)
-    } else if (byte < 62) {
-      id += (byte - 26).toString(36).toUpperCase()
-    } else if (byte < 63) {
-      id += '_'
-    } else {
-      id += '-'
-    }
-  }
-  return id
-}
-export { nanoid, customAlphabet, random }