♻️ 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/mdast-util-to-markdown/lib/handle/emphasis.js

@@ -1,69 +0,0 @@
-/**
- * @import {Info, State} from 'mdast-util-to-markdown'
- * @import {Emphasis, Parents} from 'mdast'
- */
-
-import {checkEmphasis} from '../util/check-emphasis.js'
-import {encodeCharacterReference} from '../util/encode-character-reference.js'
-import {encodeInfo} from '../util/encode-info.js'
-
-emphasis.peek = emphasisPeek
-
-/**
- * @param {Emphasis} node
- * @param {Parents | undefined} _
- * @param {State} state
- * @param {Info} info
- * @returns {string}
- */
-export function emphasis(node, _, state, info) {
-  const marker = checkEmphasis(state)
-  const exit = state.enter('emphasis')
-  const tracker = state.createTracker(info)
-  const before = tracker.move(marker)
-
-  let between = tracker.move(
-    state.containerPhrasing(node, {
-      after: marker,
-      before,
-      ...tracker.current()
-    })
-  )
-  const betweenHead = between.charCodeAt(0)
-  const open = encodeInfo(
-    info.before.charCodeAt(info.before.length - 1),
-    betweenHead,
-    marker
-  )
-
-  if (open.inside) {
-    between = encodeCharacterReference(betweenHead) + between.slice(1)
-  }
-
-  const betweenTail = between.charCodeAt(between.length - 1)
-  const close = encodeInfo(info.after.charCodeAt(0), betweenTail, marker)
-
-  if (close.inside) {
-    between = between.slice(0, -1) + encodeCharacterReference(betweenTail)
-  }
-
-  const after = tracker.move(marker)
-
-  exit()
-
-  state.attentionEncodeSurroundingInfo = {
-    after: close.outside,
-    before: open.outside
-  }
-  return before + between + after
-}
-
-/**
- * @param {Emphasis} _
- * @param {Parents | undefined} _1
- * @param {State} state
- * @returns {string}
- */
-function emphasisPeek(_, _1, state) {
-  return state.options.emphasis || '*'
-}