♻️ 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/@astrojs/markdown-remark/dist/remark-collect-images.js

@@ -1,38 +0,0 @@
-import { isRemoteAllowed } from "@astrojs/internal-helpers/remote";
-import { definitions } from "mdast-util-definitions";
-import { visit } from "unist-util-visit";
-function remarkCollectImages(opts) {
-  const domains = opts?.domains ?? [];
-  const remotePatterns = opts?.remotePatterns ?? [];
-  return function(tree, vfile) {
-    if (typeof vfile?.path !== "string") return;
-    const definition = definitions(tree);
-    const localImagePaths = /* @__PURE__ */ new Set();
-    const remoteImagePaths = /* @__PURE__ */ new Set();
-    visit(tree, (node) => {
-      let url;
-      if (node.type === "image") {
-        url = decodeURI(node.url);
-      } else if (node.type === "imageReference") {
-        const imageDefinition = definition(node.identifier);
-        if (imageDefinition) {
-          url = decodeURI(imageDefinition.url);
-        }
-      }
-      if (!url) return;
-      if (URL.canParse(url)) {
-        if (isRemoteAllowed(url, { domains, remotePatterns })) {
-          remoteImagePaths.add(url);
-        }
-      } else if (!url.startsWith("/")) {
-        localImagePaths.add(url);
-      }
-    });
-    vfile.data.astro ??= {};
-    vfile.data.astro.localImagePaths = Array.from(localImagePaths);
-    vfile.data.astro.remoteImagePaths = Array.from(remoteImagePaths);
-  };
-}
-export {
-  remarkCollectImages
-};