♻️ 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/astro/dist/actions/runtime/route.js

@@ -1,23 +0,0 @@
-import { getActionContext } from "./server.js";
-const POST = async (context) => {
-  const { action, serializeActionResult } = getActionContext(context);
-  if (action?.calledFrom !== "rpc") {
-    return new Response("Not found", { status: 404 });
-  }
-  const result = await action.handler();
-  const serialized = serializeActionResult(result);
-  if (serialized.type === "empty") {
-    return new Response(null, {
-      status: serialized.status
-    });
-  }
-  return new Response(serialized.body, {
-    status: serialized.status,
-    headers: {
-      "Content-Type": serialized.contentType
-    }
-  });
-};
-export {
-  POST
-};