feat: Upgrade to Astro with full PDPA compliance

PDPA Features:
✅ Cookie consent banner
✅ Consent logging API
✅ Admin dashboard
✅ Privacy Policy
✅ Terms & Conditions

Technical:
✅ Astro 5.x + Tailwind v4
✅ Docker on port 80
✅ SQLite database
✅ 15 pages built

Ready for Easypanel deployment.

node_modules/node-domexception/index.js

@@ -0,0 +1,16 @@
+/*! node-domexception. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */
+
+if (!globalThis.DOMException) {
+  try {
+    const { MessageChannel } = require('worker_threads'),
+    port = new MessageChannel().port1,
+    ab = new ArrayBuffer()
+    port.postMessage(ab, [ab, ab])
+  } catch (err) {
+    err.constructor.name === 'DOMException' && (
+      globalThis.DOMException = err.constructor
+    )
+  }
+}
+
+module.exports = globalThis.DOMException