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/astro/dist/env/vite-plugin-import-meta-env.d.ts

@@ -0,0 +1,7 @@
+import type * as vite from 'vite';
+import type { EnvLoader } from './env-loader.js';
+interface EnvPluginOptions {
+    envLoader: EnvLoader;
+}
+export declare function importMetaEnv({ envLoader }: EnvPluginOptions): vite.Plugin;
+export {};