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-env.d.ts

@@ -0,0 +1,10 @@
+import type { Plugin } from 'vite';
+import type { AstroSettings } from '../types/astro.js';
+import type { EnvLoader } from './env-loader.js';
+interface AstroEnvPluginParams {
+    settings: AstroSettings;
+    sync: boolean;
+    envLoader: EnvLoader;
+}
+export declare function astroEnv({ settings, sync, envLoader }: AstroEnvPluginParams): Plugin;
+export {};