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/preferences/defaults.d.ts

@@ -0,0 +1,16 @@
+export declare const DEFAULT_PREFERENCES: {
+    devToolbar: {
+        /** Specifies whether the user has the Dev Overlay enabled */
+        enabled: boolean;
+    };
+    checkUpdates: {
+        /** Specifies whether the user has the update check enabled */
+        enabled: boolean;
+    };
+    _variables: {
+        /** Time since last update check */
+        lastUpdateCheck: number;
+    };
+};
+export type Preferences = typeof DEFAULT_PREFERENCES;
+export type PublicPreferences = Omit<Preferences, '_variables'>;