feat: Add complete PDPA compliance pages

- Admin dashboard (/admin/consent-logs) with password auth
- Consent API (/api/consent) with SQLite + IP hashing
- Privacy Policy (Thai) - PDPA Section 36 compliant
- Terms & Conditions (Thai) - 9 standard clauses
- .env.example template with Umami placeholder

All pages preserve current design system.

dealplustech-astro/node_modules/cross-fetch/index.d.ts

@@ -0,0 +1,14 @@
+/// <reference lib="dom" />
+
+declare const _fetch: typeof fetch;
+declare const _Request: typeof Request;
+declare const _Response: typeof Response;
+declare const _Headers: typeof Headers;
+
+declare module "cross-fetch" {
+  export const fetch: typeof _fetch;
+  export const Request: typeof _Request;
+  export const Response: typeof _Response;
+  export const Headers: typeof _Headers;
+  export default fetch;
+}