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/formdata-polyfill/esm.min.d.ts

@@ -0,0 +1,5 @@
+export declare const FormData: {
+  new (): FormData;
+  prototype: FormData;
+};
+export declare function formDataToBlob(formData: FormData): Blob;