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/whatwg-url/lib/utils.js

@@ -0,0 +1,20 @@
+"use strict";
+
+module.exports.mixin = function mixin(target, source) {
+  const keys = Object.getOwnPropertyNames(source);
+  for (let i = 0; i < keys.length; ++i) {
+    Object.defineProperty(target, keys[i], Object.getOwnPropertyDescriptor(source, keys[i]));
+  }
+};
+
+module.exports.wrapperSymbol = Symbol("wrapper");
+module.exports.implSymbol = Symbol("impl");
+
+module.exports.wrapperForImpl = function (impl) {
+  return impl[module.exports.wrapperSymbol];
+};
+
+module.exports.implForWrapper = function (wrapper) {
+  return wrapper[module.exports.implSymbol];
+};
+