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/templates/env.mjs

@@ -0,0 +1,40 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
+// @ts-check
+import { schema } from 'virtual:astro:env/internal';
+import {
+	// biome-ignore lint/correctness/noUnusedImports: `_getEnv` is used by the generated code
+	getEnv as _getEnv,
+	createInvalidVariablesError,
+	getEnvFieldType,
+	setOnSetGetEnv,
+	validateEnvVariable,
+} from 'astro/env/runtime';
+
+// @ts-expect-error
+/** @returns {string} */
+// used while generating the virtual module
+// biome-ignore lint/correctness/noUnusedFunctionParameters: `key` is used by the generated code
+const getEnv = (key) => {
+	// @@GET_ENV@@
+};
+
+export const getSecret = (key) => {
+	return getEnv(key);
+};
+
+const _internalGetSecret = (key) => {
+	const rawVariable = getEnv(key);
+	const variable = rawVariable === '' ? undefined : rawVariable;
+	const options = schema[key];
+
+	const result = validateEnvVariable(variable, options);
+	if (result.ok) {
+		return result.value;
+	}
+	const type = getEnvFieldType(options);
+	throw createInvalidVariablesError(key, type, result);
+};
+
+setOnSetGetEnv(() => {
+	// @@ON_SET_GET_ENV@@
+});