chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

web_src/js/features/repo-milestone.ts

@@ -0,0 +1,9 @@
+export function initRepoMilestone() {
+  const page = document.querySelector('.repository.new.milestone');
+  if (!page) return;
+
+  const deadline = page.querySelector<HTMLInputElement>('form input[name=deadline]')!;
+  document.querySelector('#milestone-clear-deadline')!.addEventListener('click', () => {
+    deadline.value = '';
+  });
+}