chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

web_src/js/modules/fomantic/tab.ts

@@ -0,0 +1,18 @@
+import {queryElemSiblings} from '../../utils/dom.ts';
+
+export function initTabSwitcher(tabItemContainer: Element) {
+  // Clicking a `.item[data-tab]` menu item activates the matching `.ui.tab[data-tab=...]` panel
+  // This design is from Fomantic UI, and it has problems like :
+  // * The panel selector is global, callers should make sure the "data-tab" values don't conflict on the same page
+  const tabItems = tabItemContainer.querySelectorAll('.item[data-tab]');
+  for (const elItem of tabItems) {
+    const tabName = elItem.getAttribute('data-tab')!;
+    elItem.addEventListener('click', () => {
+      const elPanel = document.querySelector(`.ui.tab[data-tab="${CSS.escape(tabName)}"]`)!;
+      queryElemSiblings(elPanel, '.ui.tab', (el) => el.classList.remove('active'));
+      queryElemSiblings(elItem, '.item[data-tab]', (el) => el.classList.remove('active'));
+      elItem.classList.add('active');
+      elPanel.classList.add('active');
+    });
+  }
+}