Convert frontend code to typescript (#31559)

None of the frontend js/ts files was touched besides these two commands
(edit: no longer true, I touched one file in
61105d0618
because of a deprecation that was not showing before the rename).

`tsc` currently reports 778 errors, so I have disabled it in CI as
planned.

Everything appears to work fine.

web_src/js/features/repo-settings.ts

@@ -0,0 +1,119 @@
+import $ from 'jquery';
+import {minimatch} from 'minimatch';
+import {createMonaco} from './codeeditor.ts';
+import {onInputDebounce, queryElems, toggleElem} from '../utils/dom.ts';
+import {POST} from '../modules/fetch.ts';
+
+const {appSubUrl, csrfToken} = window.config;
+
+export function initRepoSettingsCollaboration() {
+  // Change collaborator access mode
+  for (const dropdownEl of queryElems('.page-content.repository .ui.dropdown.access-mode')) {
+    const textEl = dropdownEl.querySelector(':scope > .text');
+    $(dropdownEl).dropdown({
+      async action(text, value) {
+        dropdownEl.classList.add('is-loading', 'loading-icon-2px');
+        const lastValue = dropdownEl.getAttribute('data-last-value');
+        $(dropdownEl).dropdown('hide');
+        try {
+          const uid = dropdownEl.getAttribute('data-uid');
+          await POST(dropdownEl.getAttribute('data-url'), {data: new URLSearchParams({uid, 'mode': value})});
+          textEl.textContent = text;
+          dropdownEl.setAttribute('data-last-value', value);
+        } catch {
+          textEl.textContent = '(error)'; // prevent from misleading users when error occurs
+          dropdownEl.setAttribute('data-last-value', lastValue);
+        } finally {
+          dropdownEl.classList.remove('is-loading');
+        }
+      },
+      onHide() {
+        // set to the really selected value, defer to next tick to make sure `action` has finished
+        // its work because the calling order might be onHide -> action
+        setTimeout(() => {
+          const $item = $(dropdownEl).dropdown('get item', dropdownEl.getAttribute('data-last-value'));
+          if ($item) {
+            $(dropdownEl).dropdown('set selected', dropdownEl.getAttribute('data-last-value'));
+          } else {
+            textEl.textContent = '(none)'; // prevent from misleading users when the access mode is undefined
+          }
+        }, 0);
+      },
+    });
+  }
+}
+
+export function initRepoSettingSearchTeamBox() {
+  const searchTeamBox = document.querySelector('#search-team-box');
+  if (!searchTeamBox) return;
+
+  $(searchTeamBox).search({
+    minCharacters: 2,
+    apiSettings: {
+      url: `${appSubUrl}/org/${searchTeamBox.getAttribute('data-org-name')}/teams/-/search?q={query}`,
+      headers: {'X-Csrf-Token': csrfToken},
+      onResponse(response) {
+        const items = [];
+        $.each(response.data, (_i, item) => {
+          items.push({
+            title: item.name,
+            description: `${item.permission} access`, // TODO: translate this string
+          });
+        });
+
+        return {results: items};
+      },
+    },
+    searchFields: ['name', 'description'],
+    showNoResults: false,
+  });
+}
+
+export function initRepoSettingGitHook() {
+  if (!$('.edit.githook').length) return;
+  const filename = document.querySelector('.hook-filename').textContent;
+  const _promise = createMonaco($('#content')[0], filename, {language: 'shell'});
+}
+
+export function initRepoSettingBranches() {
+  if (!document.querySelector('.repository.settings.branches')) return;
+
+  for (const el of document.querySelectorAll('.toggle-target-enabled')) {
+    el.addEventListener('change', function () {
+      const target = document.querySelector(this.getAttribute('data-target'));
+      target?.classList.toggle('disabled', !this.checked);
+    });
+  }
+
+  for (const el of document.querySelectorAll('.toggle-target-disabled')) {
+    el.addEventListener('change', function () {
+      const target = document.querySelector(this.getAttribute('data-target'));
+      if (this.checked) target?.classList.add('disabled'); // only disable, do not auto enable
+    });
+  }
+
+  document.querySelector('#dismiss_stale_approvals')?.addEventListener('change', function () {
+    document.querySelector('#ignore_stale_approvals_box')?.classList.toggle('disabled', this.checked);
+  });
+
+  // show the `Matched` mark for the status checks that match the pattern
+  const markMatchedStatusChecks = () => {
+    const patterns = (document.querySelector('#status_check_contexts').value || '').split(/[\r\n]+/);
+    const validPatterns = patterns.map((item) => item.trim()).filter(Boolean);
+    const marks = document.querySelectorAll('.status-check-matched-mark');
+
+    for (const el of marks) {
+      let matched = false;
+      const statusCheck = el.getAttribute('data-status-check');
+      for (const pattern of validPatterns) {
+        if (minimatch(statusCheck, pattern)) {
+          matched = true;
+          break;
+        }
+      }
+      toggleElem(el, matched);
+    }
+  };
+  markMatchedStatusChecks();
+  document.querySelector('#status_check_contexts').addEventListener('input', onInputDebounce(markMatchedStatusChecks));
+}