Refactor search-box module to await-style chooseFromApi

Move web_src/js/modules/fomantic/search.ts to web_src/js/modules/search.ts
(no Fomantic dependency anymore). Replace the imperative
initSearchBox(el, opts) with chooseFromApi(el, url, parse) that returns
a Promise<SearchResult> resolving with the user's chosen item; callers
loop with `while (box.isConnected) { const pick = await ...; ... }` and
own writing back to whatever input/state they manage.

Cleanup is via a single AbortController whose signal is passed to all
listeners; the in-flight fetch has its own controller so a new keystroke
can cancel just the request without tearing down listeners.

Co-Authored-By: Claude (Opus 4.7) <noreply@anthropic.com>

web_src/js/features/comp/SearchRepoBox.ts

@@ -1,26 +1,20 @@
-import {initSearchBox} from '../../modules/fomantic/search.ts';
-import {htmlEscape} from '../../utils/html.ts';
+import {chooseFromApi} from '../../modules/search.ts';
 
 const {appSubUrl} = window.config;
 
-export function initCompSearchRepoBox(el: HTMLElement) {
+export async function initCompSearchRepoBox(el: HTMLElement) {
   const uid = el.getAttribute('data-uid');
   const exclusive = el.getAttribute('data-exclusive');
   let url = `${appSubUrl}/repo/search?q={query}&uid=${uid}`;
-  if (exclusive === 'true') {
-    url += `&exclusive=true`;
+  if (exclusive === 'true') url += `&exclusive=true`;
+  const input = el.querySelector<HTMLInputElement>('input.prompt')!;
+
+  while (el.isConnected) {
+    const pick = await chooseFromApi(el, url, (response: any) => response.data.map((item: any) => ({
+      title: item.repository.full_name.split('/')[1],
+      description: item.repository.full_name,
+    })));
+    input.value = pick.title;
+    input.dispatchEvent(new Event('change', {bubbles: true}));
   }
-  initSearchBox(el, {
-    apiUrl: url,
-    onResponse(response: any) {
-      const items = [];
-      for (const item of response.data) {
-        items.push({
-          title: htmlEscape(item.repository.full_name.split('/')[1]),
-          description: htmlEscape(item.repository.full_name),
-        });
-      }
-      return {results: items};
-    },
-  });
 }