JS refactors (#22227)

- Replace all default exports with named exports, except for Vue SFCs
- Remove names from Vue SFCs, they are automatically inferred from the
filename
- Misc whitespace-related tweaks

web_src/js/features/repo-graph.js

@@ -1,6 +1,6 @@
 import $ from 'jquery';
 
-export default function initRepoGraphGit() {
+export function initRepoGraphGit() {
   const graphContainer = document.getElementById('git-graph-container');
   if (!graphContainer) return;