Fix #439: handle chunk load failures by reloading the page

When a new version is deployed and old chunks are replaced, users
with the old HTML in-session will encounter "Loading chunk N failed"
errors on lazy-loaded routes. Add a router.onError handler to detect
these failures and reload the page so the browser fetches fresh HTML
and updated chunk manifests.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/permission.js

@@ -72,3 +72,11 @@ router.afterEach(() => {
   // finish progress bar
   NProgress.done()
 })
+
+router.onError((error) => {
+  const pattern = /Loading chunk (\d)+ failed/g
+  const isChunkLoadFailed = error.message.match(pattern)
+  if (isChunkLoadFailed) {
+    window.location.reload()
+  }
+})