fix(webui): preserve import tab refresh URLs

- stop the legacy shell bootstrap from collapsing /import/auto and /import/singles back to the import root on reload\n- update the shell route smoke test to expect the canonical /import/album redirect for the bare import page

webui/static/search.js

@@ -1190,9 +1190,7 @@ async function loadInitialData() {
         if (route?.kind === 'react') {
             showReactHost(targetPage);
             setActivePageChrome(targetPage);
-            if (window.location.pathname !== route.path) {
-                history.replaceState({ page: targetPage }, '', route.path);
-            }
+            // Keep nested react-tab URLs like /import/auto or /import/singles intact.
             return;
         }
 

webui/tests/shell-routes.smoke.spec.ts

@@ -60,6 +60,10 @@ function expectedUrlPattern(path: string, pageId: ShellPageId): RegExp {
     return /\/stats(?:\?range=7d)?$/;
   }
 
+  if (pageId === 'import') {
+    return /\/import\/album$/;
+  }
+
   return new RegExp(`${path.replace('/', '\\/')}$`);
 }