Merge claude/2

/app/<name>/config/<sub> URLs (e.g. .../config/ports) are generated by the app
itself and shown in the address bar, but a refresh or deep-link always reset to
the first config category. Cause: showAppDetail() rebuilt the URL via
appPath(appName, targetTab) with NO sub argument and pushState'd it BEFORE
renderAppDetail() read the sub back off the path — so the /<sub> segment was
already gone and preferredCategory stayed null.

Preserve the sub when the URL already points at this app's config (matched by
appPartsFromPath().app === appName), so cold-load/refresh lands on the encoded
sub-tab. Cross-app switches still start at the first category. The sibling
showAppDetailWithConfig() (the grid 'manage' button) is intentionally left to
land on the first category.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>

containers/libreportal/frontend/components/apps/core/js/apps-manager.js

@@ -373,8 +373,20 @@ class AppsManager {
       const currentUrl = new URL(window.location.href);
       targetTab = currentUrl.searchParams.get('tab') || 'config';
     }
-    
-    const newUrl = window.appPath(appName, targetTab);
+
+    // Preserve the config sub-category (/app/<name>/config/<sub>) when the URL
+    // already points at THIS app's config. Without this, rebuilding the URL
+    // here strips the sub before renderAppDetail reads it back off the path, so
+    // a cold-load deep-link / refresh of e.g. /app/bookstack/config/ports always
+    // reset to the first category. Only kept for the same app — a cross-app
+    // switch intentionally starts at the first category.
+    let targetSub = null;
+    if (targetTab === 'config' && window.appPartsFromPath) {
+      const parts = window.appPartsFromPath(window.location.pathname);
+      if (parts.tab === 'config' && parts.app === appName) targetSub = parts.sub;
+    }
+
+    const newUrl = window.appPath(appName, targetTab, targetSub);
     history.pushState({}, '', newUrl);
 
     // Update app-tabbed-manager BEFORE rendering the DOM. If renderAppDetail or