Merge claude/1

AppTabbedManager.initialize() re-runs on every /app navigation (its
'initialized' flag is never set true), and setupURLMonitoring() /
setupTaskEventListeners() add window listeners (popstate, taskCreated/
Completed/Updated) unguarded — so each app-detail visit stacked another
listener set. Bind them once via a _listenersWired flag (mirrors the
existing _watchdogStarted guard). Pre-existing leak surfaced by the
feature-migration review.

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

containers/libreportal/frontend/js/components/app/app-tabbed-manager.js

@@ -708,11 +708,16 @@ class AppTabbedManager {
       this.switchTab('tasks');
     }
     
-    // Monitor URL changes for app navigation
-    this.setupURLMonitoring();
-    
-    // Listen for task creation events
-    this.setupTaskEventListeners();
+    // Monitor URL changes for app navigation + listen for task events. These
+    // add window-level listeners (popstate, taskCreated/Completed/Updated), so
+    // bind them ONCE for the lifetime of this singleton — initialize() re-runs
+    // on every /app navigation (the `initialized` flag is never set true), and
+    // without this guard each visit stacked another set of window listeners.
+    if (!this._listenersWired) {
+      this._listenersWired = true;
+      this.setupURLMonitoring();
+      this.setupTaskEventListeners();
+    }
     
     // Set initial active tab (only if no task parameter)
     if (!taskId) {