fix: improve accessibility and state management

1. **App.tsx**: Fix mobile sidebar overlay accessibility
   - Replace div with semantic button element for overlay
   - Remove redundant role and tabIndex attributes (implicit in button)
   - Add cursor-default to maintain visual consistency
   - Improves keyboard navigation and screen reader experience

2. **EntityDetailPanel.tsx**: Remove unnecessary key props
   - Remove key={entityId} from OperationsPanel, ConfigurationPanel, FaultsPanel
   - Previous behavior caused full component remount on entity change
   - This lost in-progress form state and execution history
   - Components now maintain state across entity selections when appropriate
   - More granular state management without losing user context

Author: bburda

src/App.tsx

@@ -110,16 +110,15 @@ function App() {
 
                 {/* Overlay for mobile when sidebar is open */}
                 {sidebarOpen && (
-                    <div
-                        className="fixed inset-0 z-30 bg-black/50 md:hidden"
+                    <button
+                        type="button"
+                        className="fixed inset-0 z-30 bg-black/50 md:hidden cursor-default"
                         onClick={() => setSidebarOpen(false)}
                         onKeyDown={(event) => {
                             if (event.key === 'Escape') {
                                 setSidebarOpen(false);
                             }
                         }}
-                        role="button"
-                        tabIndex={0}
                         aria-label="Close sidebar"
                     />
                 )}

src/components/EntityDetailPanel.tsx

@@ -126,11 +126,11 @@ function ComponentTabContent({
                 />
             );
         case 'operations':
-            return <OperationsPanel key={entityId} entityId={entityId} entityType={entityType} />;
+            return <OperationsPanel entityId={entityId} entityType={entityType} />;
         case 'configurations':
-            return <ConfigurationPanel key={entityId} entityId={entityId} entityType={entityType} />;
+            return <ConfigurationPanel entityId={entityId} entityType={entityType} />;
         case 'faults':
-            return <FaultsPanel key={entityId} entityId={entityId} entityType={entityType} />;
+            return <FaultsPanel entityId={entityId} entityType={entityType} />;
         default:
             return null;
     }