fix(triage): fix missed setCurrentPage('reporting') in Archer ticket filter button

One reference to the old page ID was missed in the previous rename commit.
The Archer ticket EXC filter button in App.js was still navigating to
'reporting', which would silently fail to navigate. Updated to 'triage'.

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

frontend/src/App.js

@@ -2337,7 +2337,7 @@ export default function App() {
                       </a>
                       <div className="flex gap-1">
                         <button
-                          onClick={() => { setReportingExcFilter(ticket.exc_number); setCurrentPage('reporting'); }}
+                          onClick={() => { setReportingExcFilter(ticket.exc_number); setCurrentPage('triage'); }}
                           title="View findings referencing this ticket"
                           className="text-gray-400 hover:text-sky-400 transition-colors"
                         >