polish(ui): full-system layout audit, header titles for all routes, dialog title truncation

- headless DOM audit (Edge dump, 1440/390 x 10 routes): no real horizontal page overflow on any screen size; timeline bleed & drawer offsets are intentional and verified benign
- header now labels profile/resume/assessment/admin routes (was blank h1 on those pages)
- dialog header truncates long titles instead of pushing controls out
- page containers audited for consistent rhythm (1080/1280/880 widths share identical paddings)
- www rebuilt, temp instrumentation removed

app/src/main.tsx

@@ -5,6 +5,8 @@ import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import App from './App';
 import './styles/theme.css';
 
+
+
 const queryClient = new QueryClient({
   defaultOptions: {
     queries: { retry: 1, refetchOnWindowFocus: true, staleTime: 0, gcTime: 0 }
@@ -40,4 +42,4 @@ ReactDOM.createRoot(document.getElementById('root')!).render(
       </HashRouter>
     </QueryClientProvider>
   </React.StrictMode>
-);
+);