Clear lint warnings from the audit branch (deps + extract NotFound)

- CreationWizard: add sys.skills to the loader effect's deps (stable singleton).
- Extract NotFound to src/app/NotFound.tsx so router.tsx no longer trips
  react-refresh/only-export-components.

Branch is now warning-clean (the 3 remaining eslint errors are pre-existing on master,
in files this branch does not touch).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/NotFound.tsx

@@ -0,0 +1,12 @@
+import { Link } from '@tanstack/react-router';
+
+/** Shown for any URL outside the app's routes (previously rendered a blank shell). */
+export function NotFound() {
+  return (
+    <div className="p-10 text-center">
+      <h1 className="font-display text-2xl font-semibold text-ink">Page not found</h1>
+      <p className="mt-2 text-muted">That page doesn’t exist or has moved.</p>
+      <Link to="/" className="mt-4 inline-block text-accent hover:underline">Back to campaigns</Link>
+    </div>
+  );
+}

src/features/characters/builder/CreationWizard.tsx

@@ -134,7 +134,8 @@ export function CreationWizard({ campaign, onClose }: { campaign: Campaign; onCl
       void loadPf2e('backgrounds').then((bs) => on && setBackgrounds(dedupeByName(bs.map((b) => ({ name: String(b.name), desc: briefOverview(String((b.description ?? b.text) ?? '')) })))));
     }
     return () => { on = false; };
-  }, [system]);
+    // sys.skills is a stable singleton keyed by `system`, so `system` covers it.
+  }, [system, sys.skills]);
 
   // ---- selections ----
   const [step, setStep] = useState(0);

src/router.tsx

@@ -1,5 +1,6 @@
-import { createRootRoute, createRoute, createRouter, Link } from '@tanstack/react-router';
+import { createRootRoute, createRoute, createRouter } from '@tanstack/react-router';
 import { RootLayout } from '@/app/RootLayout';
+import { NotFound } from '@/app/NotFound';
 import { CampaignsPage } from '@/features/campaigns/CampaignsPage';
 import { CharactersPage } from '@/features/characters/CharactersPage';
 import { CharacterSheetPage } from '@/features/characters/CharacterSheetPage';
@@ -62,17 +63,6 @@ const routeTree = rootRoute.addChildren([
   assistantRoute,
 ]);
 
-/** Shown for any URL outside the routes above (previously rendered a blank shell). */
-function NotFound() {
-  return (
-    <div className="p-10 text-center">
-      <h1 className="font-display text-2xl font-semibold text-ink">Page not found</h1>
-      <p className="mt-2 text-muted">That page doesn’t exist or has moved.</p>
-      <Link to="/" className="mt-4 inline-block text-accent hover:underline">Back to campaigns</Link>
-    </div>
-  );
-}
-
 export const router = createRouter({ routeTree, defaultPreload: 'intent', defaultNotFoundComponent: NotFound });
 
 declare module '@tanstack/react-router' {