feat(app): wire /map route + nav link

Lazy-loaded route in router.tsx and a "map" entry in the NAV_LINKS
array of NavBar.tsx so the new MapPage is reachable as a top-level
section alongside specs/plots/libraries/stats/palette/mcp.

Refs #5646

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: MarkusNeusinger

app/src/components/NavBar.tsx

@@ -10,6 +10,7 @@ const DEBUG_CLICK_WINDOW_MS = 800;
 const NAV_LINKS: { label: string; to: string; short?: string }[] = [
   { label: 'specs', to: '/specs' },
   { label: 'plots', to: '/plots' },
+  { label: 'map', to: '/map' },
   { label: 'libraries', to: '/libraries', short: 'libs' },
   { label: 'stats', to: '/stats' },
   { label: 'palette', to: '/palette', short: 'pal' },

app/src/router.tsx

@@ -36,6 +36,7 @@ const router = createBrowserRouter([
           { path: 'plots', lazy: () => import('./pages/PlotsPage').then(m => ({ Component: m.PlotsPage })) },
           { path: 'specs', lazy: () => import('./pages/SpecsListPage').then(m => ({ Component: m.SpecsListPage })) },
           { path: 'libraries', lazy: () => import('./pages/LibrariesPage').then(m => ({ Component: m.LibrariesPage })) },
+          { path: 'map', lazy: () => import('./pages/MapPage').then(m => ({ Component: m.MapPage })) },
           { path: 'palette', lazy: () => import('./pages/PalettePage').then(m => ({ Component: m.PalettePage })) },
           { path: 'about', lazy: () => import('./pages/AboutPage').then(m => ({ Component: m.AboutPage })) },
           { path: 'legal', lazy: () => import('./pages/LegalPage').then(m => ({ Component: m.LegalPage })) },