Improve admin panel UX with toasts, evolution CRUD, sorting, drag-and-drop, and responsive layout

Add sonner toast notifications to all mutations, evolution management backend
(CRUD endpoints with search/pagination) and frontend (form modal with pokemon
selector, paginated list page), sortable AdminTable columns (Region/Gen/Year
on Games), drag-and-drop route reordering via @dnd-kit, skeleton loading states,
card-styled table wrappers, and responsive mobile nav in AdminLayout.

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

frontend/src/App.tsx

@@ -2,7 +2,13 @@ import { Routes, Route, Navigate } from 'react-router-dom'
 import { Layout } from './components'
 import { AdminLayout } from './components/admin'
 import { Home, NewRun, RunList, RunDashboard, RunEncounters } from './pages'
-import { AdminGames, AdminGameDetail, AdminPokemon, AdminRouteDetail } from './pages/admin'
+import {
+  AdminGames,
+  AdminGameDetail,
+  AdminPokemon,
+  AdminRouteDetail,
+  AdminEvolutions,
+} from './pages/admin'
 
 function App() {
   return (
@@ -19,6 +25,7 @@ function App() {
           <Route path="games/:gameId" element={<AdminGameDetail />} />
           <Route path="games/:gameId/routes/:routeId" element={<AdminRouteDetail />} />
           <Route path="pokemon" element={<AdminPokemon />} />
+          <Route path="evolutions" element={<AdminEvolutions />} />
         </Route>
       </Route>
     </Routes>