feat(admin): sessions management screen (list + filter + actions)

apps/admin/src/App.tsx

@@ -4,6 +4,7 @@ import Login from './screens/Login';
 import Sidebar from './components/Sidebar';
 import Live from './screens/Live';
 import Activities from './screens/Activities';
+import Sessions from './screens/Sessions';
 
 function AuthedShell() {
   return (
@@ -14,6 +15,7 @@ function AuthedShell() {
           <Routes>
             <Route path="/" element={<Live />} />
             <Route path="/handelingen" element={<Activities />} />
+            <Route path="/sessies" element={<Sessions />} />
           </Routes>
         </main>
       </div>