feat(room): enforce minimum room name length of 2 characters in creation and editing

src/pages/Dashboard.jsx

@@ -205,6 +205,7 @@ export default function Dashboard() {
                 className="input-field"
                 placeholder={t('dashboard.roomNamePlaceholder')}
                 required
+                minLength={2}
               />
             </div>
 

src/pages/RoomDetail.jsx

@@ -502,6 +502,7 @@ export default function RoomDetail() {
               onChange={e => setEditRoom({ ...editRoom, name: e.target.value })}
               className="input-field"
               required
+              minLength={2}
             />
           </div>