feat(ui): use modal dialogs for entity creation and editing

Introduce reusable Modal component for forms
Update router to preserve scroll position when toggling modals
Refactor admin and entity views to render editors as overlays

frontend/src/views/PokemonDetail.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, onMounted, ref } from 'vue';
+import { computed, onMounted, ref, watch } from 'vue';
 import { useI18n } from 'vue-i18n';
 import { useRoute } from 'vue-router';
 import DetailSection from '../components/DetailSection.vue';
@@ -9,6 +9,7 @@ import PageHeader from '../components/PageHeader.vue';
 import Skeleton from '../components/Skeleton.vue';
 import Tabs, { type TabOption } from '../components/Tabs.vue';
 import { api, type PokemonDetail } from '../services/api';
+import PokemonEdit from './PokemonEdit.vue';
 
 const route = useRoute();
 const { t } = useI18n();
@@ -98,6 +99,7 @@ const habitatRows = computed<HabitatRow[]>(() => {
   }));
 });
 const skillDropRows = computed(() => pokemon.value?.skills.filter((skill) => skill.itemDrop) ?? []);
+const showEditor = computed(() => route.name === 'pokemon-edit');
 const itemCategoryTabs = computed<TabOption[]>(() => {
   const categories = new Map<string, string>();
 
@@ -119,9 +121,30 @@ const favoriteThingItems = computed(() => {
   return items.filter((item) => String(item.category.id) === itemCategoryTab.value);
 });
 
-onMounted(async () => {
+async function loadPokemonDetail() {
   pokemon.value = await api.pokemonDetail(String(route.params.id));
+}
+
+onMounted(async () => {
+  await loadPokemonDetail();
 });
+
+watch(
+  () => route.name,
+  (name, oldName) => {
+    if (oldName === 'pokemon-edit' && name === 'pokemon-detail') {
+      void loadPokemonDetail();
+    }
+  }
+);
+
+watch(
+  () => route.params.id,
+  () => {
+    pokemon.value = null;
+    void loadPokemonDetail();
+  }
+);
 </script>
 
 <template>
@@ -259,4 +282,6 @@ onMounted(async () => {
       <EditHistoryPanel :entity="pokemon" :history="pokemon.editHistory" />
     </div>
   </section>
+
+  <PokemonEdit v-if="showEditor" />
 </template>