refactor(skills): remove subcategory field from skills

Drop subcategory column from database schema and update constraints
Remove subcategory handling from backend queries and API endpoints
Clean up frontend components and admin views to reflect the change

frontend/src/views/AdminView.vue

@@ -12,12 +12,11 @@ import {
   type Item,
   type NamedEntity,
   type Pokemon,
-  type Recipe,
-  type Skill
+  type Recipe
 } from '../services/api';
 
 type AdminTab = 'config' | 'pokemon' | 'items' | 'recipes' | 'habitats';
-type EditableConfig = (NamedEntity | Skill) & { subcategory?: string | null };
+type EditableConfig = NamedEntity;
 
 const tabs: Array<{ key: AdminTab; label: string }> = [
   { key: 'config', label: '系统配置' },
@@ -27,8 +26,8 @@ const tabs: Array<{ key: AdminTab; label: string }> = [
   { key: 'habitats', label: '栖息地' }
 ];
 
-const configTypes: Array<{ key: ConfigType; label: string; hasSubcategory?: boolean }> = [
-  { key: 'skills', label: '特长', hasSubcategory: true },
+const configTypes: Array<{ key: ConfigType; label: string }> = [
+  { key: 'skills', label: '特长' },
   { key: 'environments', label: '喜欢的环境' },
   { key: 'favorite-things', label: '喜欢的东西 / 标签' },
   { key: 'item-categories', label: '物品分类' },
@@ -48,7 +47,7 @@ const currentUser = ref<AuthUser | null>(null);
 const busy = ref(false);
 const contentLoading = ref(false);
 const message = ref('');
-const configForm = ref({ id: 0, name: '', subcategory: '' });
+const configForm = ref({ id: 0, name: '' });
 
 const selectedConfig = computed(() => configTypes.find((item) => item.key === activeConfigType.value) ?? configTypes[0]);
 const configTabs = computed<TabOption[]>(() => configTypes.map((item) => ({ value: item.key, label: item.label })));
@@ -87,18 +86,17 @@ async function loadConfig() {
 }
 
 function resetConfigForm() {
-  configForm.value = { id: 0, name: '', subcategory: '' };
+  configForm.value = { id: 0, name: '' };
 }
 
 function editConfig(item: EditableConfig) {
-  configForm.value = { id: item.id, name: item.name, subcategory: item.subcategory ?? '' };
+  configForm.value = { id: item.id, name: item.name };
 }
 
 async function saveConfig() {
   await run(async () => {
     const payload = {
-      name: configForm.value.name,
-      subcategory: selectedConfig.value.hasSubcategory ? configForm.value.subcategory || null : null
+      name: configForm.value.name
     };
 
     if (configForm.value.id) {
@@ -247,10 +245,6 @@ onMounted(() => {
           <label for="config-name">名称</label>
           <input id="config-name" v-model="configForm.name" required />
         </div>
-        <div v-if="selectedConfig.hasSubcategory" class="field">
-          <label for="config-subcategory">二级分类</label>
-          <input id="config-subcategory" v-model="configForm.subcategory" />
-        </div>
         <div class="form-actions">
           <button type="submit" class="link-button" :disabled="busy">{{ busy ? '保存中' : '保存' }}</button>
           <button type="button" class="plain-button" :disabled="busy" @click="resetConfigForm">新建</button>
@@ -260,7 +254,7 @@ onMounted(() => {
       <h3 class="section-subtitle">{{ selectedConfig.label }}</h3>
       <ul v-if="configRows.length" class="row-list">
         <li v-for="item in configRows" :key="item.id">
-          <span>{{ item.name }}<span v-if="item.subcategory"> · {{ item.subcategory }}</span></span>
+          <span>{{ item.name }}</span>
           <span class="row-actions">
             <button type="button" @click="editConfig(item)">编辑</button>
             <button type="button" @click="removeConfig(item.id)">删除</button>

frontend/src/views/HabitatEdit.vue

@@ -138,7 +138,7 @@ async function createMultiOption(selectKey: string, type: ConfigType, name: stri
   creatingSelect.value = selectKey;
   message.value = '';
   try {
-    const created = await api.createConfig(type, { name: cleanName, subcategory: null });
+    const created = await api.createConfig(type, { name: cleanName });
     await loadOptions();
     const value = String(created.id);
     if (!values.includes(value)) {

frontend/src/views/ItemEdit.vue

@@ -75,7 +75,7 @@ async function createSingleOption(selectKey: string, type: ConfigType, name: str
   creatingSelect.value = selectKey;
   message.value = '';
   try {
-    const created = await api.createConfig(type, { name: cleanName, subcategory: null });
+    const created = await api.createConfig(type, { name: cleanName });
     await loadOptions();
     assign(String(created.id));
   } catch (error) {
@@ -92,7 +92,7 @@ async function createMultiOption(selectKey: string, type: ConfigType, name: stri
   creatingSelect.value = selectKey;
   message.value = '';
   try {
-    const created = await api.createConfig(type, { name: cleanName, subcategory: null });
+    const created = await api.createConfig(type, { name: cleanName });
     await loadOptions();
     const value = String(created.id);
     if (!values.includes(value)) {

frontend/src/views/PokemonEdit.vue

@@ -69,7 +69,7 @@ async function createSingleOption(selectKey: string, type: ConfigType, name: str
   creatingSelect.value = selectKey;
   message.value = '';
   try {
-    const created = await api.createConfig(type, { name: cleanName, subcategory: null });
+    const created = await api.createConfig(type, { name: cleanName });
     await loadOptions();
     assign(String(created.id));
   } catch (error) {
@@ -86,7 +86,7 @@ async function createMultiOption(selectKey: string, type: ConfigType, name: stri
   creatingSelect.value = selectKey;
   message.value = '';
   try {
-    const created = await api.createConfig(type, { name: cleanName, subcategory: null });
+    const created = await api.createConfig(type, { name: cleanName });
     await loadOptions();
     const value = String(created.id);
     if (!values.includes(value)) {

frontend/src/views/RecipeEdit.vue

@@ -81,7 +81,7 @@ async function createMultiOption(selectKey: string, type: ConfigType, name: stri
   creatingSelect.value = selectKey;
   message.value = '';
   try {
-    const created = await api.createConfig(type, { name: cleanName, subcategory: null });
+    const created = await api.createConfig(type, { name: cleanName });
     await loadOptions();
     const value = String(created.id);
     if (!values.includes(value)) {