refactor(hero-config): 移除旧的本地导出hexport.ts功能

删除了前后端中与本地导出hexport.ts相关的API、页面按钮和实现代码，不再支持生成本地hexport.ts配置文件。

put/web/src/App.vue

@@ -5,7 +5,6 @@
       <div class="actions">
         <el-button size="small" @click="refreshMeta" :loading="loadingMeta">刷新配置数据</el-button>
         <el-button size="small" type="success" @click="doSave" :disabled="!heroes.length">保存到服务器</el-button>
-        <el-button size="small" type="warning" @click="doExport" :disabled="!heroes.length">导出 hexport.ts</el-button>
         <el-button size="small" type="primary" @click="doApply" :disabled="!heroes.length">写入 heroSet.ts</el-button>
         <el-button size="small" type="danger" @click="doExportCsv" :disabled="!heroes.length">导出英雄设计表.csv</el-button>
       </div>
@@ -375,22 +374,6 @@ async function doSave() {
   }
 }
 
-async function doExport() {
-  try {
-    await ElMessageBox.confirm(
-      `将写入 ${heroes.value.length} 个英雄到 assets/script/game/common/config/hexport.ts`,
-      '导出确认',
-      { confirmButtonText: '写入', cancelButtonText: '取消', type: 'warning' }
-    )
-  } catch { return }
-  try {
-    const r = await api.exportHeroes(heroes.value)
-    ElMessage.success(`已写入 ${r.bytes} 字节 → ${r.path}`)
-  } catch (e) {
-    ElMessage.error('导出失败: ' + (e?.response?.data?.error || e.message))
-  }
-}
-
 async function doApply() {
   try {
     await ElMessageBox.confirm(

put/web/src/api.js

@@ -5,8 +5,6 @@ export const api = {
   refresh: () => axios.post('/api/refresh').then((r) => r.data),
   fetchHeroes: () => axios.get('/api/heroes').then((r) => r.data),
   saveHeroes: (heroes) => axios.post('/api/heroes', { heroes }).then((r) => r.data),
-  exportHeroes: (heroes) => axios.post('/api/export', { heroes }).then((r) => r.data),
   applyHeroes: (heroes) => axios.post('/api/apply', { heroes }).then((r) => r.data),
   exportCsv: (heroes) => axios.post('/api/export-csv', { heroes }).then((r) => r.data),
-  fetchExport: () => axios.get('/api/export', { responseType: 'text' }).then((r) => r.data),
 }