feat(admin): add delete APIs and UI actions for all admin resources

frontend/src/pages/admin/CompaniesPage.vue

@@ -13,10 +13,11 @@
       <el-table-column prop="company_key" label="Company Key" width="220" />
       <el-table-column prop="name" label="名稱" min-width="200" />
       <el-table-column prop="status" label="狀態" width="120" />
-      <el-table-column label="操作" width="200">
+      <el-table-column label="操作" width="280">
         <template #default="{ row }">
           <el-button size="small" @click="openEdit(row)">編輯</el-button>
           <el-button size="small" @click="openSites(row)">站台</el-button>
+          <el-button size="small" type="danger" @click="handleDelete(row)">刪除</el-button>
         </template>
       </el-table-column>
     </el-table>
@@ -64,9 +65,9 @@
 
 <script setup>
 import { ref, onMounted } from 'vue'
-import { ElMessage } from 'element-plus'
+import { ElMessage, ElMessageBox } from 'element-plus'
 import { Plus } from '@element-plus/icons-vue'
-import { getCompanies, createCompany, updateCompany, getCompanySites } from '@/api/companies'
+import { getCompanies, createCompany, updateCompany, deleteCompany, getCompanySites } from '@/api/companies'
 
 const companies = ref([])
 const loading = ref(false)
@@ -163,5 +164,21 @@ async function openSites(row) {
   }
 }
 
+async function handleDelete(row) {
+  try {
+    await ElMessageBox.confirm(
+      `確認刪除公司 ${row.name}（${row.company_key}）？此操作會一併刪除旗下站台與相關授權。`,
+      '刪除確認',
+      { type: 'warning' }
+    )
+    await deleteCompany(row.company_key)
+    ElMessage.success('刪除成功')
+    await load()
+  } catch (err) {
+    if (err === 'cancel') return
+    ElMessage.error(err.response?.data?.detail || '刪除失敗')
+  }
+}
+
 onMounted(load)
 </script>