feat: add shared PostgreSQL client deletion

frontend/postgres-admin/App.vue

@@ -161,6 +161,21 @@ async function revokeClient(client: Client) {
   await loadAll();
 }
 
+async function deleteClient(client: Client) {
+  await ElMessageBox.confirm(
+    `删除后 ${client.displayName} 的数据库 ${client.databaseName} 和角色 ${client.roleName} 将被彻底销毁，不可恢复。`,
+    "删除接入应用",
+    { type: "warning", confirmButtonText: "确认删除", confirmButtonClass: "el-button--danger" }
+  );
+  const { value } = await ElMessageBox.prompt(
+    `请输入 ${client.appId} 确认删除。`,
+    "二次确认",
+    { type: "warning" }
+  );
+  await api(`/api/v1/clients/${encodeURIComponent(client.appId)}?confirmation=${encodeURIComponent(value)}`, { method: "DELETE" });
+  await loadAll();
+}
+
 async function createDatabase() {
   const { value: name } = await ElMessageBox.prompt("仅允许小写字母、数字和下划线。", "新建数据库", { inputPattern: /^[a-z][a-z0-9_]{2,62}$/, inputErrorMessage: "数据库名称格式无效" });
   await api("/api/v1/databases", { method: "POST", body: JSON.stringify({ name }) });
@@ -285,7 +300,7 @@ onMounted(async () => {
           <el-table-column prop="roleName" label="角色" min-width="190" />
           <el-table-column label="扩展"><template #default="{ row }">{{ row.extensions.join(", ") || "-" }}</template></el-table-column>
           <el-table-column label="状态"><template #default="{ row }"><el-tag :type="row.status === 'active' ? 'success' : 'danger'">{{ row.status === "active" ? "正常" : "已吊销" }}</el-tag></template></el-table-column>
-          <el-table-column label="操作" width="190" fixed="right"><template #default="{ row }"><el-button size="small" @click="rotateClient(row)">轮换密码</el-button><el-button size="small" type="danger" plain @click="revokeClient(row)">吊销</el-button></template></el-table-column>
+          <el-table-column label="操作" width="190" fixed="right"><template #default="{ row }"><el-button size="small" @click="rotateClient(row)">轮换密码</el-button><el-button size="small" type="danger" plain @click="revokeClient(row)">吊销</el-button><el-button size="small" type="danger" @click="deleteClient(row)">删除</el-button></template></el-table-column>
         </el-table>
       </section>