Add regression coverage for Tencent cloud catalog API requests

## Problem
The current test suite does not cover Tencent cloud catalog API requests.

## Expected behavior
- A focused Vitest case locks the existing behavior.
- The targeted test file passes and fails if the covered behavior regresses.

## Scope
Only add regression coverage for $(@{Slug=tencent-catalog; Focus=Tencent cloud catalog API requests; PrTitle=test(tencent-catalog): cover cloud catalog API requests; TestFile=web/src/api/__tests__/tencentCatalog.test.ts; Mode=new; Append=/*
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import MockAdapter from 'axios-mock-adapter';
import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import client from '../client';
import { listTencentInstances, listTencentRegions } from '../tencentCatalog';

const mock = new MockAdapter(client);

describe('tencentCatalog API', () => {
beforeEach(() => {
mock.reset();
});

afterEach(() => {
mock.reset();
});

it('lists Tencent regions for a credential', async () => {
const regions = [{ regionId: 'ap-guangzhou', regionName: '广州' }];
mock.onGet('/cloud/tencent/regions').reply((config) => {
expect(config.params).toEqual({ credentialId: 7 });
return [200, { data: regions }];
});

await expect(listTencentRegions(7)).resolves.toEqual(regions);
});

it('forwards optional search when listing Tencent instances', async () => {
const instances = [{ instanceId: 'rocketmq-prod', instanceName: 'prod' }];
mock.onGet('/cloud/tencent/instances').reply((config) => {
expect(config.params).toEqual({
credentialId: 7,
regionId: 'ap-guangzhou',
search: 'prod',
});
return [200, { data: instances }];
});

await expect(
listTencentInstances(7, 'ap-guangzhou', 'prod'),
).resolves.toEqual(instances);
});
});}.TestFile). No runtime behavior changes.

## Acceptance criteria
- [ ] The targeted Vitest file passes.
- [ ] git diff --check is clean.

Start with web/src/api/__tests__/tencentCatalog.test.ts and the imported web/src/api/tencentCatalog module, then run the targeted Vitest file to compare its existing API behavior with the requested coverage. Add focused checks for listing regions and instances, including request parameters and returned data; done means the targeted test passes and git diff --check is clean.

Written by the indexing model from the issue text.