Use named Atproto API exports

Atproto 0.20 no longer includes BskyAgent or RichText on its default ESM export, which made BlueskyAgent construction fail at runtime.

app/social/clients/BlueskyClient.mjs

@@ -1,9 +1,7 @@
-import atprotoApi from '@atproto/api';
+import { BskyAgent, RichText } from '@atproto/api';
 import sharp from 'sharp';
 import Client from './Client.mjs';
 
-const { BskyAgent, RichText } = atprotoApi;
-
 export default class BlueskyClient extends Client
 {
   key = 'bluesky';

app/social/clients/BlueskyClient.test.mjs

@@ -0,0 +1,25 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { BskyAgent } from '@atproto/api';
+import BlueskyClient from './BlueskyClient.mjs';
+
+describe('BlueskyClient', () => {
+  afterEach(() => {
+    vi.restoreAllMocks();
+    vi.unstubAllEnvs();
+  });
+
+  it('logs in with the current Atproto agent API', async () => {
+    vi.stubEnv('BLUESKY_SERVICE', 'https://bsky.social');
+    vi.stubEnv('BLUESKY_IDENTIFIER', 'test.bsky.social');
+    vi.stubEnv('BLUESKY_PASSWORD', 'test-password');
+    const login = vi.spyOn(BskyAgent.prototype, 'login').mockResolvedValue();
+    const client = new BlueskyClient;
+
+    await client.login();
+
+    expect(login).toHaveBeenCalledWith({
+      identifier: 'test.bsky.social',
+      password: 'test-password',
+    });
+  });
+});