test: add E2E test for clearing sent items (#867)

* test: add E2E test for clearing sent items

Add clear-sent.spec.ts verifying:
- Send a mail → verify it appears in sendbox → clear sent items → verify sendbox is empty

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* test: remove unused address variable

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

e2e/tests/api/clear-sent.spec.ts

@@ -0,0 +1,69 @@
+import { test, expect } from '@playwright/test';
+import {
+  WORKER_URL,
+  createTestAddress,
+  deleteAddress,
+  deleteAllMailpitMessages,
+  requestSendAccess,
+  onMailpitMessage,
+} from '../../fixtures/test-helpers';
+
+test.describe('Clear Sent Items', () => {
+  test.beforeEach(async ({ request }) => {
+    await deleteAllMailpitMessages(request);
+  });
+
+  test('send mail then clear sent items', async ({ request }) => {
+    const { jwt } = await createTestAddress(request, 'clear-sent');
+    await requestSendAccess(request, jwt);
+
+    try {
+      const subject = `Clear Sent Test ${Date.now()}`;
+
+      // Listen before sending
+      const listener = onMailpitMessage((m) => m.Subject === subject);
+      await listener.ready;
+
+      // Send a mail
+      const sendRes = await request.post(`${WORKER_URL}/api/send_mail`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+        data: {
+          from_name: 'Sender',
+          to_name: 'Recipient',
+          to_mail: 'recipient@test.example.com',
+          subject,
+          content: '<p>test</p>',
+          is_html: true,
+        },
+      });
+      expect(sendRes.ok()).toBe(true);
+      await listener.message;
+
+      // Verify sendbox has 1 item
+      const listRes = await request.get(`${WORKER_URL}/api/sendbox?limit=10&offset=0`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+      });
+      expect(listRes.ok()).toBe(true);
+      const { results } = await listRes.json();
+      expect(results.length).toBeGreaterThanOrEqual(1);
+
+      // Clear sent items
+      const clearRes = await request.delete(`${WORKER_URL}/api/clear_sent_items`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+      });
+      expect(clearRes.ok()).toBe(true);
+      const clearBody = await clearRes.json();
+      expect(clearBody.success).toBe(true);
+
+      // Verify sendbox is empty
+      const afterRes = await request.get(`${WORKER_URL}/api/sendbox?limit=10&offset=0`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+      });
+      expect(afterRes.ok()).toBe(true);
+      const after = await afterRes.json();
+      expect(after.results).toHaveLength(0);
+    } finally {
+      await deleteAddress(request, jwt);
+    }
+  });
+});