fix: remove the unsent copy from Drafts when a send fails

lib/__tests__/jmap-draft-lifecycle.test.ts

@@ -208,8 +208,9 @@ describe('draft replace lifecycle (#849)', () => {
       'draft-old-1',
     )).rejects.toThrow();
 
+    // Only the unsent copy may go; the user's draft stays for a retry.
     for (const set of emailSetCalls(captured)) {
-      expect(set.destroy).toBeUndefined();
+      expect(set.destroy ?? []).not.toContain('draft-old-1');
     }
   });
 
@@ -242,7 +243,7 @@ describe('compose failure recovery', () => {
       // Only the missing submission is unconfirmed; a method error is a plain failure.
       options.missingSubmission ? SendUnconfirmedError : Error,
     );
-    expect(emailSetCalls(captured).some(call => call.destroy)).toBe(false);
+    expect(emailSetCalls(captured).some(call => (call.destroy as string[] | undefined)?.includes('old-draft'))).toBe(false);
   });
   it('accepts empty notCreated maps as success', async () => {
     const client = createClient(); mockFlow({ emptyErrors: true });

lib/__tests__/jmap-send-rejected-recipients.test.ts

@@ -225,6 +225,16 @@ describe('JMAPClient.sendEmail refused recipients (#1123)', () => {
     await expect(send(createClient())).rejects.toThrow('Sending is disabled.');
   });
 
+  it('removes the unsent copy from Drafts when the submission is refused', async () => {
+    // The copy was created in Drafts next to the user's own draft. Left
+    // there, every failed attempt added a duplicate that outlived the send.
+    const { destroyed } = mockServer({ refuseSubmission: true });
+
+    await expect(send(createClient(), { draftId: 'draft-1' })).rejects.toThrow('Sending is disabled.');
+
+    expect(destroyed).toEqual(['email-9']);
+  });
+
   it('treats a server that cannot answer the read-back as a plain success', async () => {
     mockServer({ noSubmissionGet: true });
 
@@ -288,6 +298,14 @@ describe('JMAPClient raw sends refused recipients (#1123)', () => {
     expect(destroyed).toEqual(['email-9']);
   });
 
+  it('sendRawEmail removes the imported copy when the submission is refused', async () => {
+    const { destroyed } = mockServer({ refuseSubmission: true });
+
+    await expect(rawClient().sendRawEmail(new Blob(['raw']), 'identity-1', 'mb-sent', 'mb-drafts'))
+      .rejects.toThrow('Sending is disabled.');
+    expect(destroyed).toEqual(['email-9']);
+  });
+
   it('submitRawEmail fails when every recipient was refused', async () => {
     const { requests } = mockServer({
       deliveryStatus: { 'gone@example.com': { delivered: 'no', smtpReply: MAILBOX_GONE, displayed: 'unknown' } },