fix(email): preserve queued cancellation state

- track cancellations by operation sequence number
- retain stops issued before queued work begins
- add teardown cancellation for all pending operations
- add a dedicated cancelled mail error response

1 files changed, 7 insertions, 0 deletions

diff --git a/src/m_email/EMailNetError.cpp b/src/m_email/EMailNetError.cpp
index a6361a1..e1bc0b1 100644
--- a/src/m_email/EMailNetError.cpp
+++ b/src/m_email/EMailNetError.cpp
@@ -391,6 +391,13 @@ auto MailTlsRequiredError(const QString& host) -> MailError {
   return out;
 }
 
+auto MailCancelledError() -> MailError {
+  MailError out;
+  out.category = MailErrorCategory::kCANCELLED;
+  out.title = Tr("Stopped");
+  return out;
+}
+
 auto MailInternalError(const QString& what) -> MailError {
   MailError out;
   out.category = MailErrorCategory::kINTERNAL;