Preserve channel reply context through attachment preparation

src/media_async/attachment_send.c

@@ -66,6 +66,7 @@ static void attachment_publish(struct attachment_send_req* req, int error) {
     if (error || req->error || attachment_validate(&req->info)) {
         chat_event_attachment(req->inst, req->is_dm, req->target, req->id, 2);
         DEBUG_ERROR(DEBUG_CATEGORY_MEDIA, "attachment: preparation failed target=%s error=%d worker=%d", req->target, error, req->error);
+        chat_event_submitted(req->inst, req->request_id, 0);
         if (remove(req->output) && errno != ENOENT) DEBUG_WARN(DEBUG_CATEGORY_MEDIA, "attachment: output cleanup failed path=%s", req->output);
         u_free(req); return;
     }
@@ -92,6 +93,7 @@ static void attachment_publish(struct attachment_send_req* req, int error) {
         struct chat_msg_submit* message = u_calloc(1, sizeof(*message) + length);
         if (message) {
             message->inst = req->inst;
+            memcpy(message->reply_to, req->reply_to, 32); message->request_id = req->request_id;
             snprintf(message->channel_id, sizeof(message->channel_id), "%s", req->target);
             snprintf(message->content_type, sizeof(message->content_type), "%s", attachment_content_type(req->info.kind));
             snprintf(message->media_src, sizeof(message->media_src), "%s", req->output);
@@ -101,6 +103,7 @@ static void attachment_publish(struct attachment_send_req* req, int error) {
             chat_core_submit_trampoline(message);
         } else {
             DEBUG_ERROR(DEBUG_CATEGORY_MEDIA, "attachment: channel dispatch allocation failed");
+            chat_event_submitted(req->inst, req->request_id, 0);
             chat_event_attachment(req->inst, req->is_dm, req->target, req->id, 2);
             if (remove(req->output)) DEBUG_WARN(DEBUG_CATEGORY_MEDIA, "attachment: rejected output cleanup failed");
         }

src/media_async/attachment_send.h

@@ -17,6 +17,8 @@ struct attachment_send_req {
     struct UTUN_INSTANCE* inst;
     char target[64]; /* Десятичный channel_id либо conv_id без префикса dm:, зафиксированный до подготовки. */
     int is_dm;
+    uint8_t reply_to[32]; /* Оригинал канального ответа, зафиксированный до подготовки. */
+    uint64_t request_id;  /* CHAT_EVT_MSG_SUBMITTED после публикации либо ошибки. */
     struct attachment_info info;
     uint8_t id[16];
     char source[1024], output[1024];