fix: Bug - Files lose host on reload

Persist large uploads under app data on publish and restore, and re-announce hosted attachments after reload so peers can download again.

Co-authored-by: Cursor <cursoragent@cursor.com>

toju-app/src/app/domains/attachment/application/services/attachment-transfer.service.ts

@@ -12,7 +12,7 @@ import { isSharingFromThisDevice } from '../../domain/logic/attachment-sharing.r
 import {
   canReceiveAttachment,
   isAttachmentMedia,
-  shouldCopyUploaderMediaToAppData,
+  shouldCopyLargeUploaderFileToAppData,
   shouldPersistDownloadedAttachment,
   shouldStreamAttachmentReceiveToDisk
 } from '../../domain/logic/attachment.logic';
@@ -764,7 +764,7 @@ export class AttachmentTransferService {
       return;
     }
 
-    if (shouldCopyUploaderMediaToAppData(
+    if (shouldCopyLargeUploaderFileToAppData(
       attachment,
       attachment.filePath,
       this.attachmentStorage.canCopyFiles()
@@ -782,6 +782,41 @@ export class AttachmentTransferService {
     }
   }
 
+  async reannounceHostedAttachments(currentUserId: string | null | undefined): Promise<void> {
+    if (!currentUserId) {
+      return;
+    }
+
+    for (const [, attachments] of this.runtimeStore.getAttachmentEntries()) {
+      for (const attachment of attachments) {
+        if (!isSharingFromThisDevice(attachment, currentUserId)) {
+          continue;
+        }
+
+        const canServe = await this.attachmentStorage.resolveExistingPath(attachment);
+
+        if (!canServe) {
+          continue;
+        }
+
+        const fileAnnounceEvent: FileAnnounceEvent = {
+          type: 'file-announce',
+          messageId: attachment.messageId,
+          file: {
+            id: attachment.id,
+            filename: attachment.filename,
+            size: attachment.size,
+            mime: attachment.mime,
+            isImage: attachment.isImage,
+            uploaderPeerId: attachment.uploaderPeerId
+          }
+        };
+
+        this.webrtc.broadcastMessage(fileAnnounceEvent);
+      }
+    }
+  }
+
   private async applySavedPathObjectUrl(attachment: Attachment, savedPath: string | null): Promise<void> {
     if (!savedPath) {
       return;