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-persistence.service.ts

@@ -13,6 +13,7 @@ import {
 } from '../../domain/logic/attachment-blob.rules';
 import { isBlobObjectUrl, needsBlobObjectUrlForInlineDisplay } from '../../domain/logic/attachment-display-url.rules';
 import { mergeAttachmentLocalPaths } from '../../domain/logic/attachment-persistence.rules';
+import { isAttachmentMedia } from '../../domain/logic/attachment.logic';
 import { AttachmentRuntimeStore } from './attachment-runtime.store';
 
 @Injectable({ providedIn: 'root' })
@@ -118,7 +119,7 @@ export class AttachmentPersistenceService {
   }
 
   async tryRestoreAttachmentFromLocal(attachment: Attachment): Promise<boolean> {
-    const restored = await this.ensureInlineDisplayObjectUrl(attachment);
+    const restored = await this.ensurePersistedUploadHost(attachment);
 
     if (restored) {
       attachment.requestError = undefined;
@@ -127,6 +128,41 @@ export class AttachmentPersistenceService {
     return restored;
   }
 
+  async ensurePersistedUploadHost(attachment: Attachment): Promise<boolean> {
+    const existingPath = await this.attachmentStorage.resolveExistingPath(attachment);
+
+    if (existingPath) {
+      return this.hydrateAttachmentFromStoredPath(attachment, existingPath);
+    }
+
+    if (!attachment.filePath?.trim() || !this.attachmentStorage.canCopyFiles()) {
+      return false;
+    }
+
+    const savedPath = await this.persistUploadCopyFromSourcePath(attachment, attachment.filePath);
+
+    if (!savedPath) {
+      attachment.filePath = undefined;
+      void this.persistAttachmentMeta(attachment);
+      return false;
+    }
+
+    return this.hydrateAttachmentFromStoredPath(attachment, savedPath);
+  }
+
+  private async hydrateAttachmentFromStoredPath(attachment: Attachment, diskPath: string): Promise<boolean> {
+    attachment.savedPath = diskPath;
+
+    if (isAttachmentMedia(attachment)) {
+      return this.ensureInlineDisplayObjectUrl(attachment);
+    }
+
+    attachment.available = true;
+    void this.persistAttachmentMeta(attachment);
+
+    return true;
+  }
+
   async ensureInlineDisplayObjectUrl(attachment: Attachment): Promise<boolean> {
     if (!needsBlobObjectUrlForInlineDisplay(attachment.objectUrl)) {
       return true;