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-manager.service.ts

@@ -4,7 +4,10 @@ import {
   inject
 } from '@angular/core';
 import { NavigationEnd, Router } from '@angular/router';
+import { Store } from '@ngrx/store';
+import { take } from 'rxjs';
 import { RealtimeSessionFacade } from '../../../../core/realtime';
+import { selectCurrentUserId } from '../../../../store/users/users.selectors';
 import { DatabaseService } from '../../../../infrastructure/persistence';
 import { yieldToAttachmentHydrationLoop } from '../../domain/logic/attachment-blob.rules';
 import {
@@ -32,6 +35,7 @@ export class AttachmentManagerService {
 
   private readonly webrtc = inject(RealtimeSessionFacade);
   private readonly router = inject(Router);
+  private readonly store = inject(Store);
   private readonly database = inject(DatabaseService);
   private readonly runtimeStore = inject(AttachmentRuntimeStore);
   private readonly persistence = inject(AttachmentPersistenceService);
@@ -45,9 +49,10 @@ export class AttachmentManagerService {
     effect(() => {
       if (this.database.isReady() && !this.isDatabaseInitialised) {
         this.isDatabaseInitialised = true;
-        void this.persistence.initFromDatabase().then(() => {
+        void this.persistence.initFromDatabase().then(async () => {
           if (this.watchedRoomId) {
-            void this.restoreLocalAttachmentsForRoom(this.watchedRoomId);
+            await this.restoreLocalAttachmentsForRoom(this.watchedRoomId);
+            await this.announceHostedAttachments();
           }
         });
       }
@@ -68,7 +73,10 @@ export class AttachmentManagerService {
 
     this.webrtc.onPeerConnected.subscribe(() => {
       if (this.watchedRoomId) {
-        void this.restoreLocalAttachmentsForRoom(this.watchedRoomId);
+        void this.restoreLocalAttachmentsForRoom(this.watchedRoomId).then(async () => {
+          await this.announceHostedAttachments();
+        });
+
         void this.requestAutoDownloadsForRoom(this.watchedRoomId);
       }
     });
@@ -324,6 +332,15 @@ export class AttachmentManagerService {
     return getWatchedAttachmentRoomIdFromUrl(url);
   }
 
+  private async announceHostedAttachments(): Promise<void> {
+    const currentUserId = await new Promise<string | null>((resolve) => {
+      this.store.select(selectCurrentUserId).pipe(take(1))
+        .subscribe((userId) => resolve(userId));
+    });
+
+    await this.transfer.reannounceHostedAttachments(currentUserId);
+  }
+
   private isRoomWatched(roomId: string | null | undefined): boolean {
     return !!roomId && roomId === this.watchedRoomId;
   }