fix: Bug - Sending files and attachment issues (gallery load and speed)

Route small images through in-memory receive instead of serialized disk
chunk-acks, and improve gallery hydration for local copies and pending
downloads so thumbnails display without minutes-long progress stalls.

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

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

@@ -17,6 +17,7 @@ import {
   shouldPersistDownloadedAttachment,
   shouldStreamAttachmentReceiveToDisk
 } from '../../domain/logic/attachment.logic';
+import { shouldServeAttachmentFromDiskPath } from '../../domain/logic/attachment-serve.rules';
 import type { Attachment, AttachmentMeta } from '../../domain/models/attachment.model';
 import {
   ATTACHMENT_TRANSFER_EWMA_CURRENT_WEIGHT,
@@ -564,7 +565,7 @@ export class AttachmentTransferService {
       ? await this.attachmentStorage.resolveExistingPath(attachment)
       : null;
 
-    if (diskPath) {
+    if (diskPath && shouldServeAttachmentFromDiskPath(await this.attachmentStorage.getFileSize(diskPath))) {
       await this.transport.streamFileFromDiskToPeer(
         fromPeerId,
         messageId,
@@ -598,7 +599,7 @@ export class AttachmentTransferService {
         roomName
       );
 
-      if (legacyDiskPath) {
+      if (legacyDiskPath && shouldServeAttachmentFromDiskPath(await this.attachmentStorage.getFileSize(legacyDiskPath))) {
         await this.transport.streamFileFromDiskToPeer(
           fromPeerId,
           messageId,