Fix private calls

toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.ts

@@ -278,6 +278,19 @@ export class ChatMessagesComponent {
     const electronApi = this.electronBridge.getApi();
 
     if (electronApi) {
+      const diskPath = this.getAttachmentDiskPath(attachment);
+
+      if (diskPath && electronApi.saveExistingFileAs) {
+        try {
+          const result = await electronApi.saveExistingFileAs(diskPath, attachment.filename);
+
+          if (result.saved || result.cancelled)
+            return;
+        } catch {
+          /* fall back to blob/browser download */
+        }
+      }
+
       const blob = await this.getAttachmentBlob(attachment);
 
       if (blob) {
@@ -326,6 +339,9 @@ export class ChatMessagesComponent {
     if (!attachment.objectUrl)
       return null;
 
+    if (attachment.objectUrl.startsWith('file:'))
+      return null;
+
     try {
       const response = await fetch(attachment.objectUrl);
 
@@ -335,6 +351,10 @@ export class ChatMessagesComponent {
     }
   }
 
+  private getAttachmentDiskPath(attachment: Attachment): string | null {
+    return attachment.savedPath || attachment.filePath || null;
+  }
+
   private blobToBase64(blob: Blob): Promise<string> {
     return new Promise((resolve, reject) => {
       const reader = new FileReader();