Prevent forwarding a file to its original owner

[girishjadhav-cosmica]

Description:
The system currently allows users to forward a file back to its original owner. This behavior is unnecessary and can lead to confusion or redundant file duplication. The application should restrict forwarding a file to the user who originally uploaded or sent it.

Steps to Reproduce:

1. User A uploads or sends a file.
2. User B receives the file.
3. User B attempts to forward the file back to User A.
4. Observe that the system allows the action.

Expected Behavior:
The system should block forwarding a file to its original owner and display a clear message indicating that the action is not allowed.

Actual Behavior:
The system allows forwarding the file to its original owner without any restriction.

Suggested Behavior / Fix:

• Add a validation check to detect if the recipient is the original file owner.
• If true, prevent the action and show a user-friendly message such as:
  "This file cannot be forwarded to its original owner."