Delivered Button is not working Restaurant Application

**Describe the bug**
The "Delivered" button is not working in the Restaurant Application.

**To Reproduce**

1. Open the Restaurant Application.
2. Navigate to 'Processing' order tab.
3. Click the "Delivered" button.

**Observed Behavior:**
The button does not perform any action, and the order remains in the "Processing" or "Active" state.

**Expected Behavior:**
When the "Delivered" button is clicked:

1. The order should stop processing.
2. The order should be moved to the "Delivered" tab, indicating it is complete.

**Proposed Solution:**

1. Implement a trigger/action linked to the "Delivered" button that updates the order status to "Delivered."
2. Ensure the order is removed from the "Active" or "Processing" tab and displayed under the "Delivered" tab.
3. Provide visual confirmation or a success message to the user after the action is completed.

**Smartphone**

- Device: iPhone13promax
- OS: iOS18.1

No files or tests are named. Start by locating the Delivered button and the order-status and tab-handling entry points, then reproduce the issue from the Processing tab. Done means the order changes to Delivered, disappears from Active or Processing, appears in Delivered, and provides the expected confirmation.

Written by the indexing model from the issue text.