Explain when Smart Wallet actions are final vs still in progress

## Problem Description

When using Smart Wallet, it’s not always obvious when an action is fully finished versus still processing in the background. A simple explanation would help developers handle UI and user feedback more confidently.
Developers may not know when it’s safe to move on to the next step after triggering a Smart Wallet action. This can lead to confusing loading states or users clicking actions multiple times.

## Proposed Solution
Add a short, plain-language section that explains how to tell when a Smart Wallet action is complete versus still in progress, with simple examples developers can relate to.

Review the existing Smart Wallet documentation to identify where guidance on action status belongs. Done means adding a short, plain-language explanation with simple examples that distinguishes completed actions from those still processing and clarifies when developers can proceed.

Written by the indexing model from the issue text.