fix: Swap Infinite loading and error message not shown when user routing setting customized

[memoyil]

To reproduce

Turn off v2 from customize routing Pick a token that doesn't have v3 pool See it infinitely loading without showing message

Before:

After:

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PR-Codex overview

This PR focuses on improving error handling and conditional logic in the trading process, specifically addressing trade errors and route validation in the swap functionality.

Detailed summary

• Updated tradeError assignment to handle undefined cases.
• Modified route fetching to safely access chainId.
• Adjusted modal title rendering in SwapRevampRiskDisplay.
• Enhanced price impact checks in V4Swap to consider tradeError.
• Added handling for NoValidRouteError in SwapCommitButton.
• Wrapped best trade fetching in a try-catch block to manage errors gracefully.

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