[KV Feedback]: optimize kv viewer

### 🔍

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### Type of feedback

Feature request

### Description

I saved some json data in kv, but the current viewer does not display complete data, as follows

So I have to open devtools to copy same data.

### Steps to reproduce (if applicable)

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### Expected behavior (if applicable)

_No response_

### Possible solution (if applicable)

_No response_

### Additional context

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