Added a placeholder if wallet not connected

[melnikga]

[FEAT] Add a placeholder if wallet not connected #368

Fixes #368

Types of change

• The text "You haven't connected your wallet yet" has been added to the skeleton component, and the logic of displaying the skeleton has also been changed
• Mobile version

Comments (optional)

[melnikga]

The mobile version is not ready yet, I will finish it in the next commit soon

[melnikga]

Let me know if you are satisfied with this solution to the problem. In that case, I'll finish the mobile version and we can merge

[Nadai2010]

Hi @melnikga, please check that all CI tests are green, yarn format:check should correct the correct format.

We will check the placeholder changes and let you know.

[Nadai2010]

I believe the idea is to avoid having it stuck in a loading state, acting as if it’s "loading."

We just need it to display something short, like "Wallet not connected" or simila

• No gray background and definitely no "Connect" button.