Add Portfolio Value panel to Wallet dashboard

[christabel888]

Context: First Wallet Dashboard panel, backed by backend Stellar-Insightss/backend#25.

Where:

• frontend/src/app/[locale]/wallet/[address]/

What to do:

• Add a portfolio-value stat panel.

Definition of done:

• Wallet dashboard shows portfolio value for a given address

[daniel6yi8-gif]

Review the current project structure and compare it with the existing application. Identify any missing or outdated sections in the documentation. Kindly assign

[grantfox-oss]

🦊 GrantFox — @daniel6yi8-gif has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #171)
2. Your PR will be reviewed by the Stellar-Insightss maintainers

Good luck! Track your progress on GrantFox.