Enhancement: Implement fiat value display in Activity tab for Solana Network to align with EVM

### What is this about?

Fiat value display is implemented for EVM chains like Ethereum and Linea — I see fiat value per transaction in the activity tab there, but not for Solana. Price data exists, since fiat value is available for SOL in Wallet overview, Tokens tab, as well as Transaction flows. Seems like incomplete implementation.

### Scenario

Given I am in the Activity Tab
When I check the transactions list
Then the fiat value is displayed for SOL tokens

### Design

Example of fiat value display in Tokens tab/Wallet Overview:

Current design for Activity tab, without fiat value displayed:

Current design for EVM networks, with fiat value displayed:

### Technical Details

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### Threat Modeling Framework

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### Acceptance Criteria

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### Stakeholder review needed before the work gets merged

- [x] Engineering (needed in most cases)
- [x] Design
- [x] Product
- [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
- [ ] Security
- [ ] Legal
- [ ] Marketing
- [ ] Management (please specify)
- [ ] Other (please specify)

### References

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