good first issue: use actual token decimals instead of hardcoded 7 in analytics charts

[Austinaminu2]

Description

`components/analytics/charts.tsx:67,87` hardcodes `formatTokenAmount(token.amount, 7)` instead of using the token's actual decimals. The `TokenShare` type doesn't even carry a `decimals` field, so any custom token with a decimals value other than 7 (XLM's decimals) displays the wrong amount in the analytics chart.

Location

`components/analytics/charts.tsx:67, 87`

Task

Add a `decimals` field to the `TokenShare` type, populate it from the token metadata where `TokenShare` objects are constructed, and use that value instead of the hardcoded `7` in both chart call sites.

Good for newcomers because

Clear, well-scoped data-correctness bug affecting a specific, easy-to-verify display (chart amounts for non-XLM tokens).

[Young850]

@Young850 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

hello sir can i work on this please

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Congratulations, @Young850! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Young850: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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This issue has been completed by @Young850 as part of the Stellar Wave Program's 7th Wave 🥳

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