Fix analytics page stat cards flashing 0 during initial load

[Austinaminu2]

Description

`app/app/analytics/page.tsx:158` calls `useStreams({ enablePolling: false })`, which exposes a `loading` flag, but the page never destructures/consumes it — so the four top stat cards render misleading "0" values before real data resolves, instead of a loading state.

Location

`app/app/analytics/page.tsx:158`

Task

Destructure the `loading` flag from `useStreams()` and use it to render a loading skeleton/placeholder for the stat cards instead of flashing zero values.

Good for contributors because

Small, isolated fix — the loading flag already exists on the hook, it's just not being used.

[DeFex-lab]

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[Emmycivity]

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[Kingsman-99]

@Kingsman-99 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

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Congratulations, @Kingsman-99! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@Kingsman-99's PR #705 was approved and merged by @Austinaminu2.

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👏 Great work, @Kingsman-99! Keep contributing to FlowwStar.

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This issue has been completed by @Kingsman-99 as part of the Stellar Wave Program's 8th Wave 🥳

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