[Audit] Stream-creation wizard can be closed mid-transaction

[K1NGD4VID]

Filed from the second-wave repository audit (issue 24/100). See the audit summary for full category context.

• Location: frontend/src/components/stream-creation/StreamCreationWizard.tsx:122, 630-632
• Problem: Unlike TopUpModal/CancelConfirmModal (which pass isCloseDisabled: isSubmitting to useModalDialog), the wizard's useModalDialog({ onClose }) has no submission guard, and its footer "Cancel" button is never disabled during isSubmitting/isPolling. A user can dismiss the modal while a stream-creation transaction is in flight.
• Evidence: No isCloseDisabled argument passed; Cancel button has no disabled={isSubmitting}.
• Suggested implementation: Pass isCloseDisabled: isSubmitting || isPolling to useModalDialog and disable the Cancel button under the same condition, matching the sibling modals.
• Acceptance criteria: Escape/backdrop-click/Cancel are all no-ops while a submission is in flight, verified by a component test.
• Difficulty: S
• Expected impact: Prevents users from abandoning the UI mid-transaction and losing track of a pending stream creation.

[Peolite001]

@Peolite001 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

i would love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Peolite001 to this issue.

[d1a-m3n]

@d1a-m3n has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

pls assign me to this task, i can work on it

ℹ️ Repo Maintainers: To accept this application, review their application or assign @d1a-m3n to this issue.

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Congratulations, @Peolite001! 🎉 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!

@Peolite001's PR #1355 was approved and merged by @K1NGD4VID.

🏆 @Peolite001: You earned 40 FoxPoints for this contribution! Your current tier: Builder (2,240 total points). Track your full progress on GrantFox.

👏 Great work, @Peolite001! Keep contributing to LabsCrypt.

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This issue has been completed by @Peolite001 as part of the Stellar Wave Program's 8th Wave 🥳

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