Duplicate toasts appear when events fire in rapid succession

[Kingsman-99]

Description

When multiple identical events occur within milliseconds (e.g. a webhook fires twice), ToastContainer renders duplicate toast entries. The component should deduplicate toasts with the same message and type that arrive within a short debounce window.

Acceptance Criteria

• Identical toasts (same message + type) fired within 500 ms are collapsed into a single toast
• Subsequent duplicates reset the auto-dismiss timer of the existing toast
• Non-identical toasts are never suppressed
• Existing tests continue to pass

Context

• Target file: src/components/ToastContainer.tsx

[adelekevictor12]

@adelekevictor12 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, i can fix this issue

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[okontemple96-dotcom]

@okontemple96-dotcom has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, can i work on this issue?

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Congratulations, @okontemple96-dotcom! 🎉 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!

@okontemple96-dotcom's PR #643 was approved and merged by @Kingsman-99.

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This issue has been completed by @okontemple96-dotcom as part of the Stellar Wave Program's 8th Wave 🥳

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