Outage detail page polls even after component unmount

[usmanimamu17-create]

The outage detail page (src/app/outages/[id]/page.tsx) implements a 15-second polling interval to fetch updates while the outage status is "open". The cleanup function only calls controller.abort() and clearInterval(). If the user navigates away before the interval fires, the in-flight getOutage request may resolve after unmount, attempting to call setOutage(data) on an unmounted component.

Root cause: Lines 118-134 in src/app/outages/[id]/page.tsx - setOutage called after unmount if navigation occurs mid-request.

Why this is architecturally hard

1. AbortController aborts the request but promise may still resolve
2. The mountedRef pattern used in SessionProvider is not applied here
3. React 19 concurrent features may re-render after effects cleaned up

Acceptance criteria

• Navigating away while poll request in-flight does not trigger state update on unmounted component
• No React warnings about state updates on unmounted components
• Test verifies cleanup

Getting started

Files: src/app/outages/[id]/page.tsx

[irefavor15-dotcom]

Hi Maintainer
May I fix this issue

[grantfox-oss]

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Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #264)
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[grantfox-oss]

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

@irefavor15-dotcom's PR #281 was approved and merged by @usmanimamu17-create.

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