fix: display flat for RHF peer-review bounty notifications

[jeevan6996]

Summary

Adjusts bounty notification display so RHF-sponsored peer review bounty prompts show a flat $150 USD amount instead of derived variable amounts.

Closes ResearchHub/issues#342

Changes

• add a notification-level USD override for peer-review bounty prompts (BOUNTY_FOR_YOU + REVIEW)
• use the flat amount from FOUNDATION_BOUNTY_FLAT_USD
• apply the same override in the notification amount badge so message and badge stay consistent

Files

• components/Notification/lib/formatNotification.ts
• components/Notification/NotificationItem.tsx

Testing

• attempted to run frontend checks locally, but Node is currently broken in this environment due a missing dynamic library (libsimdjson.31.dylib), so CI validation is required.

---

Note

Low Risk
Small, UI-only formatting change scoped to a single notification type; risk is limited to incorrect amount/currency display for affected notifications.

Overview
Updates BOUNTY_FOR_YOU notifications with bounty_type=REVIEW to display a fixed FOUNDATION_BOUNTY_FLAT_USD amount instead of deriving USD from the RSC amount/exchange rate.

Adds getBountyForYouUsdOverride in formatNotification.ts and applies it both to the notification message text and the CurrencyBadge in NotificationItem (forcing USD + skipping conversion) so the badge and message remain consistent.

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[jeevan6996]

Implemented the Cursor feedback and pushed an update to keep bounty messaging consistent: is now applied regardless of , so the badge/value no longer diverges from the notification message in peer-review bounty cases.

[jeevan6996]

Correction: implemented the Cursor feedback and pushed an update to keep bounty messaging consistent. The bountyUsdOverride value is now applied regardless of showUSD, so the badge/value no longer diverges from the notification message in peer-review bounty cases.

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[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[jeevan6996]

Quick follow-up: Sonar checks are green; the remaining blocker is Vercel authorization for this repo/team integration. If a team member can authorize the deployment integration, this PR should be unblocked for normal review.