feat:Multi-Issue Frontend & Contract Improvements

[Samuel1505]

Pull Request: Multi-Issue Frontend & Contract Improvements

This PR addresses four distinct issues across the frontend and smart contract layers, improving transparency, user engagement, and measurement accuracy.

closes #534
closes #537
closes #580
closes #557

Resolved Issues

1. Issue 534: Full-payment Reward Breakdown and Receipt Transparency

• Implemented: A new PayoutBreakdown component that transparently displays platform and reporter shares.
• Improved: Integrated next-intl for full i18n support in the payment flow.
• Fixed: Resolved rounding drift in NGN currency formatting by ensuring 2 decimal places.
• UX: Added pre-confirmation preview and immutable post-payment receipt states.

2. Issue 537: Apartment Review Section with Filterable User Feedback

• Implemented: A comprehensive review section on the property detail page.
• Features:
  • Filtering by rating (1-5 stars).
  • Sorting by newest, highest, and lowest ratings.
  • "Verified Stay" toggle to filter reviews from actual tenants.
• URL State: Integrated with next-navigation to preserve filter state in the URL.
• States: Included loading, empty, and error states with appropriate UX.

3. Issue 580: Connect Whistleblower Dashboard to Live Stats, Listings, and Earnings

• API Integration: Created a new whistleblowerDashboard API client.
• Dashboard Update: Switched the dashboard from static mock data to live API fetching.
• Error Handling: Implemented robust loading states and a dedicated connection error view for better resilience.

4. Issue 557: Contracts: Meaningful Migration Benchmark Metrics

• Enhanced Metrics: Replaced placeholder counters in the migration test framework with actual measurements.
• New Metrics: Now reporting CPU instructions, memory usage, and storage read/write bytes.
• Infrastructure: Updated MigrationRunner and MigrationTestFramework to capture and report Soroban-specific resource consumption.

Verification

• CI pipeline commands (lint, build, test) executed locally.
• Component tests for PayoutBreakdown updated and verified.
• Manual verification of review filters and dashboard loading states.

Commit History

• feat(frontend): Issue 534 - Full-payment reward breakdown and receipt transparency
• feat(frontend): Issue 537 - Apartment review section with filterable user feedback
• feat(frontend): Issue 580 - Connect whistleblower dashboard to live stats, listings, and earnings data
• feat(contracts): Issue 557 - Replace placeholder migration benchmark metrics with meaningful measurements

The PR description must not be empty.

• The PR description must include these headings (exact text):

  • Summary

  • Changes

  • Checklist

• Link an issue in the PR description (example: Closes metadata_hash canonical payload hashing spec #123).

• Network

• New Contract

• Upgrade Governance

• Verification Steps

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