- Add unit tests for FeatureListingHandler (6 tests) and ActivateFeaturedListingHandler (6 tests) - Add unit tests for NeighborhoodScoreServiceImpl (5 tests) and GetNeighborhoodScoreHandler (2 tests) - Add PriceHistoryChart component with recharts LineChart for listing detail page - Wire up price history API client and integrate chart into listing detail view Co-Authored-By: Paperclip <noreply@paperclip.ing>