docs(phase-5): evolve PROJECT.md after phase completion

.planning/PROJECT.md

@@ -45,13 +45,15 @@ desktop for read-only awareness.
   fallback, detail page header reskinned. Backed by `/api/mobile/tickets` with
   cursor pagination + exported `MobileTicket` / `MobileTicketListResponse` types.
   Validated in Phase 4: Tickets Restyle (TICK-01..07)
+- ✓ Finance restyle — `/mobile/finance` adopts new Card + typography scale, KPI
+  2×2 grid, 3-cell aging row, Collapsible invoice/payment lists with FinanceRow,
+  stacked Top Customers + monthly revenue (no chart). API/data shape unchanged.
+  Validated in Phase 5: Finance Restyle (FIN-01..02)
 
 ### Active
 
 <!-- Hypotheses for this milestone — see docs/superpowers/specs/2026-05-03-mobile-shell-design.md -->
 
-- [ ] Finance restyle — adopt new Card + typography scale, swap wide tables for
-      stacked lists on mobile
 - [ ] Analyzer feed (NEW) — `/mobile/analyzer` read-only stream of recent AI
       analyses with mobile summary view; new `/api/mobile/analyzer/feed`
 - [ ] Engagement mobile (NEW) — `/mobile/engagement` overview (period chips,
@@ -140,4 +142,4 @@ This document evolves at phase transitions and milestone boundaries.
 4. Update Context with current state
 
 ---
-*Last updated: 2026-05-03 — Phase 4 complete (Tickets Restyle)*
+*Last updated: 2026-05-03 — Phase 5 complete (Finance Restyle)*