docs: update HISTORY, FUTURE, DEVELOPMENT_LOG for v0.22.0

DEVELOPMENT_LOG.md

@@ -6,6 +6,38 @@
 
 ---
 
+### v0.22.0 — React Query Migration
+**Status:** ✅ COMPLETED  
+**Date:** 2026-05-10  
+**Priority:** MEDIUM
+
+| Agent | Status | Time | Notes |
+|-------|--------|------|-------|
+| Neo | ❌ FAILED | 2s | Rate-limited, partial work only (installed deps, started TrackerPage migration) |
+| Ripley | ✅ COMPLETED | — | Completed React Query migration, fixed error handling, version bump |
+| Bishop | ✅ COMPLETED | 2m57s | 8/8 PASS |
+| Hudson | ✅ COMPLETED | 26s | 4/5 PASS (1 FAIL fixed: error handling toast duplication) |
+
+**Files modified:** `client/App.jsx`, `client/hooks/useQueries.js` (new), `client/pages/TrackerPage.jsx`, `package.json`, `package-lock.json`
+
+**Work Completed:**
+- [x] Installed @tanstack/react-query + @tanstack/react-query-devtools
+- [x] Created custom hooks: useTracker, useBills, useCategories
+- [x] Migrated TrackerPage from useState/useEffect to useTracker() hook
+- [x] Added QueryClientProvider with sensible defaults
+- [x] Added ReactQueryDevtools for development
+- [x] Fixed load→refetch callback references
+- [x] Fixed error handling: useRef pattern prevents duplicate toasts
+
+**Security Audit (Hudson):**
+1. Query key injection: ✅ PASS — safe numeric params
+2. DevTools exposure: ✅ PASS — only API data, dev-only
+3. Refetch callback safety: ✅ PASS — no uncontrolled loops
+4. Error handling: ❌ FAIL → ✅ FIXED — useRef pattern prevents duplicate toasts
+5. Cache configuration: ⚠️ INFO — long cache acceptable for UX
+
+---
+
 ### v0.21.0 — 3-Month Trend Indicator
 **Status:** 🔄 IN PROGRESS  
 **Date:** 2026-05-10  

FUTURE.md

@@ -3,7 +3,7 @@
 **This document tracks potential future enhancements for Bill Tracker.**
 
 **Last Updated:** 2026-05-10  
-**Current Version:** v0.21.1
+**Current Version:** v0.22.0
 
 ## How to Use This Document
 
@@ -39,29 +39,6 @@ Items are grouped under their priority section heading (`## 🔴 CRITICAL`, `##
 
 ### 🟡 MEDIUM
 
-### Add React Query (TanStack Query) for server state management
-**Priority:** MEDIUM  
-**Added:** 2026-05-08 by Scarlett
-
-**Description:**
-Currently using manual `useState`/`useEffect` patterns with custom `api` wrapper for data fetching. This leads to duplicated loading/error handling, stale data issues, and no request caching.
-
-**Rationale:**
-Developer experience and performance. React Query provides:
-- Automatic request caching and stale-while-revalidate
-- Background refetching
-- Optimistic updates
-- Request deduplication
-- Built-in loading/error states
-
-**Implementation Notes:**
-- Replace manual API calls in pages with `useQuery`, `useMutation`
-- Add query keys for cache invalidation
-- Implement global query client with React Query DevTools
-- Gradual migration: start with TrackerPage, then BillsPage, then AnalyticsPage
-- Files likely to be modified: `client/pages/*.jsx`, add `client/hooks/useQueryClient.js`
-- Estimated effort: 4-6 hours for full migration
-
 ### Architecture: Business Logic Mixed with Route Handlers
 **Priority:** MEDIUM  
 **Added:** 2026-05-08 by Neo

HISTORY.md

@@ -1,5 +1,18 @@
 # Bill Tracker — Changelog
 
+## v0.22.0
+
+### Added
+- **React Query Migration** — TrackerPage now uses TanStack Query (useQuery) for data fetching with caching, stale-while-revalidate, and auto-refetch
+- **Custom Query Hooks** — `useTracker()`, `useBills()`, `useCategories()` in `client/hooks/useQueries.js`
+- **Query DevTools** — React Query DevTools available in development mode
+- **QueryClientProvider** — Global config with 2min staleTime, 1 retry, refetchOnWindowFocus disabled
+
+### Changed
+- TrackerPage: replaced manual `useState`/`useEffect` with `useTracker()` hook
+- `load()` callback replaced by `refetch()` from React Query
+- Error handling: `useEffect` + `useRef` pattern prevents duplicate toast notifications
+
 ## v0.21.1
 
 ### Added