Refine Dashboard Sidebar Active State

BUILD_FIX_SUMMARY.md

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+# Build & Lint Fix Summary
+
+## ✅ All Issues Resolved
+
+**Status:**
+
+- ✅ Build: Successful (0 errors)
+- ✅ Lint: Passing (0 errors, 2 informational warnings)
+- ✅ Formatting: All files formatted correctly
+
+## Issues Fixed
+
+### 1. TypeScript Type Errors in Recharts Tooltips
+
+**Files:** `RevenueSplitDashboard.tsx`, `PayrollAnalytics.tsx`
+
+Changed formatter types to use `readonly` arrays:
+
+```typescript
+// Before
+(value: number | string | (number | string)[] | undefined)
+
+// After
+(value: number | string | readonly (number | string)[] | undefined)
+```
+
+### 2. ESLint Errors
+
+**File:** `TransactionNotificationExample.tsx`
+
+- Removed unused `error` variable in catch block
+- Fixed promise handling: `onClick={() => void handlePayment()}`
+
+### 3. React Hook Dependencies
+
+**Files:** `usePendingTransactions.ts`, `TransactionPendingOverlay.tsx`
+
+- Fixed useCallback dependency chain
+- Refactored useEffect to avoid stale closures
+
+### 4. Unused Imports
+
+**Files:** `TransactionPendingOverlay.tsx`, `TransactionContext.tsx`
+
+- Removed unused imports and parameters
+
+### 5. Code Formatting
+
+**File:** `AccessibleDatePicker.tsx`
+
+- Fixed prettier formatting issues
+
+## Files Modified
+
+1. `frontend/src/pages/RevenueSplitDashboard.tsx`
+2. `frontend/src/pages/PayrollAnalytics.tsx`
+3. `frontend/src/components/TransactionPendingOverlay.tsx`
+4. `frontend/src/components/AccessibleDatePicker.tsx`
+5. `frontend/src/contexts/TransactionContext.tsx`
+6. `frontend/src/examples/TransactionNotificationExample.tsx`
+7. `frontend/src/hooks/usePendingTransactions.ts`
+
+## Remaining Warnings (Informational Only)
+
+2 fast-refresh warnings in context files - these don't affect functionality.
+
+## Verification
+
+```bash
+npm run build --prefix frontend    # ✅ Success
+npm run lint --prefix frontend     # ✅ Passing
+npx prettier frontend --check      # ✅ All formatted
+```
+
+## CI Pipeline Status
+
+All checks passing:
+
+- ✅ Install dependencies
+- ✅ Lint
+- ✅ Format check
+- ✅ Build