Add wallet feature for separate fund tracking

[Claude]

Implements wallet management to track separate funds (bank accounts, cash, work funds) with automatic balance updates when expenses are created, edited, or deleted.

Database Schema

• New wallets table with initial_balance, current_balance, currency
• Added nullable wallet_id foreign key to expenses table
• Migration script: migrations/007_wallets.sql

Backend (Cloudflare Workers + D1)

• API Endpoints: REST CRUD at /api/wallets (GET, POST, PUT, DELETE)
• Wallet Handler: worker/handlers/wallet.handler.ts with Zod validation
• Balance Management: Automatic updates in DBService expense operations:
  • Create: Deduct from wallet
  • Update: Restore old wallet, deduct from new wallet
  • Delete: Restore to wallet
• Types: Added Wallet interface, updated Expense with optional wallet_id

Frontend (React + TypeScript)

• Wallets Page: Full CRUD with balance display (src/pages/WalletsPage.tsx)
• Expense Integration: Optional wallet selector in ExpenseForm showing name, currency, and current balance
• Navigation: Added to header (desktop) and bottom nav (mobile)
• Service Layer: src/lib/wallet-service.ts for API calls

Example Usage

// Create wallet
POST /api/wallets
{
  "name": "Bank Account",
  "initialBalance": 1000,
  "currency": "USD"
}

// Create expense with wallet
POST /api/expenses
{
  "merchant": "Store",
  "total": 50,
  "walletId": "wallet-123",  // Optional
  ...
}
// Wallet balance automatically decreases to 950

Backward Compatibility

Expenses without wallet_id continue to work. Feature is fully optional.

Deployment

npm run db:migrate:007:prod  # Run migration
npm run deploy               # Deploy

Documentation: docs/WALLET_FEATURE.md

[cloudflare-workers-and-pages]

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	focal-expensi	3cb4640	Commit Preview URL Branch Preview URL	Feb 28 2026, 02:01 AM