evan-moon/firma

What's changed

Multi-currency support

• USD is now the canonical ledger currency. add balance / add flow prompt for input currency (USD, KRW, EUR, JPY, CNY, GBP), fetch live FX, and convert to USD before write — the spot rate is shown when input is non-USD
• Interactive currency picker on display. show portfolio / show balance / show flow / show dividend / show snapshot all prompt for display currency when --currency is omitted; --currency flag and --json mode preserved for scripting/LLM use
• show txns renders each transaction in its stored currency — KRW transactions show ₩, USD show $ (no more incorrect $128,300)
• show balance [period] / show flow [period] accept positional period args; fall back to most recent period with data when current month is empty

MCP parity

• add_monthly — batch upsert balance + flow entries for a single period in one call
• report_combined — balance + flow trends in one call

Internals

• Extracted pure utilities (currency formatting, period helpers, prompt helpers, render) from commands/ into utils/
• Dropped unused exports, dead helpers, and the providers/prices.ts no-op wrapper
• Removed firma migrate — was a one-shot KRW→USD migration that's no longer reachable since new entries are always written as USD

Upgrade

```bash
npm install -g firma-app@latest
```