computeDailyTarget now requires equityProfit (amount - accountSize) and
returns null when it's undefined/null/NaN. 0 is still a valid value.
- Removed totalProfit parameter (was only used as fallback)
- Callers handle null by skipping the account (eligibility) or throwing
(execution paths)
- State API sets dailyTarget to null when no valid balance, avoids
incorrect targetHit computation
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>