Add per-stage withdrawal targets with consistency and min trading days

- Add withdrawal stage system: each stage defines profit target, consistency,
  and min trading days for post-withdrawal challenge cycles
- Target Same Equity mode accounts for withdrawn amounts when computing
  effective profit target (profitTarget - remainingProfit)
- Store fund transaction timestamps for time-aware cycle filtering
  (withdrawals before 9 AM CT include that day in new cycle)
- Expose full P&L history (fullDailyPnL) for calendar/equity curve display
  across all cycles, with DB fallback for pre-restart data
- Show stage number (#1, #2, etc.) on calendar cells
- Hide consistency reference line when consistency is 0% or 100%
- Settings UI: "After First W/D" column with same-equity checkbox,
  expandable stage sub-rows with profit/consistency/days inputs
- Default target_same_equity to 1 for new and existing account configs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/api/firms/[id]/route.ts

@@ -33,6 +33,8 @@ export async function GET(
             accountSize: a.account_size,
             maxLoss: a.max_loss,
             maxPositionSize: a.max_position_size,
+            targetSameEquity: a.target_same_equity === 1,
+            withdrawalStages: (() => { try { return JSON.parse(a.withdrawal_stages ?? '[]') as { profit: number; consistency: number; minTradingDays: number }[]; } catch { return []; } })(),
         })),
     });
 }