Record daily snapshot in cmd_evening for monitor NAV tracking

cmd_evening (used by the monitor path) only updated the simple daily_equity
dict, so daily_log had gaps on every monitor-driven day. Mirror cmd_auto's
pattern and call record_daily_snapshot so each strategy's NAV is recorded
every trading day, even when no trades execute.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

trader.py

@@ -520,6 +520,12 @@ def cmd_evening(args):
 
     post_value = portfolio_value(state["holdings"], close_prices, state["cash"])
     state["daily_equity"][trade_date] = round(post_value, 2)
+
+    # Record daily snapshot so daily_log stays complete even on no-trade days
+    eq_vals = list(state["daily_equity"].values())
+    prev_eq = eq_vals[-2] if len(eq_vals) >= 2 else state["initial_capital"]
+    record_daily_snapshot(state, trade_date, close_prices, exec_trades, prev_eq)
+
     state["pending_trades"] = None
     state["last_evening"] = trade_date
     save_state(state, market, strategy_name)