Board: per-day trade history + accurate day P&L; manual symbol weights

- momentum watch: replace 'open positions' with TODAY'S trade history (FIFO
  round-trips from the broker orders snapshot: time/symbol/qty/entry/exit/P&L +
  open lots), resets each day. Headline day P&L is broker-accurate (equity -
  last_equity, now carried on AccountSummaryUpdatedEvent), shown in the header
  and the panel title. sync_orders limit 50->500 so the log captures the whole
  day across restarts.
- SYMBOL_WEIGHTS: optional manual per-symbol priority nudge applied to the
  armed-trigger rank score (small; doesn't override gap/volume logic).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

storage/event_schema.py

@@ -232,6 +232,9 @@ class AccountSummaryUpdatedEvent(BaseEvent):
     cash_balance: float = Field(description="Available cash balance")
     buying_power: float = Field(description="Buying power")
     net_liquidating_value: float = Field(description="Net liquidation value")
+    last_equity: float = Field(
+        default=0.0, description="Prior-session close equity (day P&L baseline)"
+    )
 
 
 class AccountPositionsUpdatedEvent(BaseEvent):