fix(lint): remove unused imports and reformat with black

app/core/calculations.py

@@ -7,7 +7,6 @@ from app.core.pricing.black_scholes import (
     DEFAULT_RISK_FREE_RATE,
     DEFAULT_VOLATILITY,
     BlackScholesInputs,
-    OptionType,
     black_scholes_price_and_greeks,
 )
 from app.models.option import OptionContract

app/domain/portfolio_math.py

@@ -412,11 +412,14 @@ def strategy_metrics_from_snapshot(
     ]
 
     scenario_price = spot * _pct_factor(scenario_pct)
-    scenario_gold_value = _as_money(gold_weight * PricePerWeight(
+    scenario_gold_value = _as_money(
+        gold_weight
+        * PricePerWeight(
             amount=scenario_price,
             currency=BaseCurrency.USD,
             per_unit=WeightUnit.OUNCE_TROY,
-    ))
+        )
+    )
     current_gold_value = _as_money(gold_weight * current_spot)
     unhedged_equity = scenario_gold_value - loan_amount
     scenario_payoff_per_unit = _strategy_option_payoff_per_unit(strategy, spot, scenario_price)

app/domain/units.py

@@ -260,16 +260,24 @@ class PricePerWeight:
             adjusted_weight = other.to_unit(self._per_unit_typed)
             return Money(amount=adjusted_weight.amount * self.amount, currency=self._currency_typed)
         if isinstance(other, Decimal):
-            return PricePerWeight(amount=self.amount * other, currency=self._currency_typed, per_unit=self._per_unit_typed)
+            return PricePerWeight(
+                amount=self.amount * other, currency=self._currency_typed, per_unit=self._per_unit_typed
+            )
         if isinstance(other, int):
-            return PricePerWeight(amount=self.amount * Decimal(other), currency=self._currency_typed, per_unit=self._per_unit_typed)
+            return PricePerWeight(
+                amount=self.amount * Decimal(other), currency=self._currency_typed, per_unit=self._per_unit_typed
+            )
         return NotImplemented
 
     def __rmul__(self, other: object) -> PricePerWeight:
         if isinstance(other, bool):
             return NotImplemented
         if isinstance(other, Decimal):
-            return PricePerWeight(amount=self.amount * other, currency=self._currency_typed, per_unit=self._per_unit_typed)
+            return PricePerWeight(
+                amount=self.amount * other, currency=self._currency_typed, per_unit=self._per_unit_typed
+            )
         if isinstance(other, int):
-            return PricePerWeight(amount=self.amount * Decimal(other), currency=self._currency_typed, per_unit=self._per_unit_typed)
+            return PricePerWeight(
+                amount=self.amount * Decimal(other), currency=self._currency_typed, per_unit=self._per_unit_typed
+            )
         return NotImplemented

app/services/backtesting/ui_service.py

@@ -17,7 +17,6 @@ from app.models.backtest import (
 from app.services.backtesting.databento_source import DatabentoHistoricalPriceSource, DatabentoSourceConfig
 from app.services.backtesting.fixture_source import (
     FixtureBoundSyntheticHistoricalProvider,
-    SharedHistoricalFixtureSource,
     build_backtest_ui_fixture_source,
 )
 from app.services.backtesting.historical_provider import (

app/services/position_costs.py

@@ -86,8 +86,7 @@ def calculate_true_pnl(
 
 
 def get_default_premium_for_product(
-    underlying: str,
+    underlying: str, product_type: str = "default"
-    product_type: str = "default"
 ) -> tuple[Decimal | None, Decimal | None]:
     """Get default premium/spread for common gold products.
 

tests/test_page_validation.py

@@ -1,4 +1,5 @@
 """Tests for page validation functions and constants."""
+
 from __future__ import annotations
 
 from datetime import date, timedelta