feat(EXEC-001): add hedge strategy builder

app/pages/common.py

@@ -110,14 +110,15 @@ def option_chain() -> list[dict[str, Any]]:
 
 
 def strategy_metrics(
-    strategy_name: str,
+    strategy_key: str,
     scenario_pct: int,
     *,
     portfolio: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
+    catalog = strategy_catalog()
     strategy = next(
-        (item for item in strategy_catalog() if item["name"] == strategy_name),
-        strategy_catalog()[0],
+        (item for item in catalog if item.get("template_slug") == strategy_key or item.get("name") == strategy_key),
+        catalog[0],
     )
     portfolio = portfolio or portfolio_snapshot()
     return strategy_metrics_from_snapshot(strategy, scenario_pct, portfolio)