fix(portfolio): default new workspaces to 100 oz

tests/test_workspace.py

@@ -254,3 +254,58 @@ def test_hedge_page_upgrades_cached_gld_quote_and_uses_converted_spot(tmp_path,
     assert portfolio["spot_price"] == 4041.9
     assert portfolio["gold_value"] == 889218.0
     assert portfolio["net_equity"] == 667218.0
+
+
+def test_hedge_page_upgrades_legacy_default_workspace_footprint(tmp_path, monkeypatch) -> None:
+    import asyncio
+
+    from app.pages import hedge as hedge_module
+    from app.services import runtime as runtime_module
+
+    _install_workspace_repo(tmp_path, monkeypatch)
+    workspace_id = str(uuid4())
+    workspace_path = tmp_path / "workspaces" / workspace_id
+    workspace_path.mkdir(parents=True, exist_ok=True)
+    (workspace_path / "portfolio_config.json").write_text(
+        json.dumps(
+            {
+                "schema_version": 2,
+                "portfolio": {
+                    "gold_value": {"value": "215000.0", "currency": "USD"},
+                    "entry_price": {"value": "215.0", "currency": "USD", "per_weight_unit": "ozt"},
+                    "gold_ounces": {"value": "1000.0", "unit": "ozt"},
+                    "entry_basis_mode": "value_price",
+                    "loan_amount": {"value": "145000.0", "currency": "USD"},
+                    "margin_threshold": {"value": "0.75", "unit": "ratio"},
+                    "monthly_budget": {"value": "8000.0", "currency": "USD"},
+                    "ltv_warning": {"value": "0.70", "unit": "ratio"},
+                    "primary_source": "yfinance",
+                    "fallback_source": "yfinance",
+                    "refresh_interval": {"value": 5, "unit": "seconds"},
+                    "volatility_spike": {"value": "0.25", "unit": "ratio"},
+                    "spot_drawdown": {"value": "7.5", "unit": "percent"},
+                    "email_alerts": False,
+                },
+            }
+        )
+    )
+
+    class _CacheStub:
+        async def get_json(self, key: str):  # type: ignore[override]
+            if key == "quote:GLD":
+                return {"symbol": "GLD", "price": 404.19, "quote_unit": "share", "source": "cache"}
+            return None
+
+        async def set_json(self, key: str, value):  # type: ignore[override]
+            return True
+
+    data_service = DataService(cache=_CacheStub())  # type: ignore[arg-type]
+    monkeypatch.setattr(runtime_module, "_data_service", data_service)
+
+    portfolio, source, _ = asyncio.run(hedge_module._resolve_hedge_spot(workspace_id))
+
+    assert source == "cache"
+    assert portfolio["gold_units"] == 100.0
+    assert portfolio["margin_call_price"] == 1933.3333333333333
+    assert portfolio["gold_value"] == 404190.0
+    assert portfolio["net_equity"] == 259190.0