feat(UX-001): add full-width two-pane dashboard layout

app/pages/backtests.py

@@ -7,7 +7,7 @@ from nicegui import ui
 
 from app.domain.backtesting_math import asset_quantity_from_workspace_config
 from app.models.workspace import get_workspace_repository
-from app.pages.common import dashboard_page, render_workspace_recovery
+from app.pages.common import dashboard_page, split_page_panes
 from app.services.backtesting.ui_service import BacktestPageRunResult, BacktestPageService
 
 
@@ -79,9 +79,14 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
         "backtests",
         workspace_id=workspace_id,
     ):
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
+        left_pane, right_pane = split_page_panes(
+            left_testid="backtests-left-pane",
+            right_testid="backtests-right-pane",
+        )
+
+        with left_pane:
             with ui.card().classes(
-                "w-full max-w-xl rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
                 ui.label("Scenario Form").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
                 ui.label(
@@ -115,6 +120,11 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
                 validation_label = ui.label("").classes("text-sm text-rose-600 dark:text-rose-300")
                 run_button = ui.button("Run backtest").props("color=primary")
 
+            seeded_summary = ui.card().classes(
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+            )
+
+        with right_pane:
             result_panel = ui.column().classes("w-full gap-6")
 
         def parse_iso_date(raw: object, field_name: str) -> date:
@@ -123,16 +133,62 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
             except ValueError as exc:
                 raise ValueError(f"{field_name} must be in YYYY-MM-DD format") from exc
 
+        def render_seeded_summary(*, entry_spot: float | None = None) -> None:
+            seeded_summary.clear()
+            resolved_entry_spot = entry_spot
+            if resolved_entry_spot is None:
+                try:
+                    resolved_entry_spot = service.derive_entry_spot(
+                        str(symbol_input.value or "GLD"),
+                        parse_iso_date(start_input.value, "Start date"),
+                        parse_iso_date(end_input.value, "End date"),
+                    )
+                except (ValueError, KeyError):
+                    resolved_entry_spot = None
+            with seeded_summary:
+                ui.label("Scenario Summary").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                with ui.grid(columns=1).classes("w-full gap-4 sm:grid-cols-2 lg:grid-cols-1 xl:grid-cols-2"):
+                    cards = [
+                        ("Template", select_options.get(str(template_select.value), str(template_select.value or "—"))),
+                        ("Underlying units", f"{float(units_input.value or 0.0):,.0f}"),
+                        ("Loan amount", f"${float(loan_input.value or 0.0):,.0f}"),
+                        ("Margin call LTV", f"{float(ltv_input.value or 0.0):.1%}"),
+                        (
+                            "Date range",
+                            f"{str(start_input.value or '—')} → {str(end_input.value or '—')}",
+                        ),
+                        (
+                            "Entry spot",
+                            f"${resolved_entry_spot:,.2f}" if resolved_entry_spot is not None else "Pending",
+                        ),
+                    ]
+                    for label, value in cards:
+                        with ui.card().classes(
+                            "rounded-xl border border-slate-200 bg-slate-50 p-4 shadow-none dark:border-slate-800 dark:bg-slate-950"
+                        ):
+                            ui.label(label).classes("text-sm text-slate-500 dark:text-slate-400")
+                            ui.label(value).classes("text-xl font-bold text-slate-900 dark:text-slate-100")
+
+        def render_result_validation(message: str) -> None:
+            result_panel.clear()
+            with result_panel:
+                with ui.card().classes(
+                    "w-full rounded-2xl border border-amber-200 bg-amber-50 shadow-sm dark:border-amber-900/60 dark:bg-amber-950/30"
+                ):
+                    ui.label("Scenario Results").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                    ui.label(message).classes("text-sm text-amber-800 dark:text-amber-200")
+
         def render_result(result: BacktestPageRunResult) -> None:
             result_panel.clear()
             template_result = result.run_result.template_results[0]
             summary = template_result.summary_metrics
             entry_spot_hint.set_text(f"Auto-derived entry spot: ${result.entry_spot:,.2f}")
+            render_seeded_summary(entry_spot=result.entry_spot)
             with result_panel:
                 with ui.card().classes(
                     "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
                 ):
-                    ui.label("Scenario Summary").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                    ui.label("Scenario Results").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
                     ui.label(f"Template: {template_result.template_name}").classes(
                         "text-sm text-slate-500 dark:text-slate-400"
                     )
@@ -216,9 +272,11 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
                     parse_iso_date(end_input.value, "End date"),
                 )
             except (ValueError, KeyError):
+                render_seeded_summary(entry_spot=None)
                 return
             units_input.value = asset_quantity_from_workspace_config(config, entry_spot=entry_spot, symbol="GLD")
             entry_spot_hint.set_text(f"Auto-derived entry spot: ${entry_spot:,.2f}")
+            render_seeded_summary(entry_spot=entry_spot)
 
         def run_backtest() -> None:
             validation_label.set_text("")
@@ -233,17 +291,25 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
                     margin_call_ltv=float(ltv_input.value or 0.0),
                 )
             except (ValueError, KeyError) as exc:
-                result_panel.clear()
+                render_seeded_summary(entry_spot=None)
                 validation_label.set_text(str(exc))
+                render_result_validation(str(exc))
                 return
             except Exception:
-                result_panel.clear()
+                render_seeded_summary(entry_spot=None)
-                validation_label.set_text("Backtest failed. Please verify the scenario inputs and try again.")
+                message = "Backtest failed. Please verify the scenario inputs and try again."
+                validation_label.set_text(message)
+                render_result_validation(message)
                 return
             render_result(result)
 
         if workspace_id:
             start_input.on_value_change(lambda _event: refresh_workspace_seeded_units())
             end_input.on_value_change(lambda _event: refresh_workspace_seeded_units())
+        template_select.on_value_change(lambda _event: render_seeded_summary())
+        units_input.on_value_change(lambda _event: render_seeded_summary())
+        loan_input.on_value_change(lambda _event: render_seeded_summary())
+        ltv_input.on_value_change(lambda _event: render_seeded_summary())
         run_button.on_click(lambda: run_backtest())
+        render_seeded_summary(entry_spot=default_entry_spot)
         run_backtest()

app/pages/common.py

@@ -123,6 +123,17 @@ def strategy_metrics(
     return strategy_metrics_from_snapshot(strategy, scenario_pct, portfolio)
 
 
+def split_page_panes(*, left_testid: str, right_testid: str) -> tuple[ui.column, ui.column]:
+    with ui.row().classes("w-full items-start gap-6 max-lg:flex-col lg:flex-nowrap"):
+        left = ui.column().classes("min-w-0 w-full gap-6 lg:w-1/3 lg:flex-none").props(
+            f"data-testid={left_testid}"
+        )
+        right = ui.column().classes("min-w-0 w-full gap-6 lg:w-2/3 lg:flex-none").props(
+            f"data-testid={right_testid}"
+        )
+    return left, right
+
+
 @contextmanager
 def dashboard_page(title: str, subtitle: str, current: str, workspace_id: str | None = None) -> Iterator[ui.column]:
     ui.colors(primary="#0f172a", secondary="#1e293b", accent="#0ea5e9")
@@ -146,7 +157,7 @@ def dashboard_page(title: str, subtitle: str, current: str, workspace_id: str |
                 )
                 ui.link(label, href).classes(link_classes)
 
-    with ui.column().classes("mx-auto w-full max-w-7xl gap-6 bg-slate-50 p-6 dark:bg-slate-950") as container:
+    with ui.column().classes("w-full gap-6 bg-slate-50 p-6 dark:bg-slate-950") as container:
         with ui.row().classes("w-full items-end justify-between gap-4 max-md:flex-col max-md:items-start"):
             with ui.column().classes("gap-1"):
                 ui.label(title).classes("text-3xl font-bold text-slate-900 dark:text-slate-50")

app/pages/event_comparison.py

@@ -5,7 +5,7 @@ from nicegui import ui
 
 from app.domain.backtesting_math import asset_quantity_from_workspace_config
 from app.models.workspace import get_workspace_repository
-from app.pages.common import dashboard_page, render_workspace_recovery
+from app.pages.common import dashboard_page, split_page_panes
 from app.services.event_comparison_ui import EventComparisonPageService
 
 
@@ -72,9 +72,14 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
         "event-comparison",
         workspace_id=workspace_id,
     ):
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
+        left_pane, right_pane = split_page_panes(
+            left_testid="event-comparison-left-pane",
+            right_testid="event-comparison-right-pane",
+        )
+
+        with left_pane:
             with ui.card().classes(
-                "w-full max-w-xl rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
                 ui.label("Comparison Form").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
                 ui.label(
@@ -112,6 +117,11 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
                 validation_label = ui.label("").classes("text-sm text-rose-600 dark:text-rose-300")
                 run_button = ui.button("Run comparison").props("color=primary")
 
+            selected_summary = ui.card().classes(
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+            )
+
+        with right_pane:
             result_panel = ui.column().classes("w-full gap-6")
 
         def selected_template_slugs() -> tuple[str, ...]:
@@ -120,11 +130,35 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
                 return (raw_value,) if raw_value else ()
             return tuple(str(item) for item in raw_value if item)
 
+        def render_selected_summary(entry_spot: float | None = None) -> None:
+            selected_summary.clear()
+            with selected_summary:
+                ui.label("Scenario Summary").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                with ui.grid(columns=1).classes("w-full gap-4 sm:grid-cols-2 lg:grid-cols-1 xl:grid-cols-2"):
+                    cards = [
+                        (
+                            "Preset",
+                            preset_select_options.get(str(preset_select.value), str(preset_select.value or "—")),
+                        ),
+                        ("Templates", str(len(selected_template_slugs()))),
+                        ("Underlying units", f"{float(units_input.value or 0.0):,.0f}"),
+                        ("Loan amount", f"${float(loan_input.value or 0.0):,.0f}"),
+                        ("Margin call LTV", f"{float(ltv_input.value or 0.0):.1%}"),
+                        ("Entry spot", f"${entry_spot:,.2f}" if entry_spot is not None else "Pending"),
+                    ]
+                    for label, value in cards:
+                        with ui.card().classes(
+                            "rounded-xl border border-slate-200 bg-slate-50 p-4 shadow-none dark:border-slate-800 dark:bg-slate-950"
+                        ):
+                            ui.label(label).classes("text-sm text-slate-500 dark:text-slate-400")
+                            ui.label(value).classes("text-xl font-bold text-slate-900 dark:text-slate-100")
+
         def refresh_preset_details() -> None:
             option = preset_lookup.get(str(preset_select.value or ""))
             if option is None:
                 metadata_label.set_text("")
                 scenario_label.set_text("")
+                render_selected_summary(entry_spot=None)
                 return
             template_select.value = list(service.default_template_selection(str(option["slug"])))
             try:
@@ -153,6 +187,7 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
             except (ValueError, KeyError) as exc:
                 metadata_label.set_text(f"Preset: {option['label']} — {option['description']}")
                 scenario_label.set_text(str(exc))
+                render_selected_summary(entry_spot=None)
                 return
             preset = service.event_preset_service.get_preset(str(option["slug"]))
             metadata_label.set_text(f"Preset: {option['label']} — {option['description']}")
@@ -166,6 +201,16 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
                 )
                 + f" · Entry spot: ${scenario.initial_portfolio.entry_spot:,.2f}"
             )
+            render_selected_summary(entry_spot=float(scenario.initial_portfolio.entry_spot))
+
+        def render_result_validation(message: str) -> None:
+            result_panel.clear()
+            with result_panel:
+                with ui.card().classes(
+                    "w-full rounded-2xl border border-amber-200 bg-amber-50 shadow-sm dark:border-amber-900/60 dark:bg-amber-950/30"
+                ):
+                    ui.label("Scenario Results").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                    ui.label(message).classes("text-sm text-amber-800 dark:text-amber-200")
 
         def render_report() -> None:
             validation_label.set_text("")
@@ -180,9 +225,12 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
                 )
             except (ValueError, KeyError) as exc:
                 validation_label.set_text(str(exc))
+                render_result_validation(str(exc))
                 return
             except Exception:
-                validation_label.set_text("Event comparison failed. Please verify the seeded inputs and try again.")
+                message = "Event comparison failed. Please verify the seeded inputs and try again."
+                validation_label.set_text(message)
+                render_result_validation(message)
                 return
 
             preset = report.event_preset
@@ -195,13 +243,14 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
                 f"{scenario.start_date.isoformat()} → {scenario.end_date.isoformat()} · "
                 f"Entry spot: ${scenario.initial_portfolio.entry_spot:,.2f}"
             )
+            render_selected_summary(entry_spot=float(scenario.initial_portfolio.entry_spot))
             chart_model = service.chart_model(report)
 
             with result_panel:
                 with ui.card().classes(
                     "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
                 ):
-                    ui.label("Scenario Metadata").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                    ui.label("Scenario Results").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
                     with ui.grid(columns=4).classes("w-full gap-4 max-lg:grid-cols-2 max-sm:grid-cols-1"):
                         cards = [
                             ("Symbol", scenario.symbol),
@@ -292,6 +341,10 @@ def _render_event_comparison_page(workspace_id: str | None = None) -> None:
                     ).classes("h-96 w-full")
 
         preset_select.on_value_change(lambda _: refresh_preset_details())
+        template_select.on_value_change(lambda _: refresh_preset_details())
+        units_input.on_value_change(lambda _: refresh_preset_details())
+        loan_input.on_value_change(lambda _: refresh_preset_details())
+        ltv_input.on_value_change(lambda _: refresh_preset_details())
         run_button.on_click(lambda: render_report())
         refresh_preset_details()
         render_report()

app/pages/hedge.py

@@ -11,6 +11,7 @@ from app.pages.common import (
     dashboard_page,
     demo_spot_price,
     portfolio_snapshot,
+    split_page_panes,
     strategy_catalog,
     strategy_metrics,
 )
@@ -111,6 +112,7 @@ async def _render_hedge_page(workspace_id: str | None = None) -> None:
         spot_label = (
             f"Current spot reference: ${portfolio['spot_price']:,.2f}/oz (converted collateral spot via {quote_source})"
         )
+    updated_label = f"Quote timestamp: {quote_updated_at}" if quote_updated_at else "Quote timestamp: unavailable"
 
     with dashboard_page(
         "Hedge Analysis",
@@ -118,7 +120,12 @@ async def _render_hedge_page(workspace_id: str | None = None) -> None:
         "hedge",
         workspace_id=workspace_id,
     ):
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
+        left_pane, right_pane = split_page_panes(
+            left_testid="hedge-left-pane",
+            right_testid="hedge-right-pane",
+        )
+
+        with left_pane:
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
@@ -127,6 +134,7 @@ async def _render_hedge_page(workspace_id: str | None = None) -> None:
                 slider_value = ui.label("Scenario move: +0%").classes("text-sm text-slate-500 dark:text-slate-400")
                 slider = ui.slider(min=-25, max=25, value=0, step=5).classes("w-full")
                 ui.label(spot_label).classes("text-sm text-slate-500 dark:text-slate-400")
+                ui.label(updated_label).classes("text-xs text-slate-500 dark:text-slate-400")
                 if workspace_id:
                     ui.label(f"Workspace route: /{workspace_id}/hedge").classes(
                         "text-xs text-slate-500 dark:text-slate-400"
@@ -140,15 +148,18 @@ async def _render_hedge_page(workspace_id: str | None = None) -> None:
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             )
 
-        charts_row = ui.row().classes("w-full gap-6 max-lg:flex-col")
+        with right_pane:
-        with charts_row:
+            scenario_results = ui.card().classes(
-            initial_metrics = strategy_metrics(selected["strategy"], selected["scenario_pct"], portfolio=portfolio)
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
-            cost_chart = ui.echart(_cost_benefit_options(initial_metrics)).classes(
-                "h-96 w-full rounded-2xl border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900"
-            )
-            waterfall_chart = ui.echart(_waterfall_options(initial_metrics)).classes(
-                "h-96 w-full rounded-2xl border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900"
             )
+            with ui.row().classes("w-full gap-6 max-xl:flex-col"):
+                initial_metrics = strategy_metrics(selected["strategy"], selected["scenario_pct"], portfolio=portfolio)
+                cost_chart = ui.echart(_cost_benefit_options(initial_metrics)).classes(
+                    "h-96 w-full rounded-2xl border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900"
+                )
+                waterfall_chart = ui.echart(_waterfall_options(initial_metrics)).classes(
+                    "h-96 w-full rounded-2xl border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900"
+                )
 
         def render_summary() -> None:
             metrics = strategy_metrics(selected["strategy"], selected["scenario_pct"], portfolio=portfolio)
@@ -156,7 +167,8 @@ async def _render_hedge_page(workspace_id: str | None = None) -> None:
             summary.clear()
             with summary:
                 ui.label("Scenario Summary").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
-                with ui.grid(columns=3).classes("w-full gap-4 max-lg:grid-cols-2 max-sm:grid-cols-1"):
+                ui.label(strategy["description"]).classes("text-sm text-slate-600 dark:text-slate-300")
+                with ui.grid(columns=1).classes("w-full gap-4 sm:grid-cols-2 lg:grid-cols-1 xl:grid-cols-2"):
                     cards = [
                         ("Start value", f"${portfolio['gold_value']:,.0f}"),
                         ("Start price", f"${portfolio['spot_price']:,.2f}/oz"),
@@ -164,10 +176,6 @@ async def _render_hedge_page(workspace_id: str | None = None) -> None:
                         ("Loan amount", f"${portfolio['loan_amount']:,.0f}"),
                         ("Margin call LTV", f"{portfolio['margin_call_ltv']:.1%}"),
                         ("Monthly hedge budget", f"${portfolio['hedge_budget']:,.0f}"),
-                        ("Scenario spot", f"${metrics['scenario_price']:,.2f}"),
-                        ("Hedge cost", f"${strategy['estimated_cost']:,.2f}/oz"),
-                        ("Unhedged equity", f"${metrics['unhedged_equity']:,.0f}"),
-                        ("Hedged equity", f"${metrics['hedged_equity']:,.0f}"),
                     ]
                     for label, value in cards:
                         with ui.card().classes(
@@ -175,7 +183,25 @@ async def _render_hedge_page(workspace_id: str | None = None) -> None:
                         ):
                             ui.label(label).classes("text-sm text-slate-500 dark:text-slate-400")
                             ui.label(value).classes("text-2xl font-bold text-slate-900 dark:text-slate-100")
-                ui.label(strategy["description"]).classes("text-sm text-slate-600 dark:text-slate-300")
+
+            scenario_results.clear()
+            with scenario_results:
+                ui.label("Scenario Results").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                with ui.grid(columns=2).classes("w-full gap-4 max-md:grid-cols-1"):
+                    result_cards = [
+                        ("Scenario spot", f"${metrics['scenario_price']:,.2f}"),
+                        ("Hedge cost", f"${strategy['estimated_cost']:,.2f}/oz"),
+                        ("Unhedged equity", f"${metrics['unhedged_equity']:,.0f}"),
+                        ("Hedged equity", f"${metrics['hedged_equity']:,.0f}"),
+                        ("Net hedge benefit", f"${metrics['hedged_equity'] - metrics['unhedged_equity']:,.0f}"),
+                        ("Scenario move", f"{selected['scenario_pct']:+d}%"),
+                    ]
+                    for label, value in result_cards:
+                        with ui.card().classes(
+                            "rounded-xl border border-slate-200 bg-slate-50 p-4 shadow-none dark:border-slate-800 dark:bg-slate-950"
+                        ):
+                            ui.label(label).classes("text-sm text-slate-500 dark:text-slate-400")
+                            ui.label(value).classes("text-2xl font-bold text-slate-900 dark:text-slate-100")
 
             cost_chart.options.clear()
             cost_chart.options.update(_cost_benefit_options(metrics))

app/pages/options.py

@@ -5,7 +5,7 @@ from typing import Any
 from nicegui import ui
 
 from app.components import GreeksTable
-from app.pages.common import dashboard_page, strategy_catalog
+from app.pages.common import dashboard_page, split_page_panes, strategy_catalog
 from app.services.runtime import get_data_service
 
 
@@ -39,7 +39,12 @@ async def options_page() -> None:
         "Browse GLD contracts, filter by expiry and strike range, inspect Greeks, and attach contracts to hedge workflows.",
         "options",
     ):
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
+        left_pane, right_pane = split_page_panes(
+            left_testid="options-left-pane",
+            right_testid="options-right-pane",
+        )
+
+        with left_pane:
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
@@ -61,11 +66,13 @@ async def options_page() -> None:
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             )
 
-        chain_table = ui.html("").classes("w-full")
+        with right_pane:
-        greeks = GreeksTable([])
+            chain_table = ui.html("").classes("w-full")
-        quick_add = ui.card().classes(
+            with ui.row().classes("w-full gap-6 max-xl:flex-col"):
-            "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+                greeks = GreeksTable([])
-        )
+                quick_add = ui.card().classes(
+                    "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+                )
 
         def sync_status() -> None:
             current_data = chain_state["data"]
@@ -96,10 +103,15 @@ async def options_page() -> None:
                 if not chosen_contracts:
                     ui.label("No contracts added yet.").classes("text-sm text-slate-500 dark:text-slate-400")
                     return
-                for contract in chosen_contracts[-3:]:
+                with ui.column().classes("w-full gap-3"):
-                    ui.label(
+                    for contract in chosen_contracts[-3:]:
-                        f"{contract['symbol']} · premium ${float(contract['premium']):.2f} · IV {float(contract.get('impliedVolatility', 0.0)):.1%}"
+                        with ui.card().classes(
-                    ).classes("text-sm text-slate-600 dark:text-slate-300")
+                            "rounded-xl border border-slate-200 bg-slate-50 p-4 shadow-none dark:border-slate-800 dark:bg-slate-950"
+                        ):
+                            ui.label(contract["symbol"]).classes("font-semibold text-slate-900 dark:text-slate-100")
+                            ui.label(
+                                f"Premium ${float(contract['premium']):.2f} · IV {float(contract.get('impliedVolatility', 0.0)):.1%}"
+                            ).classes("text-sm text-slate-600 dark:text-slate-300")
 
         def add_to_strategy(contract: dict[str, Any]) -> None:
             chosen_contracts.append(contract)
@@ -165,7 +177,7 @@ async def options_page() -> None:
                             f"Add {row['type'].upper()} {float(row['strike']):.0f}",
                             on_click=lambda _, contract=row: add_to_strategy(contract),
                         ).props("outline color=primary")
-            greeks.set_options(rows[:6])
+            greeks.set_options(chosen_contracts[-6:] if chosen_contracts else rows[:6])
 
         async def load_expiry_chain(expiry: str | None) -> None:
             selected_expiry["value"] = expiry

app/pages/overview.py

@@ -9,7 +9,13 @@ from nicegui import ui
 from app.components import PortfolioOverview
 from app.domain.portfolio_math import resolve_portfolio_spot_from_quote
 from app.models.workspace import WORKSPACE_COOKIE, get_workspace_repository
-from app.pages.common import dashboard_page, quick_recommendations, recommendation_style, strategy_catalog
+from app.pages.common import (
+    dashboard_page,
+    quick_recommendations,
+    recommendation_style,
+    split_page_panes,
+    strategy_catalog,
+)
 from app.services.alerts import AlertService, build_portfolio_alert_context
 from app.services.runtime import get_data_service
 from app.services.turnstile import load_turnstile_settings
@@ -129,6 +135,12 @@ async def overview_page(workspace_id: str) -> None:
             f"Last updated {_format_timestamp(str(portfolio['quote_updated_at']))}"
         )
 
+    spot_caption = (
+        f"{symbol} share quote converted to USD/ozt via {portfolio['quote_source']}"
+        if portfolio["quote_source"] != "configured_entry_price"
+        else "Configured entry price fallback in USD/ozt"
+    )
+
     with dashboard_page(
         "Overview",
         "Portfolio health, LTV risk, and quick strategy guidance for the current GLD-backed loan.",
@@ -141,123 +153,134 @@ async def overview_page(workspace_id: str) -> None:
                 f"Configured collateral baseline: ${config.gold_value:,.0f} · Loan ${config.loan_amount:,.0f}"
             ).classes("text-sm text-slate-500 dark:text-slate-400")
 
-        with ui.card().classes(
+        left_pane, right_pane = split_page_panes(
-            "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+            left_testid="overview-left-pane",
-        ):
+            right_testid="overview-right-pane",
-            with ui.row().classes("w-full items-center justify-between gap-3"):
-                ui.label("Alert Status").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
-                ui.label(alert_status.severity.upper()).classes(_alert_badge_classes(alert_status.severity))
-            ui.label(alert_status.message).classes("text-sm text-slate-600 dark:text-slate-300")
-            ui.label(
-                f"Warning at {alert_status.warning_threshold:.0%} · Critical at {alert_status.critical_threshold:.0%} · "
-                f"Email alerts {'enabled' if alert_status.email_alerts_enabled else 'disabled'}"
-            ).classes("text-sm text-slate-500 dark:text-slate-400")
-            if alert_status.history:
-                latest = alert_status.history[0]
-                ui.label(
-                    f"Latest alert logged {_format_timestamp(latest.updated_at)} at collateral spot ${latest.spot_price:,.2f}"
-                ).classes("text-xs text-slate-500 dark:text-slate-400")
-
-        spot_caption = (
-            f"{symbol} share quote converted to USD/ozt via {portfolio['quote_source']}"
-            if portfolio["quote_source"] != "configured_entry_price"
-            else "Configured entry price fallback in USD/ozt"
         )
 
-        with ui.grid(columns=4).classes("w-full gap-4 max-lg:grid-cols-2 max-sm:grid-cols-1"):
+        with left_pane:
-            summary_cards = [
-                (
-                    "Collateral Spot Price",
-                    f"${portfolio['spot_price']:,.2f}",
-                    spot_caption,
-                ),
-                (
-                    "Margin Call Price",
-                    f"${portfolio['margin_call_price']:,.2f}",
-                    "Implied trigger level from persisted portfolio settings",
-                ),
-                (
-                    "Cash Buffer",
-                    f"${portfolio['cash_buffer']:,.0f}",
-                    "Base liquidity plus unrealized gain cushion vs configured baseline",
-                ),
-                (
-                    "Hedge Budget",
-                    f"${portfolio['hedge_budget']:,.0f}",
-                    "Monthly budget from saved settings",
-                ),
-            ]
-            for title, value, caption in summary_cards:
-                with ui.card().classes(
-                    "rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
-                ):
-                    ui.label(title).classes("text-sm font-medium text-slate-500 dark:text-slate-400")
-                    ui.label(value).classes("text-3xl font-bold text-slate-900 dark:text-slate-50")
-                    ui.label(caption).classes("text-sm text-slate-500 dark:text-slate-400")
-
-        portfolio_view = PortfolioOverview(margin_call_ltv=float(portfolio["margin_call_ltv"]))
-        portfolio_view.update(portfolio)
-
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
-                with ui.row().classes("w-full items-center justify-between"):
+                with ui.row().classes("w-full items-center justify-between gap-3"):
-                    ui.label("Current LTV Status").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                    ui.label("Alert Status").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
-                    ui.label(f"Threshold {float(portfolio['margin_call_ltv']) * 100:.0f}%").classes(
+                    ui.label(alert_status.severity.upper()).classes(_alert_badge_classes(alert_status.severity))
-                        "rounded-full bg-rose-100 px-3 py-1 text-xs font-semibold text-rose-700 dark:bg-rose-500/15 dark:text-rose-300"
+                ui.label(alert_status.message).classes("text-sm text-slate-600 dark:text-slate-300")
-                    )
-                ui.linear_progress(
-                    value=float(portfolio["ltv_ratio"]) / max(float(portfolio["margin_call_ltv"]), 0.01),
-                    show_value=False,
-                ).props("color=warning track-color=grey-3 rounded")
                 ui.label(
-                    f"Current LTV is {float(portfolio['ltv_ratio']) * 100:.1f}% with a margin buffer of {(float(portfolio['margin_call_ltv']) - float(portfolio['ltv_ratio'])) * 100:.1f} percentage points."
+                    f"Warning at {alert_status.warning_threshold:.0%} · Critical at {alert_status.critical_threshold:.0%} · "
-                ).classes("text-sm text-slate-600 dark:text-slate-300")
+                    f"Email alerts {'enabled' if alert_status.email_alerts_enabled else 'disabled'}"
-                ui.label(
+                ).classes("text-sm text-slate-500 dark:text-slate-400")
-                    "Warning: if GLD approaches the margin-call price, collateral remediation or hedge monetization will be required."
-                ).classes("text-sm font-medium text-amber-700 dark:text-amber-300")
-
-            with ui.card().classes(
-                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
-            ):
-                ui.label("Recent Alert History").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
                 if alert_status.history:
-                    for event in alert_status.history[:5]:
+                    latest = alert_status.history[0]
-                        with ui.row().classes(
-                            "w-full items-start justify-between gap-4 border-b border-slate-100 py-3 last:border-b-0 dark:border-slate-800"
-                        ):
-                            with ui.column().classes("gap-1"):
-                                ui.label(event.message).classes(
-                                    "text-sm font-medium text-slate-900 dark:text-slate-100"
-                                )
-                                ui.label(
-                                    f"Logged {_format_timestamp(event.updated_at)} · Spot ${event.spot_price:,.2f} · LTV {event.ltv_ratio:.1%}"
-                                ).classes("text-xs text-slate-500 dark:text-slate-400")
-                            ui.label(event.severity.upper()).classes(_alert_badge_classes(event.severity))
-                else:
                     ui.label(
-                        "No alert history yet. Alerts will be logged once the warning threshold is crossed."
+                        f"Latest alert logged {_format_timestamp(latest.updated_at)} at collateral spot ${latest.spot_price:,.2f}"
-                    ).classes("text-sm text-slate-500 dark:text-slate-400")
+                    ).classes("text-xs text-slate-500 dark:text-slate-400")
 
-        with ui.card().classes(
+            with ui.card().classes(
-            "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
-        ):
+            ):
-            ui.label("Strategy Snapshot").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                ui.label("Portfolio Snapshot").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
-            for strategy in strategy_catalog():
+                with ui.grid(columns=1).classes("w-full gap-4 sm:grid-cols-2 lg:grid-cols-1 xl:grid-cols-2"):
-                with ui.row().classes(
+                    summary_cards = [
-                    "w-full items-start justify-between gap-4 border-b border-slate-100 py-3 last:border-b-0 dark:border-slate-800"
+                        (
+                            "Collateral Spot Price",
+                            f"${portfolio['spot_price']:,.2f}",
+                            spot_caption,
+                        ),
+                        (
+                            "Margin Call Price",
+                            f"${portfolio['margin_call_price']:,.2f}",
+                            "Implied trigger level from persisted portfolio settings",
+                        ),
+                        (
+                            "Cash Buffer",
+                            f"${portfolio['cash_buffer']:,.0f}",
+                            "Base liquidity plus unrealized gain cushion vs configured baseline",
+                        ),
+                        (
+                            "Hedge Budget",
+                            f"${portfolio['hedge_budget']:,.0f}",
+                            "Monthly budget from saved settings",
+                        ),
+                    ]
+                    for title, value, caption in summary_cards:
+                        with ui.card().classes(
+                            "rounded-xl border border-slate-200 bg-slate-50 p-4 shadow-none dark:border-slate-800 dark:bg-slate-950"
+                        ):
+                            ui.label(title).classes("text-sm font-medium text-slate-500 dark:text-slate-400")
+                            ui.label(value).classes("text-2xl font-bold text-slate-900 dark:text-slate-50")
+                            ui.label(caption).classes("text-sm text-slate-500 dark:text-slate-400")
+
+            with ui.card().classes(
+                f"w-full rounded-2xl border shadow-sm {recommendation_style('info')}"
+            ):
+                ui.label("Quick Strategy Recommendations").classes(
+                    "text-lg font-semibold text-slate-900 dark:text-slate-100"
+                )
+                for rec in quick_recommendations(portfolio):
+                    with ui.card().classes(f"rounded-xl border shadow-none {recommendation_style(rec['tone'])}"):
+                        ui.label(rec["title"]).classes("text-base font-semibold text-slate-900 dark:text-slate-100")
+                        ui.label(rec["summary"]).classes("text-sm text-slate-600 dark:text-slate-300")
+
+        with right_pane:
+            portfolio_view = PortfolioOverview(margin_call_ltv=float(portfolio["margin_call_ltv"]))
+            portfolio_view.update(portfolio)
+
+            with ui.row().classes("w-full gap-6 max-xl:flex-col"):
+                with ui.card().classes(
+                    "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
                 ):
-                    with ui.column().classes("gap-1"):
+                    with ui.row().classes("w-full items-center justify-between"):
-                        ui.label(strategy["label"]).classes("font-semibold text-slate-900 dark:text-slate-100")
+                        ui.label("Current LTV Status").classes(
-                        ui.label(strategy["description"]).classes("text-sm text-slate-500 dark:text-slate-400")
+                            "text-lg font-semibold text-slate-900 dark:text-slate-100"
-                    ui.label(f"${strategy['estimated_cost']:.2f}/oz").classes(
+                        )
-                        "rounded-full bg-sky-100 px-3 py-1 text-xs font-semibold text-sky-700 dark:bg-sky-500/15 dark:text-sky-300"
+                        ui.label(f"Threshold {float(portfolio['margin_call_ltv']) * 100:.0f}%").classes(
-                    )
+                            "rounded-full bg-rose-100 px-3 py-1 text-xs font-semibold text-rose-700 dark:bg-rose-500/15 dark:text-rose-300"
+                        )
+                    ui.linear_progress(
+                        value=float(portfolio["ltv_ratio"]) / max(float(portfolio["margin_call_ltv"]), 0.01),
+                        show_value=False,
+                    ).props("color=warning track-color=grey-3 rounded")
+                    ui.label(
+                        f"Current LTV is {float(portfolio['ltv_ratio']) * 100:.1f}% with a margin buffer of {(float(portfolio['margin_call_ltv']) - float(portfolio['ltv_ratio'])) * 100:.1f} percentage points."
+                    ).classes("text-sm text-slate-600 dark:text-slate-300")
+                    ui.label(
+                        "Warning: if GLD approaches the margin-call price, collateral remediation or hedge monetization will be required."
+                    ).classes("text-sm font-medium text-amber-700 dark:text-amber-300")
 
-        ui.label("Quick Strategy Recommendations").classes("text-xl font-semibold text-slate-900 dark:text-slate-100")
+                with ui.card().classes(
-        with ui.grid(columns=3).classes("w-full gap-4 max-lg:grid-cols-1"):
+                    "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
-            for rec in quick_recommendations(portfolio):
+                ):
-                with ui.card().classes(f"rounded-2xl border shadow-sm {recommendation_style(rec['tone'])}"):
+                    ui.label("Recent Alert History").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
-                    ui.label(rec["title"]).classes("text-base font-semibold text-slate-900 dark:text-slate-100")
+                    if alert_status.history:
-                    ui.label(rec["summary"]).classes("text-sm text-slate-600 dark:text-slate-300")
+                        for event in alert_status.history[:5]:
+                            with ui.row().classes(
+                                "w-full items-start justify-between gap-4 border-b border-slate-100 py-3 last:border-b-0 dark:border-slate-800"
+                            ):
+                                with ui.column().classes("gap-1"):
+                                    ui.label(event.message).classes(
+                                        "text-sm font-medium text-slate-900 dark:text-slate-100"
+                                    )
+                                    ui.label(
+                                        f"Logged {_format_timestamp(event.updated_at)} · Spot ${event.spot_price:,.2f} · LTV {event.ltv_ratio:.1%}"
+                                    ).classes("text-xs text-slate-500 dark:text-slate-400")
+                                ui.label(event.severity.upper()).classes(_alert_badge_classes(event.severity))
+                    else:
+                        ui.label(
+                            "No alert history yet. Alerts will be logged once the warning threshold is crossed."
+                        ).classes("text-sm text-slate-500 dark:text-slate-400")
+
+            with ui.card().classes(
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+            ):
+                ui.label("Strategy Snapshot").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                for strategy in strategy_catalog():
+                    with ui.row().classes(
+                        "w-full items-start justify-between gap-4 border-b border-slate-100 py-3 last:border-b-0 dark:border-slate-800"
+                    ):
+                        with ui.column().classes("gap-1"):
+                            ui.label(strategy["label"]).classes("font-semibold text-slate-900 dark:text-slate-100")
+                            ui.label(strategy["description"]).classes("text-sm text-slate-500 dark:text-slate-400")
+                        ui.label(f"${strategy['estimated_cost']:.2f}/oz").classes(
+                            "rounded-full bg-sky-100 px-3 py-1 text-xs font-semibold text-sky-700 dark:bg-sky-500/15 dark:text-sky-300"
+                        )

app/pages/settings.py

@@ -5,7 +5,7 @@ from nicegui import ui
 
 from app.models.portfolio import PortfolioConfig
 from app.models.workspace import get_workspace_repository
-from app.pages.common import dashboard_page
+from app.pages.common import dashboard_page, split_page_panes
 from app.services.alerts import AlertService, build_portfolio_alert_context
 from app.services.settings_status import save_status_text
 
@@ -84,7 +84,12 @@ def settings_page(workspace_id: str) -> None:
         "settings",
         workspace_id=workspace_id,
     ):
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
+        left_pane, right_pane = split_page_panes(
+            left_testid="settings-left-pane",
+            right_testid="settings-right-pane",
+        )
+
+        with left_pane:
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
@@ -154,28 +159,6 @@ def settings_page(workspace_id: str) -> None:
                     ui.label("Margin call at:").classes("ml-4 font-medium")
                     margin_price_display = ui.label()
 
-            with ui.card().classes(
-                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
-            ):
-                ui.label("Data Sources").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
-                primary_source = ui.select(
-                    ["yfinance", "ibkr", "alpaca"],
-                    value=config.primary_source,
-                    label="Primary source",
-                ).classes("w-full")
-                fallback_source = ui.select(
-                    ["fallback", "yfinance", "manual"],
-                    value=config.fallback_source,
-                    label="Fallback source",
-                ).classes("w-full")
-                refresh_interval = ui.number(
-                    "Refresh interval (seconds)",
-                    value=config.refresh_interval,
-                    min=1,
-                    step=1,
-                ).classes("w-full")
-
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
@@ -206,6 +189,28 @@ def settings_page(workspace_id: str) -> None:
                     "text-sm text-slate-500 dark:text-slate-400"
                 )
 
+        with right_pane:
+            with ui.card().classes(
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+            ):
+                ui.label("Data Sources").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                primary_source = ui.select(
+                    ["yfinance", "ibkr", "alpaca"],
+                    value=config.primary_source,
+                    label="Primary source",
+                ).classes("w-full")
+                fallback_source = ui.select(
+                    ["fallback", "yfinance", "manual"],
+                    value=config.fallback_source,
+                    label="Fallback source",
+                ).classes("w-full")
+                refresh_interval = ui.number(
+                    "Refresh interval (seconds)",
+                    value=config.refresh_interval,
+                    min=1,
+                    step=1,
+                ).classes("w-full")
+
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
@@ -216,7 +221,6 @@ def settings_page(workspace_id: str) -> None:
                 alert_message = ui.label().classes("text-sm text-slate-600 dark:text-slate-300")
                 alert_history_column = ui.column().classes("w-full gap-2")
 
-        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
@@ -224,8 +228,19 @@ def settings_page(workspace_id: str) -> None:
                 ui.select(["json", "csv", "yaml"], value="json", label="Export format").classes("w-full")
                 ui.switch("Include scenario history", value=True)
                 ui.switch("Include option selections", value=True)
-                ui.button("Import settings", icon="upload").props("outline color=primary")
+                with ui.row().classes("w-full gap-3 max-sm:flex-col"):
-                ui.button("Export settings", icon="download").props("outline color=primary")
+                    ui.button("Import settings", icon="upload").props("outline color=primary")
+                    ui.button("Export settings", icon="download").props("outline color=primary")
+
+            with ui.card().classes(
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+            ):
+                ui.label("Save Workspace Settings").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                status = ui.label(
+                    f"Current: start=${config.gold_value:,.0f}, entry=${config.entry_price:,.2f}/oz, "
+                    f"weight={config.gold_ounces:,.2f} oz, current LTV={config.current_ltv:.1%}"
+                ).classes("text-sm text-slate-500 dark:text-slate-400")
+                ui.button("Save settings", on_click=lambda: save_settings()).props("color=primary")
 
         def apply_entry_basis_mode() -> None:
             mode = str(entry_basis_mode.value or "value_price")
@@ -357,10 +372,3 @@ def settings_page(workspace_id: str) -> None:
                 ui.notify(f"Validation error: {e}", color="negative")
             except Exception as e:
                 ui.notify(f"Failed to save: {e}", color="negative")
-
-        with ui.row().classes("mt-6 w-full items-center justify-between gap-4"):
-            status = ui.label(
-                f"Current: start=${config.gold_value:,.0f}, entry=${config.entry_price:,.2f}/oz, "
-                f"weight={config.gold_ounces:,.2f} oz, current LTV={config.current_ltv:.1%}"
-            ).classes("text-sm text-slate-500 dark:text-slate-400")
-            ui.button("Save settings", on_click=save_settings).props("color=primary")

docs/roadmap/ROADMAP.yaml

@@ -11,6 +11,7 @@ notes:
   - One task lives in one YAML file and changes state by moving between status folders.
   - Priority ordering is maintained here so agents can parse one short file first.
 priority_queue:
+  - UX-001
   - CORE-001D
   - BT-003B
   - PORT-003
@@ -42,6 +43,7 @@ states:
     - BT-003B
     - BT-001C
     - CORE-001D
+    - UX-001
   in_progress: []
   done:
     - DATA-001

docs/roadmap/backlog/UX-001-full-width-two-pane-layout.yaml

@@ -0,0 +1,24 @@
+id: UX-001
+title: Full-Width Two-Pane Page Layout
+status: backlog
+priority: P1
+effort: M
+depends_on:
+  - PORT-004
+  - BT-001A
+  - BT-003A
+tags:
+  - ui
+  - layout
+  - nicegui
+summary: Use the full available browser width and standardize primary pages on a 1/3 control-summary pane and 2/3 charts-results pane.
+acceptance_criteria:
+  - Dashboard pages use the full available browser width instead of the current centered max-width container.
+  - Scenario-heavy pages use a consistent desktop two-pane layout with an approximately 1/3 left pane and 2/3 right pane.
+  - Left pane contains controls and summary content; right pane contains charts, tables, and scenario results.
+  - Mobile and narrow widths still stack cleanly without clipping.
+  - Browser-visible tests cover the split-pane structure on representative pages.
+technical_notes:
+  - Likely file targets include `app/pages/common.py`, `app/pages/hedge.py`, `app/pages/backtests.py`, `app/pages/event_comparison.py`, `app/pages/options.py`, and possibly `app/pages/overview.py` / `app/pages/settings.py` for consistent full-width layout.
+  - Prefer shared layout helpers in `app/pages/common.py` over page-specific one-off width classes.
+  - Add stable DOM hooks (for example `data-testid`) so layout structure can be asserted in browser tests.

tests/test_e2e_playwright.py

@@ -9,6 +9,21 @@ ARTIFACTS = Path("tests/artifacts")
 ARTIFACTS.mkdir(parents=True, exist_ok=True)
 
 
+def assert_two_pane_layout(page, left_testid: str, right_testid: str) -> None:
+    left = page.locator(f'[data-testid="{left_testid}"]:visible').first
+    right = page.locator(f'[data-testid="{right_testid}"]:visible').first
+    expect(left).to_be_visible(timeout=15000)
+    expect(right).to_be_visible(timeout=15000)
+    left_box = left.bounding_box()
+    right_box = right.bounding_box()
+    assert left_box is not None
+    assert right_box is not None
+    assert left_box["x"] < right_box["x"]
+    assert abs(left_box["y"] - right_box["y"]) < 120
+    width_ratio = right_box["width"] / left_box["width"]
+    assert 1.6 <= width_ratio <= 2.4
+
+
 def test_homepage_and_options_page_render() -> None:
     with sync_playwright() as p:
         browser = p.chromium.launch(headless=True)
@@ -29,6 +44,7 @@ def test_homepage_and_options_page_render() -> None:
         expect(page.locator("text=Overview").first).to_be_visible(timeout=10000)
         expect(page.locator("text=Live quote source:").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Alert Status").first).to_be_visible(timeout=15000)
+        assert_two_pane_layout(page, "overview-left-pane", "overview-right-pane")
         page.screenshot(path=str(ARTIFACTS / "overview.png"), full_page=True)
 
         page.goto(BASE_URL, wait_until="domcontentloaded", timeout=30000)
@@ -39,54 +55,34 @@ def test_homepage_and_options_page_render() -> None:
         expect(page.locator("text=Backtests").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Scenario Form").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Scenario Summary").first).to_be_visible(timeout=15000)
-        expect(page.locator("text=Daily Results").first).to_be_visible(timeout=15000)
+        assert_two_pane_layout(page, "backtests-left-pane", "backtests-right-pane")
         backtests_text = page.locator("body").inner_text(timeout=15000)
-        assert "Auto-derived entry spot: $100.00" in backtests_text
+        assert "Historical scenario starts undercollateralized:" in backtests_text
+        assert "loan_amount must be less than initial collateral value" not in backtests_text
         assert "RuntimeError" not in backtests_text
         assert "Server error" not in backtests_text
         assert "Traceback" not in backtests_text
         page.screenshot(path=str(ARTIFACTS / "backtests.png"), full_page=True)
 
-        page.get_by_label("Template").click()
-        page.get_by_text("Protective Put 95%", exact=True).click()
-        page.get_by_role("button", name="Run backtest").click()
-        expect(page.locator("text=Scenario Summary").first).to_be_visible(timeout=15000)
-        expect(page.locator("text=Template: Protective Put 95%").first).to_be_visible(timeout=15000)
-        rerun_text = page.locator("body").inner_text(timeout=15000)
-        assert "Margin call days hedged" in rerun_text
-        assert "RuntimeError" not in rerun_text
-        assert "Server error" not in rerun_text
-
         page.goto(f"{workspace_url}/event-comparison", wait_until="networkidle", timeout=30000)
         expect(page.locator("text=Event Comparison").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Comparison Form").first).to_be_visible(timeout=15000)
-        expect(page.locator("text=Ranked Results").first).to_be_visible(timeout=15000)
+        expect(page.locator("text=Scenario Summary").first).to_be_visible(timeout=15000)
-        expect(page.locator("text=Scenario Metadata").first).to_be_visible(timeout=15000)
+        assert_two_pane_layout(page, "event-comparison-left-pane", "event-comparison-right-pane")
-        expect(page.locator("text=Portfolio Value Paths").first).to_be_visible(timeout=15000)
         event_text = page.locator("body").inner_text(timeout=15000)
         assert "GLD January 2024 Selloff" in event_text
         assert "Protective Put ATM" in event_text
-        assert "Baseline series shows the unhedged collateral value path" in event_text
+        assert "Historical scenario starts undercollateralized:" in event_text
-        assert "Hedged margin call days" in event_text
+        assert "loan_amount must be less than initial collateral value" not in event_text
-        assert "Templates compared" in event_text and "4" in event_text
         assert "RuntimeError" not in event_text
         assert "Server error" not in event_text
         assert "Traceback" not in event_text
-
-        page.get_by_label("Event preset").click()
-        page.get_by_text("GLD January 2024 Drawdown", exact=True).click()
-        page.get_by_role("button", name="Run comparison").click()
-        expect(page.locator("text=GLD January 2024 Drawdown").first).to_be_visible(timeout=15000)
-        rerun_event_text = page.locator("body").inner_text(timeout=15000)
-        assert "Laddered Puts 33/33/33 ATM + 95% + 90%" in rerun_event_text
-        assert "Templates compared" in rerun_event_text and "3" in rerun_event_text
-        assert "RuntimeError" not in rerun_event_text
-        assert "Server error" not in rerun_event_text
         page.screenshot(path=str(ARTIFACTS / "event-comparison.png"), full_page=True)
 
         page.goto(f"{BASE_URL}/options", wait_until="domcontentloaded", timeout=30000)
         expect(page.locator("text=Options Chain").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Filters").first).to_be_visible(timeout=15000)
+        assert_two_pane_layout(page, "options-left-pane", "options-right-pane")
         body_text = page.locator("body").inner_text(timeout=15000)
         assert "Server error" not in body_text
         assert "RuntimeError" not in body_text
@@ -97,6 +93,7 @@ def test_homepage_and_options_page_render() -> None:
         expect(page.locator("text=Settings").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Collateral entry basis").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Entry price ($/oz)").first).to_be_visible(timeout=15000)
+        assert_two_pane_layout(page, "settings-left-pane", "settings-right-pane")
 
         page.get_by_label("Collateral entry basis").click()
         page.get_by_text("Gold weight + entry price", exact=True).click()
@@ -122,18 +119,56 @@ def test_homepage_and_options_page_render() -> None:
         expect(page.get_by_label("Underlying units")).to_have_value("2200")
         expect(page.get_by_label("Loan amount")).to_have_value("222000")
         expect(page.get_by_label("Margin call LTV")).to_have_value("0.8")
+        assert_two_pane_layout(page, "backtests-left-pane", "backtests-right-pane")
         backtests_workspace_text = page.locator("body").inner_text(timeout=15000)
         assert "Scenario Summary" in backtests_workspace_text
+        assert "Scenario Results" in backtests_workspace_text
         assert "$220,000" in backtests_workspace_text
+        assert "Historical scenario starts undercollateralized:" in backtests_workspace_text
+
+        page.get_by_label("Underlying units").fill("3000")
+        page.get_by_label("Template").click()
+        page.get_by_text("Protective Put 95%", exact=True).click()
+        page.get_by_role("button", name="Run backtest").click()
+        expect(page.locator("text=Daily Results").first).to_be_visible(timeout=15000)
+        expect(page.locator("text=Scenario Results").first).to_be_visible(timeout=15000)
+        expect(page.locator("text=Template: Protective Put 95%").first).to_be_visible(timeout=15000)
+        rerun_text = page.locator("body").inner_text(timeout=15000)
+        assert "Margin call days hedged" in rerun_text
+        assert "Historical scenario starts undercollateralized:" not in rerun_text
+        assert "RuntimeError" not in rerun_text
+        assert "Server error" not in rerun_text
 
         page.goto(f"{workspace_url}/event-comparison", wait_until="networkidle", timeout=30000)
         expect(page.get_by_label("Underlying units")).to_have_value("2200")
         expect(page.get_by_label("Loan amount")).to_have_value("222000")
         expect(page.get_by_label("Margin call LTV")).to_have_value("0.8")
+        assert_two_pane_layout(page, "event-comparison-left-pane", "event-comparison-right-pane")
         event_workspace_text = page.locator("body").inner_text(timeout=15000)
         assert "$222,000" in event_workspace_text
         assert "2,200" in event_workspace_text
         assert "80.0%" in event_workspace_text
+        assert "Historical scenario starts undercollateralized:" in event_workspace_text
+
+        page.get_by_label("Underlying units").fill("3000")
+        page.get_by_role("button", name="Run comparison").click()
+        expect(page.locator("text=Ranked Results").first).to_be_visible(timeout=15000)
+        expect(page.locator("text=Scenario Results").first).to_be_visible(timeout=15000)
+        expect(page.locator("text=Portfolio Value Paths").first).to_be_visible(timeout=15000)
+        rerun_event_text = page.locator("body").inner_text(timeout=15000)
+        assert "Baseline series shows the unhedged collateral value path" in rerun_event_text
+        assert "Templates compared" in rerun_event_text and "4" in rerun_event_text
+        assert "Historical scenario starts undercollateralized:" not in rerun_event_text
+
+        page.get_by_label("Event preset").click()
+        page.get_by_text("GLD January 2024 Drawdown", exact=True).click()
+        page.get_by_role("button", name="Run comparison").click()
+        expect(page.locator("text=GLD January 2024 Drawdown").first).to_be_visible(timeout=15000)
+        rerun_event_text = page.locator("body").inner_text(timeout=15000)
+        assert "Laddered Puts 33/33/33 ATM + 95% + 90%" in rerun_event_text
+        assert "Templates compared" in rerun_event_text and "3" in rerun_event_text
+        assert "RuntimeError" not in rerun_event_text
+        assert "Server error" not in rerun_event_text
 
         page.goto(workspace_url, wait_until="domcontentloaded", timeout=30000)
         overview_text = page.locator("body").inner_text(timeout=15000)
@@ -181,6 +216,7 @@ def test_homepage_and_options_page_render() -> None:
         expect(page.locator("text=Hedge Analysis").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Strategy selector").first).to_be_visible(timeout=15000)
         expect(page.locator("text=Strategy Controls").first).to_be_visible(timeout=15000)
+        assert_two_pane_layout(page, "hedge-left-pane", "hedge-right-pane")
         hedge_text = page.locator("body").inner_text(timeout=15000)
         assert "Scenario Summary" in hedge_text
         assert "RuntimeError" not in hedge_text