feat: add Sprint 5 visualization components and Toronto dashboard

- Add figure factories: choropleth, time_series, summary_cards
- Add shared components: map_controls, time_slider, metric_card
- Create Toronto dashboard page with KPI cards, choropleth maps, and time series
- Add dashboard callbacks for interactivity
- Placeholder data for demonstration until QGIS boundaries are complete

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

portfolio_app/components/map_controls.py

@@ -0,0 +1,79 @@
+"""Map control components for choropleth visualizations."""
+
+from typing import Any
+
+import dash_mantine_components as dmc
+from dash import html
+
+
+def create_metric_selector(
+    id_prefix: str,
+    options: list[dict[str, str]],
+    default_value: str | None = None,
+    label: str = "Select Metric",
+) -> dmc.Select:
+    """Create a metric selector dropdown.
+
+    Args:
+        id_prefix: Prefix for component IDs.
+        options: List of options with 'label' and 'value' keys.
+        default_value: Initial selected value.
+        label: Label text for the selector.
+
+    Returns:
+        Mantine Select component.
+    """
+    return dmc.Select(
+        id=f"{id_prefix}-metric-selector",
+        label=label,
+        data=options,
+        value=default_value or (options[0]["value"] if options else None),
+        style={"width": "200px"},
+    )
+
+
+def create_map_controls(
+    id_prefix: str,
+    metric_options: list[dict[str, str]],
+    default_metric: str | None = None,
+    show_layer_toggle: bool = True,
+) -> dmc.Paper:
+    """Create a control panel for map visualizations.
+
+    Args:
+        id_prefix: Prefix for component IDs.
+        metric_options: Options for metric selector.
+        default_metric: Default selected metric.
+        show_layer_toggle: Whether to show layer visibility toggle.
+
+    Returns:
+        Mantine Paper component containing controls.
+    """
+    controls: list[Any] = [
+        create_metric_selector(
+            id_prefix=id_prefix,
+            options=metric_options,
+            default_value=default_metric,
+            label="Display Metric",
+        ),
+    ]
+
+    if show_layer_toggle:
+        controls.append(
+            dmc.Switch(
+                id=f"{id_prefix}-layer-toggle",
+                label="Show Boundaries",
+                checked=True,
+                style={"marginTop": "10px"},
+            )
+        )
+
+    return dmc.Paper(
+        children=[
+            dmc.Text("Map Controls", fw=500, size="sm", mb="xs"),
+            html.Div(controls),
+        ],
+        p="md",
+        radius="sm",
+        withBorder=True,
+    )