feat: add footer component and complete Phase 2 static layout (Task 2.3)

dash_app/app.py

@@ -7,6 +7,7 @@ from dash_app.components.sidebar import make_sidebar
 from dash_app.components.kpi_row import make_kpi_row
 from dash_app.components.filter_bar import make_filter_bar
 from dash_app.components.chart_card import make_chart_card
+from dash_app.components.footer import make_footer
 
 app = Dash(
     __name__,
@@ -36,6 +37,7 @@ app.layout = dmc.MantineProvider(
                 make_kpi_row(),
                 make_filter_bar(),
                 make_chart_card(),
+                make_footer(),
             ],
         ),
     ],

dash_app/components/footer.py

@@ -0,0 +1,10 @@
+"""Page footer component."""
+from dash import html
+
+
+def make_footer():
+    """Build the page footer matching 01_nhs_classic.html."""
+    return html.Footer(
+        className="page-footer",
+        children="NHS Norfolk and Waveney ICB \u2014 High Cost Drugs Analysis",
+    )