feat: add scenarios list page with metrics and quick actions

- Introduced a new template for listing scenarios associated with a project.
- Added metrics for total, active, draft, and archived scenarios.
- Implemented quick actions for creating new scenarios and reviewing project overview.
- Enhanced navigation with breadcrumbs for better user experience.

refactor: update Opex and Profitability templates for consistency

- Changed titles and button labels for clarity in Opex and Profitability templates.
- Updated form IDs and action URLs for better alignment with new naming conventions.
- Improved navigation links to include scenario and project overviews.

test: add integration tests for Opex calculations

- Created new tests for Opex calculation HTML and JSON flows.
- Validated successful calculations and ensured correct data persistence.
- Implemented tests for currency mismatch and unsupported frequency scenarios.

test: enhance project and scenario route tests

- Added tests to verify scenario list rendering and calculator shortcuts.
- Ensured scenario detail pages link back to the portfolio correctly.
- Validated project detail pages show associated scenarios accurately.

tests/integration/test_capex_calculations.py

@@ -48,7 +48,7 @@ def test_capex_calculation_html_flow(
         f"/calculations/capex?project_id={project_id}&scenario_id={scenario_id}"
     )
     assert form_page.status_code == 200
-    assert "Initial Capex Planner" in form_page.text
+    assert "Capex Planner" in form_page.text
 
     response = client.post(
         f"/calculations/capex?project_id={project_id}&scenario_id={scenario_id}",
@@ -71,7 +71,7 @@ def test_capex_calculation_html_flow(
         },
     )
     assert response.status_code == 200
-    assert "Initial capex calculation completed successfully." in response.text
+    assert "Capex calculation completed successfully." in response.text
     assert "Capex Summary" in response.text
     assert "$1,200,000.00" in response.text or "1,200,000" in response.text
     assert "USD" in response.text