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.

models/capex_snapshot.py

@@ -16,7 +16,7 @@ if TYPE_CHECKING:  # pragma: no cover
 
 
 class ProjectCapexSnapshot(Base):
-    """Snapshot of aggregated initial capex metrics at the project level."""
+    """Snapshot of aggregated capex metrics at the project level."""
 
     __tablename__ = "project_capex_snapshots"
 
@@ -64,7 +64,7 @@ class ProjectCapexSnapshot(Base):
 
 
 class ScenarioCapexSnapshot(Base):
-    """Snapshot of initial capex metrics for an individual scenario."""
+    """Snapshot of capex metrics for an individual scenario."""
 
     __tablename__ = "scenario_capex_snapshots"