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/profitability_snapshot.py

@@ -43,13 +43,13 @@ class ProjectProfitability(Base):
         Numeric(12, 6), nullable=True)
     revenue_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True)
-    processing_opex_total: Mapped[float | None] = mapped_column(
+    opex_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True
     )
     sustaining_capex_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True
     )
-    initial_capex: Mapped[float | None] = mapped_column(
+    capex: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True)
     net_cash_flow_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True
@@ -102,13 +102,13 @@ class ScenarioProfitability(Base):
         Numeric(12, 6), nullable=True)
     revenue_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True)
-    processing_opex_total: Mapped[float | None] = mapped_column(
+    opex_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True
     )
     sustaining_capex_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True
     )
-    initial_capex: Mapped[float | None] = mapped_column(
+    capex: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True)
     net_cash_flow_total: Mapped[float | None] = mapped_column(
         Numeric(18, 2), nullable=True