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.

main.py

@@ -19,6 +19,7 @@ from routes.projects import router as projects_router
 from routes.reports import router as reports_router
 from routes.scenarios import router as scenarios_router
 from routes.ui import router as ui_router
+from routes.navigation import router as navigation_router
 from monitoring import router as monitoring_router
 from services.bootstrap import bootstrap_admin, bootstrap_pricing_settings
 from scripts.init_db import init_db as init_db_script
@@ -113,5 +114,6 @@ app.include_router(scenarios_router)
 app.include_router(reports_router)
 app.include_router(ui_router)
 app.include_router(monitoring_router)
+app.include_router(navigation_router)
 
 app.mount("/static", StaticFiles(directory="static"), name="static")