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.

templates/scenarios/detail.html

@@ -13,28 +13,36 @@
   </nav>
 
   <header class="page-header">
-    {% set profitability_href = url_for('calculations.profitability_form') %}
-    {% set processing_opex_href = url_for('calculations.processing_opex_form') %}
+    {% set profitability_href = '/calculations/profitability' %}
+    {% set opex_href = url_for('calculations.opex_form') %}
     {% set capex_href = url_for('calculations.capex_form') %}
+    {% set scenario_list_href = url_for('scenarios.project_scenario_list', project_id=project.id) %}
     {% if project and scenario %}
-      {% set profitability_href = profitability_href ~ '?project_id=' ~ project.id ~ '&scenario_id=' ~ scenario.id %}
-      {% set processing_opex_href = processing_opex_href ~ '?project_id=' ~ project.id ~ '&scenario_id=' ~ scenario.id %}
+      {% set profitability_href = url_for('calculations.profitability_form', project_id=project.id, scenario_id=scenario.id) %}
+      {% set opex_href = opex_href ~ '?project_id=' ~ project.id ~ '&scenario_id=' ~ scenario.id %}
       {% set capex_href = capex_href ~ '?project_id=' ~ project.id ~ '&scenario_id=' ~ scenario.id %}
     {% endif %}
     <div>
       <h1>{{ scenario.name }}</h1>
-      <p class="text-muted">Status: {{ scenario.status.value.title() }}</p>
+      <p class="text-muted">
+        Part of <a href="{{ url_for('projects.view_project', project_id=project.id) }}">{{ project.name }}</a>
+      </p>
     </div>
     <div class="header-actions">
-      <a class="btn" href="{{ url_for('projects.view_project', project_id=project.id) }}">Back to Project</a>
+      <a class="btn" href="{{ scenario_list_href }}">Scenario Portfolio</a>
       <a class="btn" href="{{ profitability_href }}">Profitability Calculator</a>
-      <a class="btn" href="{{ processing_opex_href }}">Processing Opex Planner</a>
-      <a class="btn" href="{{ capex_href }}">Initial Capex Planner</a>
+      <a class="btn" href="{{ opex_href }}">Opex Planner</a>
+      <a class="btn" href="{{ capex_href }}">Capex Planner</a>
       <a class="btn primary" href="{{ url_for('scenarios.edit_scenario_form', scenario_id=scenario.id) }}">Edit Scenario</a>
     </div>
   </header>
 
   <section class="scenario-metrics">
+    <article class="metric-card">
+      <h2>Status</h2>
+      <p class="metric-value status-pill status-pill--{{ scenario.status.value }}">{{ scenario.status.value.title() }}</p>
+      <span class="metric-caption">Lifecycle state</span>
+    </article>
     <article class="metric-card">
       <h2>Financial Inputs</h2>
       <p class="metric-value">{{ scenario_metrics.financial_count }}</p>
@@ -50,37 +58,54 @@
       <p class="metric-value">{{ scenario_metrics.currency or '—' }}</p>
       <span class="metric-caption">Financial reporting</span>
     </article>
-    <article class="metric-card">
-      <h2>Primary Resource</h2>
-      <p class="metric-value">{{ scenario_metrics.primary_resource or '—' }}</p>
-      <span class="metric-caption">Scenario focus</span>
-    </article>
   </section>
 
   <div class="scenario-layout">
-    <section class="card">
-      <h2>Scenario Details</h2>
-      <dl class="definition-list">
-        <div>
-          <dt>Description</dt>
-          <dd>{{ scenario.description or 'No description provided.' }}</dd>
-        </div>
-        <div>
-          <dt>Timeline</dt>
-          <dd>
-            {{ scenario.start_date or '—' }} → {{ scenario.end_date or '—' }}
-          </dd>
-        </div>
-        <div>
-          <dt>Discount Rate</dt>
-          <dd>{{ scenario.discount_rate or '—' }}</dd>
-        </div>
-        <div>
-          <dt>Last Updated</dt>
-          <dd>{{ scenario.updated_at.strftime('%Y-%m-%d %H:%M') if scenario.updated_at else '—' }}</dd>
-        </div>
-      </dl>
-    </section>
+    <div class="scenario-column">
+      <section class="card">
+        <h2>Scenario Overview</h2>
+        <dl class="definition-list">
+          <div>
+            <dt>Description</dt>
+            <dd>{{ scenario.description or 'No description provided.' }}</dd>
+          </div>
+          <div>
+            <dt>Timeline</dt>
+            <dd>{{ scenario.start_date or '—' }} → {{ scenario.end_date or '—' }}</dd>
+          </div>
+          <div>
+            <dt>Discount Rate</dt>
+            <dd>{{ scenario.discount_rate or '—' }}</dd>
+          </div>
+          <div>
+            <dt>Primary Resource</dt>
+            <dd>{{ scenario_metrics.primary_resource or '—' }}</dd>
+          </div>
+          <div>
+            <dt>Last Updated</dt>
+            <dd>{{ scenario.updated_at.strftime('%Y-%m-%d %H:%M') if scenario.updated_at else '—' }}</dd>
+          </div>
+        </dl>
+      </section>
+
+      <section class="card quick-actions-card">
+        <h2>Next Steps</h2>
+        <ul class="quick-link-list">
+          <li>
+            <a href="{{ profitability_href }}">Run profitability analysis</a>
+            <p>Uses this scenario’s assumptions as defaults.</p>
+          </li>
+          <li>
+            <a href="{{ scenario_list_href }}">Browse all project scenarios</a>
+            <p>Compare assumption sets and launch calculators in context.</p>
+          </li>
+          <li>
+            <a href="{{ url_for('scenarios.edit_scenario_form', scenario_id=scenario.id) }}">Update scenario assumptions</a>
+            <p>Adjust dates, status, or drivers before recalculations.</p>
+          </li>
+        </ul>
+      </section>
+    </div>
 
     <section class="card">
       <h2>Financial Inputs</h2>