feat: Enhance currency handling and validation across scenarios

- Updated form template to prefill currency input with default value and added help text for clarity.
- Modified integration tests to assert more descriptive error messages for invalid currency codes.
- Introduced new tests for currency normalization and validation in various scenarios, including imports and exports.
- Added comprehensive tests for pricing calculations, ensuring defaults are respected and overrides function correctly.
- Implemented unit tests for pricing settings repository, ensuring CRUD operations and default settings are handled properly.
- Enhanced scenario pricing evaluation tests to validate currency handling and metadata defaults.
- Added simulation tests to ensure Monte Carlo runs are accurate and handle various distribution scenarios.

templates/partials/reports/filters_card.html

@@ -0,0 +1,33 @@
+{% if filters %}
+  <section class="report-filters">
+    <div class="report-card">
+      <h2>Active Filters</h2>
+      <dl class="definition-list">
+        {% if filters.scenario_ids %}
+          <div>
+            <dt>Scenario IDs</dt>
+            <dd>{{ filters.scenario_ids | join(', ') }}</dd>
+          </div>
+        {% endif %}
+        {% if filters.start_date %}
+          <div>
+            <dt>Start Date</dt>
+            <dd>{{ filters.start_date }}</dd>
+          </div>
+        {% endif %}
+        {% if filters.end_date %}
+          <div>
+            <dt>End Date</dt>
+            <dd>{{ filters.end_date }}</dd>
+          </div>
+        {% endif %}
+        {% if not (filters.scenario_ids or filters.start_date or filters.end_date) %}
+          <div>
+            <dt>Status</dt>
+            <dd>No filters applied</dd>
+          </div>
+        {% endif %}
+      </dl>
+    </div>
+  </section>
+{% endif %}

templates/partials/reports/monte_carlo_table.html

@@ -0,0 +1,46 @@
+{% set sorted_metrics = metrics | dictsort %}
+{% set ns = namespace(percentile_keys=[]) %}
+{% if percentiles %}
+  {% set ns.percentile_keys = percentiles %}
+{% elif sorted_metrics %}
+  {% set reference_percentiles = sorted_metrics[0][1].percentiles.keys() | list %}
+  {% set ns.percentile_keys = reference_percentiles %}
+{% endif %}
+
+{% if sorted_metrics %}
+  <table class="metrics-table">
+    <thead>
+      <tr>
+        <th scope="col">Metric</th>
+        <th scope="col">Mean</th>
+        {% for percentile in ns.percentile_keys %}
+          {% set percentile_label = '%g' % percentile %}
+          <th scope="col">P{{ percentile_label }}</th>
+        {% endfor %}
+        <th scope="col">Std Dev</th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for metric_name, summary in sorted_metrics %}
+        <tr>
+          <th scope="row">{{ metric_name | replace('_', ' ') | title }}</th>
+          <td>{{ summary.mean | format_metric(metric_name, currency) }}</td>
+          {% for percentile in ns.percentile_keys %}
+            {% set percentile_key = '%g' % percentile %}
+            {% set percentile_value = summary.percentiles.get(percentile_key) %}
+            <td>
+              {% if percentile_value is not none %}
+                {{ percentile_value | format_metric(metric_name, currency) }}
+              {% else %}
+                —
+              {% endif %}
+            </td>
+          {% endfor %}
+          <td>{{ summary.std_dev | format_metric(metric_name, currency) }}</td>
+        </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+{% else %}
+  <p class="muted">Monte Carlo metrics are unavailable.</p>
+{% endif %}

templates/partials/reports/options_card.html

@@ -0,0 +1,56 @@
+{% if options %}
+  {% set distribution_enabled = options.distribution %}
+  {% set samples_enabled = options.samples and options.distribution %}
+{% endif %}
+
+<section class="report-options">
+  <div class="report-card">
+    <h2>Data Options</h2>
+    <ul class="metric-list compact">
+      <li>
+        <span>Monte Carlo Distribution</span>
+        <strong>
+          {% if options %}
+            {{ distribution_enabled and "Enabled" or "Disabled" }}
+          {% else %}
+            Not requested
+          {% endif %}
+        </strong>
+      </li>
+      <li>
+        <span>Sample Storage</span>
+        <strong>
+          {% if options %}
+            {% if options.samples %}
+              {% if samples_enabled %}
+                Enabled
+              {% else %}
+                Requires distribution
+              {% endif %}
+            {% else %}
+              Disabled
+            {% endif %}
+          {% else %}
+            Not requested
+          {% endif %}
+        </strong>
+      </li>
+      <li>
+        <span>Iterations</span>
+        <strong>{{ iterations }}</strong>
+      </li>
+      <li>
+        <span>Percentiles</span>
+        <strong>
+          {% if percentiles %}
+            {% for percentile in percentiles %}
+              {{ '%g' % percentile }}{% if not loop.last %}, {% endif %}
+            {% endfor %}
+          {% else %}
+            Defaults
+          {% endif %}
+        </strong>
+      </li>
+    </ul>
+  </div>
+</section>

templates/partials/reports/scenario_actions.html

@@ -0,0 +1,14 @@
+<div class="scenario-actions">
+  <a
+    href="{{ request.url_for('reports.scenario_distribution_page', scenario_id=scenario.id) }}"
+    class="button button-secondary"
+  >
+    View Distribution
+  </a>
+  <a
+    href="{{ request.url_for('reports.scenario_distribution', scenario_id=scenario.id) }}"
+    class="button button-secondary"
+  >
+    Download JSON
+  </a>
+</div>