feat: enhance metrics dashboard with new components and data handling

- Introduced `MetricsOverview`, `MetricsMainCharts`, `MetricsDistributionCharts`, `MetricsVelocitySection`, and `MetricsProductivitySection` for improved metrics visualization.
- Updated `MetricsTab` to integrate new components and streamline data presentation.
- Added compatibility fields in `JiraTask` and `AssigneeDistribution` for better data handling.
- Refactored `calculateAssigneeDistribution` to include a count for total issues.
- Enhanced `JiraAnalyticsService` and `JiraAdvancedFiltersService` to support new metrics calculations.
- Cleaned up unused imports and components for a more maintainable codebase.

src/components/jira/anomaly/AnomalySummary.tsx

@@ -0,0 +1,46 @@
+'use client';
+
+import { Badge } from '@/components/ui/Badge';
+import { JiraAnomaly } from '@/services/jira-anomaly-detection';
+
+interface AnomalySummaryProps {
+  anomalies: JiraAnomaly[];
+  isExpanded: boolean;
+  onToggleExpanded: () => void;
+}
+
+export function AnomalySummary({ anomalies, isExpanded, onToggleExpanded }: AnomalySummaryProps) {
+  const criticalCount = anomalies.filter(a => a.severity === 'critical').length;
+  const highCount = anomalies.filter(a => a.severity === 'high').length;
+  const totalCount = anomalies.length;
+
+  return (
+    <div 
+      className="cursor-pointer hover:bg-[var(--muted)] transition-colors"
+      onClick={onToggleExpanded}
+    >
+      <div className="flex items-center justify-between">
+        <div className="flex items-center gap-2">
+          <span className="transition-transform duration-200" style={{ transform: isExpanded ? 'rotate(90deg)' : 'rotate(0deg)' }}>
+            ▶
+          </span>
+          <h3 className="font-semibold">🔍 Détection d&apos;anomalies</h3>
+          {totalCount > 0 && (
+            <div className="flex gap-1">
+              {criticalCount > 0 && (
+                <Badge className="bg-red-100 text-red-800 text-xs">
+                  {criticalCount} critique{criticalCount > 1 ? 's' : ''}
+                </Badge>
+              )}
+              {highCount > 0 && (
+                <Badge className="bg-orange-100 text-orange-800 text-xs">
+                  {highCount} élevée{highCount > 1 ? 's' : ''}
+                </Badge>
+              )}
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}