feat(tracker-web): overview MetricCard + ConfirmDialog delete (UX-2.2)

Replace the bespoke total-count card chrome with the shared MetricCard on
the dashboard overview (breakdown cards stay until the UX-4 chart swap),
and surface load errors via AlertBanner. Wrap the items-list delete
confirm() in the accessible ConfirmDialog (focus-trapped AlertDialog)
instead of the native browser prompt.

Generated with [Devin](https://cli.devin.ai/docs)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

dashboards/tracker-web/src/app/dashboard/items/page.tsx

@@ -12,6 +12,7 @@ import {
   Field,
   FieldLabel,
   Modal,
+  ConfirmDialog,
   StatusBadge,
   AlertBanner,
   type StatusTone,
@@ -60,6 +61,9 @@ export default function ItemsListPage() {
   const [newPriority, setNewPriority] = useState<'critical' | 'high' | 'medium' | 'low'>('medium');
   const [newDescription, setNewDescription] = useState('');
 
+  // Delete confirmation
+  const [deleteId, setDeleteId] = useState<string | null>(null);
+
   const fetchItems = useCallback(async () => {
     setLoading(true);
     setError('');
@@ -101,18 +105,19 @@ export default function ItemsListPage() {
     }
   };
 
-  const handleDelete = useCallback(
-    async (id: string) => {
-      if (!confirm('Delete this item?')) return;
-      try {
-        await deleteItem(id);
-        fetchItems();
-      } catch (err: unknown) {
-        setError(err instanceof Error ? err.message : 'Failed to delete');
-      }
-    },
-    [fetchItems]
-  );
+  const handleDelete = useCallback((id: string) => setDeleteId(id), []);
+
+  const confirmDelete = useCallback(async () => {
+    if (!deleteId) return;
+    try {
+      await deleteItem(deleteId);
+      setDeleteId(null);
+      fetchItems();
+    } catch (err: unknown) {
+      setDeleteId(null);
+      setError(err instanceof Error ? err.message : 'Failed to delete');
+    }
+  }, [deleteId, fetchItems]);
 
   const columns = useMemo<ColumnDef<TrackerItem, unknown>[]>(
     () => [
@@ -331,6 +336,18 @@ export default function ItemsListPage() {
           </div>
         </form>
       </Modal>
+
+      {/* Delete confirmation */}
+      <ConfirmDialog
+        open={deleteId !== null}
+        onOpenChange={open => {
+          if (!open) setDeleteId(null);
+        }}
+        title="Delete item"
+        description="Delete this item? This action cannot be undone."
+        confirmLabel="Delete"
+        onConfirm={confirmDelete}
+      />
     </div>
   );
 }

dashboards/tracker-web/src/app/dashboard/page.tsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useState } from 'react';
 import { PageHeader, LoadingSpinner } from '@bytelyst/dashboard-components';
+import { MetricCard, AlertBanner } from '@/components/ui/Primitives';
 import { useAuth } from '@/lib/auth-context';
 import { getStats, type TrackerStats } from '@/lib/tracker-client';
 
@@ -59,18 +60,19 @@ export default function DashboardOverview() {
       <p className="-mt-4 text-sm text-muted-foreground">Overview of all tracked items</p>
 
       {error && (
-        <div className="rounded-md bg-destructive/10 px-4 py-3 text-sm text-destructive">
+        <AlertBanner tone="error" title="Something went wrong">
           {error}
-        </div>
+        </AlertBanner>
       )}
 
       {stats ? (
         <div className="space-y-4">
           {/* Total count */}
-          <div className="rounded-xl border border-border bg-card p-6">
-            <div className="text-4xl font-bold">{stats.total}</div>
-            <div className="text-sm text-muted-foreground">Total items for {stats.productId}</div>
-          </div>
+          <MetricCard
+            label={`Total items for ${stats.productId}`}
+            value={stats.total}
+            helper="All tracked items"
+          />
 
           {/* Breakdown cards */}
           <div className="grid gap-4 md:grid-cols-3">