refactor: use KpiStrip and StatusText in Dashboard page

Replace StatCard loop with KpiStrip composite, map KpiMetric mock data
to KpiItem interface. Remove unused .healthStrip CSS class.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/pages/Dashboard/Dashboard.module.css

@@ -7,14 +7,6 @@
   background: var(--bg-body);
 }
 
-/* Health strip */
-.healthStrip {
-  display: grid;
-  grid-template-columns: repeat(5, 1fr);
-  gap: 10px;
-  margin-bottom: 16px;
-}
-
 /* Filter bar spacing */
 .filterBar {
   margin-bottom: 16px;