Wave 6: CopyToolbar utilities and LogEntry row component

- Task #7: Create CopyToolbar and copy utilities
  (copy-utils.ts with text/JSON/CSV formatting, clipboard API with fallback)
  (CopyToolbar with copy all/selected, format dropdown, download export)
- Task #8: Create LogEntry row component
  (click-to-copy with visual feedback, expandable metrics view)
  (level/category badges, search highlighting, shift+click selection)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

web/app/globals.css

@@ -24,3 +24,19 @@ body {
   color: var(--foreground);
   font-family: Arial, Helvetica, sans-serif;
 }
+
+/* Custom animations */
+@keyframes fade-in {
+  from {
+    opacity: 0;
+    transform: translateX(-50%) translateY(4px);
+  }
+  to {
+    opacity: 1;
+    transform: translateX(-50%) translateY(0);
+  }
+}
+
+.animate-fade-in {
+  animation: fade-in 0.2s ease-out forwards;
+}