feat(stats): add library entry deletion and app-wide delete progress (#174)

stats/src/styles/globals.css

@@ -80,7 +80,7 @@ body.overlay-mode #root {
 }
 
 /* Tab content entrance animation */
-@keyframes fadeSlideIn {
+@keyframes fade-slide-in {
   from {
     opacity: 0;
     transform: translateY(6px);
@@ -92,5 +92,39 @@ body.overlay-mode #root {
 }
 
 .animate-fade-in {
-  animation: fadeSlideIn 0.25s ease-out;
+  animation: fade-slide-in 0.25s ease-out;
+}
+
+/* Indeterminate progress sweep for the global delete indicator */
+@keyframes indeterminate-sweep {
+  from {
+    transform: translateX(-100%);
+  }
+  to {
+    transform: translateX(400%);
+  }
+}
+
+.animate-indeterminate {
+  animation: indeterminate-sweep 1.1s ease-in-out infinite;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .animate-fade-in {
+    animation-duration: 1ms;
+  }
+
+  /* Looping motion can't just be shortened the way a one-shot entrance can —
+     that speeds it up rather than removing it. The delete indicator holds a
+     static busy state instead: the bar fills its track and the spinner stops,
+     leaving the toast text to carry the meaning. */
+  .animate-indeterminate {
+    animation: none;
+    width: 100%;
+    transform: none;
+  }
+
+  .animate-spin {
+    animation: none;
+  }
 }