Add refresh button

src/theme.css

@@ -437,4 +437,49 @@ mark {
   .search-input {
     max-width: 100%;
   }
+}
+
+/* ============================================
+   Loading & Spinner
+   ============================================ */
+
+@keyframes spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.spinning {
+  animation: spin 1s linear infinite;
+}
+
+.loading-container {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 60px 20px;
+  color: var(--text-secondary);
+}
+
+.loading-container p {
+  margin-top: 16px;
+  font-size: 14px;
+}
+
+.loading-spinner {
+  font-size: 48px;
+}
+
+.icon-button:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.icon-button:disabled:hover {
+  background-color: var(--bg-input);
+  border-color: var(--border-color-light);
 }