feat: add BETA label and UI improvements for TeleCart Pulse tab

- Add BETA badge to TeleCart Pulse tab in navigation
- Implement pulsing heartbeat animation for pulse icon
- Add dynamic color change for icon (light red when inactive, bright red when active)
- Add dynamic color change for BETA label (light orange when inactive, bright orange when active)
- Add informational block about TeleCart Pulse in TeleCartPulseView component
- Update App.vue with pulse icon animation and styling
- Update TeleCartPulseView.vue with info block and styling

frontend/admin/src/App.vue

@@ -58,7 +58,7 @@
 
       <li :class="{active: route.name === 'pulse'}">
         <RouterLink :to="{name: 'pulse'}">
-          <i class="fa fa-heartbeat"></i> TeleCart Pulse
+          <i class="fa fa-heartbeat pulse-icon tw:text-red-200"></i> TeleCart Pulse <span class="pulse-beta-label tw:ml-1 tw:px-1.5 tw:py-0.5 tw:text-xs tw:font-semibold tw:text-white tw:rounded">BETA</span>
         </RouterLink>
       </li>
 
@@ -152,5 +152,36 @@ onBeforeUnmount(() => {
 
 
 <style scoped>
+@keyframes heartbeat {
+  0%, 100% {
+    transform: scale(1);
+  }
+  10%, 30% {
+    transform: scale(1.1);
+  }
+  20%, 40% {
+    transform: scale(1);
+  }
+  50% {
+    transform: scale(1.15);
+  }
+}
 
+.pulse-icon {
+  animation: heartbeat 1.5s ease-in-out infinite;
+  display: inline-block;
+}
+
+.nav-tabs li.active .pulse-icon {
+  color: #ef4444; /* red-500 */
+}
+
+.pulse-beta-label {
+  background-color: #fdba74; /* orange-300 - тусклый */
+  transition: background-color 0.2s ease;
+}
+
+.nav-tabs li.active .pulse-beta-label {
+  background-color: #f97316; /* orange-500 - яркий */
+}
 </style>