feat: add restart button to player panel to seek to the beginning of the track

frontend/src/components/PlayerPanel.vue

@@ -7,6 +7,7 @@ import {
   Play,
   Repeat,
   Repeat1,
+  RotateCcw,
   SkipForward,
   Square,
   Volume,
@@ -131,6 +132,18 @@ async function commitSeek() {
   }
 }
 
+async function restartCurrent() {
+  if (!current.value || duration.value <= 0 || seekSubmitting.value) return
+  seekPosition.value = 0
+  seekSubmitting.value = true
+  try {
+    await run(() => api.seek(0), 'Uruchomiono utwór od początku', 'Błąd uruchamiania od początku')
+  } finally {
+    seekSubmitting.value = false
+    seeking.value = false
+  }
+}
+
 const skip = () => run(() => api.skip(), 'Pominięto utwór', 'Błąd pomijania utworu')
 
 const stop = () =>
@@ -248,6 +261,14 @@ async function cycleLoop() {
       >
         <Square />
       </button>
+      <button
+        class="btn-icon btn-secondary"
+        :disabled="!current || duration <= 0 || seekSubmitting"
+        title="Od początku"
+        @click="restartCurrent"
+      >
+        <RotateCcw />
+      </button>
       <button
         class="btn-icon btn-primary"
         :disabled="!current"
@@ -299,4 +320,10 @@ async function cycleLoop() {
   background: var(--primary);
   color: var(--bg-card, var(--bg-dark));
 }
+
+.btn-icon:disabled {
+  opacity: 0.35;
+  cursor: not-allowed;
+  transform: none;
+}
 </style>