fix: resolve multiple UI issues in player, playlist, lyrics, and queue

- Playlist: add console.error in catch block so load failures are visible
- Player: add progress bar with requestAnimationFrame and time display
- Player: extract toggleQueue function with debug logging for queue panel
- WebSocket: fetch queue on stateChange when not included in event payload
- Lyrics: use CSS transform scrolling and reduce sync to 500ms to fix flicker

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/src/components/Player.vue

@@ -1,5 +1,25 @@
 <template>
   <div class="player-bar frosted-glass" v-if="currentSong">
+    <!-- Progress bar -->
+    <div
+      class="progress-bar-container"
+      ref="progressBarRef"
+      @mousedown="onProgressMouseDown"
+      @mousemove="onProgressHover"
+      @mouseleave="progressTooltipVisible = false"
+    >
+      <div class="progress-bar-bg">
+        <div class="progress-bar-fill" :style="{ width: progressPercent + '%' }" />
+      </div>
+      <div
+        v-if="progressTooltipVisible"
+        class="progress-tooltip"
+        :style="{ left: progressTooltipX + 'px' }"
+      >
+        {{ progressTooltipTime }}
+      </div>
+    </div>
+
     <div class="player-left">
       <CoverArt :url="currentSong.coverUrl" :size="40" />
       <div class="song-info">
@@ -9,6 +29,7 @@
     </div>
 
     <div class="player-center">
+      <span class="time-display time-current">{{ formatTime(currentElapsed) }}</span>
       <button class="control-btn" @click="store.prev()">
         <Icon icon="mdi:skip-previous" />
       </button>
@@ -22,6 +43,7 @@
         <Icon :icon="modeIcon" />
         <span class="mode-label">{{ modeLabel }}</span>
       </button>
+      <span class="time-display time-total">{{ formatTime(currentSong?.duration ?? 0) }}</span>
     </div>
 
     <div class="player-right">
@@ -34,7 +56,7 @@
         @input="onVolumeChange"
         class="volume-slider"
       />
-      <button class="control-btn" @click="showQueue = !showQueue">
+      <button class="control-btn" @click="toggleQueue">
         <Icon icon="mdi:playlist-music" />
       </button>
       <RouterLink to="/lyrics" class="control-btn lyrics-btn">
@@ -46,7 +68,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, ref } from 'vue';
+import { computed, ref, onMounted, onUnmounted } from 'vue';
 import { Icon } from '@iconify/vue';
 import { usePlayerStore } from '../stores/player.js';
 import CoverArt from './CoverArt.vue';
@@ -58,6 +80,65 @@ const store = usePlayerStore();
 const activeBot = computed(() => store.activeBot);
 const currentSong = computed(() => store.currentSong);
 
+// Progress bar state
+const progressBarRef = ref<HTMLElement | null>(null);
+const currentElapsed = ref(0);
+const progressPercent = ref(0);
+const progressTooltipVisible = ref(false);
+const progressTooltipX = ref(0);
+const progressTooltipTime = ref('0:00');
+let rafId: number | null = null;
+
+function formatTime(seconds: number): string {
+  if (!seconds || seconds < 0) return '0:00';
+  const m = Math.floor(seconds / 60);
+  const s = Math.floor(seconds % 60);
+  return `${m}:${s.toString().padStart(2, '0')}`;
+}
+
+function updateProgress() {
+  const elapsed = store.elapsed;
+  const duration = currentSong.value?.duration ?? 0;
+  currentElapsed.value = elapsed;
+  progressPercent.value = duration > 0 ? Math.min((elapsed / duration) * 100, 100) : 0;
+  rafId = requestAnimationFrame(updateProgress);
+}
+
+function onProgressMouseDown(e: MouseEvent) {
+  const bar = progressBarRef.value;
+  if (!bar) return;
+  const rect = bar.getBoundingClientRect();
+  const ratio = Math.max(0, Math.min(1, (e.clientX - rect.left) / rect.width));
+  const duration = currentSong.value?.duration ?? 0;
+  // Visual-only seek (server-side seeking not supported)
+  progressPercent.value = ratio * 100;
+  progressTooltipTime.value = formatTime(ratio * duration);
+}
+
+function onProgressHover(e: MouseEvent) {
+  const bar = progressBarRef.value;
+  if (!bar) return;
+  const rect = bar.getBoundingClientRect();
+  const ratio = Math.max(0, Math.min(1, (e.clientX - rect.left) / rect.width));
+  const duration = currentSong.value?.duration ?? 0;
+  progressTooltipVisible.value = true;
+  progressTooltipX.value = e.clientX - rect.left;
+  progressTooltipTime.value = formatTime(ratio * duration);
+}
+
+onMounted(() => {
+  rafId = requestAnimationFrame(updateProgress);
+});
+
+onUnmounted(() => {
+  if (rafId !== null) cancelAnimationFrame(rafId);
+});
+
+function toggleQueue() {
+  showQueue.value = !showQueue.value;
+  console.log('Queue panel toggled:', showQueue.value);
+}
+
 function togglePlay() {
   if (store.isPlaying) {
     store.pause();
@@ -110,6 +191,65 @@ function cycleMode() {
   border-top: 1px solid var(--border-color);
 }
 
+.progress-bar-container {
+  position: absolute;
+  top: -4px;
+  left: 0;
+  right: 0;
+  height: 8px;
+  cursor: pointer;
+  z-index: 101;
+  display: flex;
+  align-items: flex-end;
+
+  &:hover {
+    .progress-bar-bg { height: 4px; }
+    .progress-bar-fill { height: 4px; }
+  }
+}
+
+.progress-bar-bg {
+  width: 100%;
+  height: 2px;
+  background: var(--border-color);
+  transition: height 0.15s ease;
+  position: relative;
+}
+
+.progress-bar-fill {
+  position: absolute;
+  top: 0;
+  left: 0;
+  height: 100%;
+  background: var(--color-primary);
+  border-radius: 0 1px 1px 0;
+  transition: height 0.15s ease;
+}
+
+.progress-tooltip {
+  position: absolute;
+  top: -28px;
+  transform: translateX(-50%);
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  padding: 2px 8px;
+  font-size: 11px;
+  color: var(--text-secondary);
+  white-space: nowrap;
+  pointer-events: none;
+}
+
+.time-display {
+  font-size: 11px;
+  color: var(--text-tertiary);
+  font-variant-numeric: tabular-nums;
+  min-width: 36px;
+}
+
+.time-current { text-align: right; }
+.time-total { text-align: left; }
+
 .player-left {
   display: flex;
   align-items: center;

web/src/composables/useWebSocket.ts

@@ -29,7 +29,12 @@ export function useWebSocket() {
           break;
         case 'stateChange':
           store.updateBotStatus(data.botId, data.status);
-          if (data.queue) store.setQueue(data.queue);
+          if (data.queue) {
+            store.setQueue(data.queue);
+          } else {
+            // Queue not included in event; refresh it
+            store.fetchQueue();
+          }
           break;
         case 'botConnected':
           store.updateBotStatus(data.botId, data.status);

web/src/views/Lyrics.vue

@@ -19,6 +19,7 @@
         <div v-if="loading" class="lyrics-loading">加载歌词中...</div>
         <div v-else-if="lines.length === 0" class="lyrics-empty">暂无歌词</div>
         <div v-else class="lyrics-scroll" ref="scrollContainer">
+          <div class="lyrics-inner" :style="{ transform: `translateY(${scrollOffset}px)`, transition: 'transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1)' }">
             <div class="lyrics-spacer" />
             <div
               v-for="(line, i) in lines"
@@ -35,6 +36,7 @@
           </div>
         </div>
       </div>
+    </div>
 
     <div v-else class="no-song">
       当前没有正在播放的歌曲
@@ -63,6 +65,7 @@ const activeLine = ref(-1);
 const loading = ref(false);
 const scrollContainer = ref<HTMLElement | null>(null);
 const lineRefs = ref<Record<number, HTMLElement>>({});
+const scrollOffset = ref(0);
 let syncTimer: ReturnType<typeof setInterval> | null = null;
 
 const bgStyle = computed(() => {
@@ -113,23 +116,19 @@ function scrollToActiveLine(idx: number) {
   const container = scrollContainer.value;
   if (!el || !container) return;
 
-  // Calculate target scroll position to center the active line
+  // Use CSS transform for smooth, jank-free scrolling
   const containerHeight = container.clientHeight;
   const lineTop = el.offsetTop;
   const lineHeight = el.offsetHeight;
-  const targetScroll = lineTop - containerHeight / 2 + lineHeight / 2;
-
-  // Smooth scroll using CSS scroll-behavior or manual animation
-  container.scrollTo({
-    top: targetScroll,
-    behavior: 'smooth',
-  });
+  const targetOffset = -(lineTop - containerHeight / 2 + lineHeight / 2);
+  scrollOffset.value = targetOffset;
 }
 
 function syncLyrics() {
   if (!store.isPlaying || lines.value.length === 0) return;
   const elapsed = store.elapsed;
   const idx = findActiveLine(elapsed);
+  // Only update when the active line actually changes
   if (idx !== activeLine.value && idx >= 0) {
     activeLine.value = idx;
     scrollToActiveLine(idx);
@@ -139,11 +138,12 @@ function syncLyrics() {
 function seekToLine(index: number) {
   // Can't actually seek server-side playback, just highlight
   activeLine.value = index;
+  scrollToActiveLine(index);
 }
 
 function startSync() {
   stopSync();
-  syncTimer = setInterval(syncLyrics, 200);
+  syncTimer = setInterval(syncLyrics, 500);
 }
 
 function stopSync() {
@@ -260,9 +260,12 @@ onUnmounted(() => {
 
 .lyrics-scroll {
   height: 100%;
-  overflow-y: auto;
-  scrollbar-width: none;
-  &::-webkit-scrollbar { display: none; }
+  overflow: hidden;
+  position: relative;
+}
+
+.lyrics-inner {
+  will-change: transform;
 }
 
 .lyrics-spacer {

web/src/views/Playlist.vue

@@ -96,8 +96,10 @@ onMounted(async () => {
     ]);
     playlist.value = detailRes.data.playlist;
     songs.value = songsRes.data.songs;
-  } catch {
-    // Ignore if API not ready
+  } catch (err) {
+    console.error('Failed to load playlist:', err);
+    playlist.value = null;
+    songs.value = [];
   } finally {
     loading.value = false;
   }