feat(renderer): audio waveform player with WaveSurfer.js (M10.8)

- Lazy-loads WaveSurfer.js on first audio render
- Bitcoin orange waveform on dark background
- Click-to-seek, play/pause, time display
- Responsive width, touch-friendly

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/app/package.json

@@ -29,7 +29,8 @@
     "pinia": "^3.0.4",
     "plyr": "^3.8.4",
     "vue": "^3.5.29",
-    "vue-router": "^5.0.3"
+    "vue-router": "^5.0.3",
+    "wavesurfer.js": "^7.12.1"
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",

packages/app/src/components/renderers/AudioWaveform.vue

@@ -0,0 +1,111 @@
+<template>
+  <div class="audio-waveform rounded-xl bg-white/5 border border-white/10 overflow-hidden">
+    <div class="px-4 py-3 flex items-center gap-3">
+      <!-- Play/Pause -->
+      <button
+        class="w-10 h-10 flex items-center justify-center rounded-full bg-accent/15 text-accent hover:bg-accent/25 transition-colors shrink-0"
+        :disabled="loading"
+        @click="togglePlay"
+      >
+        <svg v-if="!isPlaying" class="w-4 h-4 ml-0.5" fill="currentColor" viewBox="0 0 20 20">
+          <path d="M6.3 2.841A1.5 1.5 0 004 4.11V15.89a1.5 1.5 0 002.3 1.269l9.344-5.89a1.5 1.5 0 000-2.538L6.3 2.84z" />
+        </svg>
+        <svg v-else class="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
+          <path d="M5.75 3a.75.75 0 00-.75.75v12.5c0 .414.336.75.75.75h1.5a.75.75 0 00.75-.75V3.75A.75.75 0 007.25 3h-1.5zM12.75 3a.75.75 0 00-.75.75v12.5c0 .414.336.75.75.75h1.5a.75.75 0 00.75-.75V3.75a.75.75 0 00-.75-.75h-1.5z" />
+        </svg>
+      </button>
+
+      <!-- Waveform container -->
+      <div class="flex-1 min-w-0">
+        <div ref="waveformRef" class="waveform-container" />
+        <div class="flex justify-between mt-1">
+          <span class="text-[10px] text-white/30 tabular-nums">{{ formatTime(currentTime) }}</span>
+          <span class="text-[10px] text-white/30 tabular-nums">{{ formatTime(duration) }}</span>
+        </div>
+      </div>
+    </div>
+
+    <div v-if="title" class="px-4 pb-3 -mt-1">
+      <p class="text-xs text-white/60 truncate">{{ title }}</p>
+    </div>
+
+    <div v-if="loading" class="px-4 pb-3">
+      <p class="text-[10px] text-white/30">Loading audio...</p>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted, onBeforeUnmount, shallowRef } from 'vue'
+
+const props = defineProps<{
+  url: string
+  title?: string
+}>()
+
+const waveformRef = ref<HTMLElement | null>(null)
+const isPlaying = ref(false)
+const currentTime = ref(0)
+const duration = ref(0)
+const loading = ref(true)
+
+type WaveSurferInstance = import('wavesurfer.js').default
+const ws = shallowRef<WaveSurferInstance | null>(null)
+
+async function initWaveSurfer() {
+  if (!waveformRef.value) return
+
+  const WaveSurfer = (await import('wavesurfer.js')).default
+
+  const instance = WaveSurfer.create({
+    container: waveformRef.value,
+    waveColor: '#F7931A44',
+    progressColor: '#F7931A',
+    cursorColor: '#F7931Acc',
+    barWidth: 2,
+    barGap: 1,
+    barRadius: 2,
+    height: 48,
+    normalize: true,
+    url: props.url,
+    backend: 'WebAudio',
+  })
+
+  instance.on('ready', () => {
+    loading.value = false
+    duration.value = instance.getDuration()
+  })
+
+  instance.on('timeupdate', (time: number) => {
+    currentTime.value = time
+  })
+
+  instance.on('play', () => { isPlaying.value = true })
+  instance.on('pause', () => { isPlaying.value = false })
+  instance.on('finish', () => { isPlaying.value = false })
+
+  instance.on('error', () => {
+    loading.value = false
+  })
+
+  ws.value = instance
+}
+
+function togglePlay() {
+  ws.value?.playPause()
+}
+
+function formatTime(seconds: number): string {
+  const m = Math.floor(seconds / 60)
+  const s = Math.floor(seconds % 60)
+  return `${m}:${s.toString().padStart(2, '0')}`
+}
+
+onMounted(() => {
+  initWaveSurfer()
+})
+
+onBeforeUnmount(() => {
+  ws.value?.destroy()
+})
+</script>

pnpm-lock.yaml

@@ -54,6 +54,9 @@ importers:
       vue-router:
         specifier: ^5.0.3
         version: 5.0.3(@vue/compiler-sfc@3.5.29)(pinia@3.0.4(typescript@5.8.3)(vue@3.5.29(typescript@5.8.3)))(vue@3.5.29(typescript@5.8.3))
+      wavesurfer.js:
+        specifier: ^7.12.1
+        version: 7.12.1
     devDependencies:
       '@eslint/js':
         specifier: ^10.0.1
@@ -3419,6 +3422,9 @@ packages:
       typescript:
         optional: true
 
+  wavesurfer.js@7.12.1:
+    resolution: {integrity: sha512-NswPjVHxk0Q1F/VMRemCPUzSojjuHHisQrBqQiRXg7MVbe3f5vQ6r0rTTXA/a/neC/4hnOEC4YpXca4LpH0SUg==}
+
   webidl-conversions@4.0.2:
     resolution: {integrity: sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==}
 
@@ -7028,6 +7034,8 @@ snapshots:
     optionalDependencies:
       typescript: 5.8.3
 
+  wavesurfer.js@7.12.1: {}
+
   webidl-conversions@4.0.2: {}
 
   webpack-virtual-modules@0.6.2: {}