Handle stage-voice-note and discard-voice-note IPC types.

Wire composer voice message staging through platform draft APIs.

Co-authored-by: Cursor <[email protected]>

index.js

@@ -1072,6 +1072,23 @@ async function dispatchUiMessage (platform, msg, hooks = {}) {
     pushState()
     return true
   }
+  if (t === 'stage-voice-note') {
+    const row = await platform.stageVoiceNoteDraft({
+      data: fromBase64(msg.dataBase64),
+      durationMs: msg.durationMs,
+      mimeType: msg.mimeType,
+      waveformPeaks: msg.waveformPeaks
+    })
+    send({ type: 'voice-note-staged', draft: row })
+    pushState()
+    return true
+  }
+  if (t === 'discard-voice-note') {
+    await platform.discardVoiceNoteDraft()
+    send({ type: 'voice-note-discarded' })
+    pushState()
+    return true
+  }
   if (t === 'stage-attachment') {
     const att = await platform.stageAttachment({
       data: fromBase64(msg.dataBase64),