Initial commit: add .gitignore and README

frontend/src/hooks/useVoicePlayback.ts

@@ -0,0 +1,30 @@
+import { useState, useCallback } from "react"
+
+export function useVoicePlayback() {
+  const [speakingHead, setSpeakingHead] = useState<string | null>(null)
+  const [headSummaries, setHeadSummaries] = useState<Record<string, string>>({})
+
+  const onHeadSpeak = useCallback(
+    (headId: string, summary: string, audioBase64?: string | null) => {
+      setSpeakingHead(headId)
+      setHeadSummaries((prev) => ({ ...prev, [headId]: summary }))
+      if (audioBase64) {
+        try {
+          const audio = new Audio(`data:audio/wav;base64,${audioBase64}`)
+          audio.play().then(() => {
+            audio.onended = () => setSpeakingHead(null)
+          }).catch(() => setSpeakingHead(null))
+        } catch {
+          setSpeakingHead(null)
+        }
+      } else {
+        setTimeout(() => setSpeakingHead(null), 1500)
+      }
+    },
+    []
+  )
+
+  const clearSpeaking = useCallback(() => setSpeakingHead(null), [])
+
+  return { speakingHead, headSummaries, onHeadSpeak, clearSpeaking }
+}