feat(voice): add spoken summary mode for conversation replies

packages/ui/src/lib/api-client.ts

@@ -11,6 +11,7 @@ import type {
   SpeechSynthesisResponse,
   SpeechTranscriptionResponse,
   ServerMeta,
+  VoiceModeStateResponse,
   WorkspaceCreateRequest,
   WorkspaceDescriptor,
   WorkspaceFileResponse,
@@ -348,6 +349,12 @@ export const serverApi = {
       { method: "POST" },
     )
   },
+  updateVoiceMode(instanceId: string, enabled: boolean): Promise<VoiceModeStateResponse> {
+    return request<VoiceModeStateResponse>(`/workspaces/${encodeURIComponent(instanceId)}/plugin/voice-mode`, {
+      method: "POST",
+      body: JSON.stringify({ enabled }),
+    })
+  },
   fetchBackgroundProcessOutput(
     instanceId: string,
     processId: string,

packages/ui/src/stores/conversation-speech.ts

@@ -30,6 +30,7 @@ interface PlaybackHandle {
 
 const log = getLogger("actions")
 const [conversationModeInstances, setConversationModeInstances] = createSignal<Map<string, boolean>>(new Map())
+const LEADING_SPOKEN_BLOCK_REGEX = /^\s*```spoken[ \t]*\r?\n([\s\S]*?)\r?\n```(?:\r?\n|$)/i
 
 const queuedKeys = new Set<string>()
 const spokenKeysBySession = new Map<string, Set<string>>()
@@ -107,6 +108,9 @@ export function canUseConversationMode(): boolean {
 }
 
 export function setConversationModeEnabled(instanceId: string, enabled: boolean): void {
+  const previous = isConversationModeEnabled(instanceId)
+  if (previous === enabled) return
+
   setConversationModeInstances((prev) => {
     const next = new Map(prev)
     if (enabled) {
@@ -120,6 +124,23 @@ export function setConversationModeEnabled(instanceId: string, enabled: boolean)
   if (!enabled) {
     clearConversationPlaybackForInstance(instanceId)
   }
+
+  void serverApi.updateVoiceMode(instanceId, enabled).catch((error) => {
+    log.error("Failed to update conversation mode", error)
+    setConversationModeInstances((prev) => {
+      const next = new Map(prev)
+      if (previous) {
+        next.set(instanceId, true)
+      } else {
+        next.delete(instanceId)
+      }
+      return next
+    })
+
+    if (!previous) {
+      clearConversationPlaybackForInstance(instanceId)
+    }
+  })
 }
 
 export function toggleConversationMode(instanceId: string): void {
@@ -188,7 +209,7 @@ export function handleConversationAssistantPartUpdated(instanceId: string, part:
   if (!isConversationModeEnabled(instanceId)) return
   if (!isSpeakableSession(instanceId, sessionId)) return
 
-  const text = resolveTextPartContent(part).trim()
+  const text = extractLeadingSpokenBlock(resolveTextPartContent(part))
   if (!text) return
 
   const key = getEntryKey(instanceId, sessionId, messageId, partId)
@@ -505,3 +526,9 @@ function createObjectUrlFromBase64(audioBase64: string, mimeType: string): strin
   }
   return URL.createObjectURL(new Blob([bytes], { type: mimeType || "audio/mpeg" }))
 }
+
+function extractLeadingSpokenBlock(text: string): string {
+  const match = text.match(LEADING_SPOKEN_BLOCK_REGEX)
+  if (!match?.[1]) return ""
+  return match[1].trim()
+}