From 3805c18622454666d583bc7450f40d10cd254bef Mon Sep 17 00:00:00 2001
From: torin <yuyan@duck.com>
Date: Fri, 24 Apr 2026 17:58:49 +0800
Subject: [PATCH] feat: add ASR provider support for voice co-creation

---
 README.md                                     |   7 +-
 admin-frontend/src/views/AdminProviders.vue   |  14 ++-
 backend/.env.example                          |   5 +
 backend/app/api/admin_providers.py            |   2 +-
 backend/app/core/config.py                    |   5 +-
 backend/app/db/admin_models.py                |   4 +-
 backend/app/services/adapters/__init__.py     |   6 +-
 backend/app/services/adapters/asr/__init__.py |   1 +
 backend/app/services/adapters/asr/demo.py     |  57 +++++++++
 backend/app/services/adapters/asr/models.py   |  11 ++
 backend/app/services/adapters/asr/openai.py   |  76 +++++++++++
 backend/app/services/provider_policy.py       |  13 +-
 backend/app/services/provider_router.py       |  48 ++++++-
 backend/app/services/voice_session_service.py |   2 +
 .../services/voice_transcription_service.py   | 119 ++++--------------
 backend/tests/test_provider_router.py         |  22 +++-
 docs/planning/demo-checklist.md               |  36 +++++-
 docs/planning/demo-validation-log.md          |  42 +++++++
 .../voice-co-creation-mode-incremental-prd.md |  51 ++++++--
 .../voice-co-creation-phase-a-tech-spec.md    |   4 +-
 frontend/src/views/AdminProviders.vue         |   2 +-
 scripts/demo_smoke.sh                         |  70 ++++++++++-
 22 files changed, 471 insertions(+), 126 deletions(-)
 create mode 100644 backend/app/services/adapters/asr/__init__.py
 create mode 100644 backend/app/services/adapters/asr/demo.py
 create mode 100644 backend/app/services/adapters/asr/models.py
 create mode 100644 backend/app/services/adapters/asr/openai.py

diff --git a/README.md b/README.md
index 90a259c..5e9c18d 100644
--- a/README.md
+++ b/README.md
@@ -63,11 +63,14 @@ docker compose ps
 docker compose logs -f backend
 ./scripts/demo_smoke.sh
 SMOKE_AUDIO=1 ./scripts/demo_smoke.sh
+SMOKE_VOICE=1 ./scripts/demo_smoke.sh
 docker compose down
 docker compose down -v
 ```
 
-`scripts/demo_smoke.sh` 会检查健康状态、本地登录、统一生成后台任务、主记录落库、资产重试、故事列表和 Provider 能力分层。默认跳过 TTS；演示前需要验证语音链路时使用 `SMOKE_AUDIO=1`。
+`scripts/demo_smoke.sh` 会检查健康状态、本地登录、统一生成后台任务、主记录落库、资产重试、故事列表和 Provider 能力分层。默认跳过 TTS 和语音共创；演示前需要验证朗读链路时使用 `SMOKE_AUDIO=1`，需要验证 Voice Studio Alpha 时使用 `SMOKE_VOICE=1`。
+
+语音共创的 ASR 能力已纳入 Provider 分层。默认 `ASR_PROVIDERS=["demo"]` 会使用 `transcript_hint` 或文本上传作为本地演示转写；需要真实转写时可设置 `ASR_PROVIDERS=["openai_asr", "demo"]` 并配置 `OPENAI_API_KEY`。
 
 ## 手动开发
 
@@ -142,7 +145,7 @@ npm run build
 | GET | `/api/stories/{story_id}` | 故事详情 |
 | DELETE | `/api/stories/{story_id}` | 删除故事 |
 | GET/POST/PUT/DELETE | `/admin/providers` | Provider 管理，需开启管理后台 |
-| GET | `/admin/providers/capabilities` | Provider 能力分层说明，需开启管理后台 |
+| GET | `/admin/providers/capabilities` | Provider 能力分层说明（text/image/tts/storybook/asr），需开启管理后台 |
 
 ## 文档入口
 
diff --git a/admin-frontend/src/views/AdminProviders.vue b/admin-frontend/src/views/AdminProviders.vue
index a2db1e1..e4e7bbb 100644
--- a/admin-frontend/src/views/AdminProviders.vue
+++ b/admin-frontend/src/views/AdminProviders.vue
@@ -109,6 +109,14 @@
               >
                 绘本
               </button>
+              <button
+                type="button"
+                class="rounded-lg border px-3 py-1.5 text-sm transition-colors"
+                :class="analyticsCapability === 'asr' ? 'border-indigo-600 bg-indigo-600 text-white' : 'border-gray-200 bg-white text-gray-600 hover:border-gray-400'"
+                @click="analyticsCapability = 'asr'"
+              >
+                语音识别
+              </button>
             </div>
           </div>
 
@@ -316,7 +324,7 @@
           <!-- Tabs -->
           <div class="flex space-x-1 bg-gray-100 p-1 rounded-xl w-fit">
             <button
-              v-for="tab in ['text', 'image', 'tts', 'storybook']"
+              v-for="tab in ['text', 'image', 'tts', 'storybook', 'asr']"
               :key="tab"
               @click="activeTab = tab"
               class="px-6 py-2 rounded-lg text-sm font-medium transition-all duration-200"
@@ -593,7 +601,7 @@ const analytics = ref<ProviderAnalyticsResponse | null>(null)
 const analyticsLoading = ref(false)
 const analyticsError = ref('')
 const analyticsWindow = ref<'7' | '30' | 'all'>('30')
-const analyticsCapability = ref<'all' | 'text' | 'image' | 'tts' | 'storybook'>('all')
+const analyticsCapability = ref<'all' | 'text' | 'image' | 'tts' | 'storybook' | 'asr'>('all')
 const editing = ref(false)
 const form = ref<Partial<Provider> & { api_key?: string; config_json: Record<string, any> }>({
   type: 'text',
@@ -638,6 +646,8 @@ function formatCapability(value: string) {
       return '语音'
     case 'storybook':
       return '绘本'
+    case 'asr':
+      return '语音识别'
     default:
       return value
   }
diff --git a/backend/.env.example b/backend/.env.example
index 20c7887..a54306a 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -43,6 +43,8 @@ IMAGE_PROVIDERS=["cqtai"]
 TTS_PROVIDERS=["minimax", "elevenlabs", "edge_tts"]
 # 绘本结构生成: 默认复用 Gemini Storybook adapter
 STORYBOOK_PROVIDERS=["storybook_primary"]
+# 语音识别: 本地演示默认 demo；真实转写可设置为 ["openai_asr", "demo"]
+ASR_PROVIDERS=["demo"]
 
 # [模型参数]
 TEXT_MODEL=gemini-2.0-flash
@@ -82,6 +84,9 @@ ELEVENLABS_API_KEY=
 # OpenAI (如需使用)
 OPENAI_API_KEY=
 OPENAI_API_BASE=
+# OpenAI ASR
+VOICE_TRANSCRIPTION_MODEL=gpt-4o-mini-transcribe
+VOICE_TRANSCRIPTION_LANGUAGE=zh
 
 # ----------------------------------------------
 # 3. 第三方登录 (OAuth Config) [可选]
diff --git a/backend/app/api/admin_providers.py b/backend/app/api/admin_providers.py
index 1a1c7cb..2511ef5 100644
--- a/backend/app/api/admin_providers.py
+++ b/backend/app/api/admin_providers.py
@@ -17,7 +17,7 @@ router = APIRouter(dependencies=[Depends(admin_guard)])
 
 class ProviderCreate(BaseModel):
     name: str
-    type: str = Field(..., pattern="^(text|image|tts|storybook)$")
+    type: str = Field(..., pattern="^(text|image|tts|storybook|asr)$")
     adapter: str
     model: str | None = None
     api_base: str | None = None
diff --git a/backend/app/core/config.py b/backend/app/core/config.py
index a8cd562..f5ca937 100644
--- a/backend/app/core/config.py
+++ b/backend/app/core/config.py
@@ -58,6 +58,7 @@ class Settings(BaseSettings):
     image_providers: list[str] = Field(default_factory=lambda: ["cqtai"])
     tts_providers: list[str] = Field(default_factory=lambda: ["minimax", "elevenlabs", "edge_tts"])
     storybook_providers: list[str] = Field(default_factory=lambda: ["storybook_primary"])
+    asr_providers: list[str] = Field(default_factory=lambda: ["demo"])
     enable_demo_providers: bool = Field(
         False,
         description="Enable local deterministic demo providers for portfolio demos",
@@ -71,8 +72,8 @@ class Settings(BaseSettings):
         description="Directory for persisted voice co-creation session assets",
     )
     voice_transcription_mode: str = Field(
-        "demo",
-        description="Voice transcription mode: demo, openai, or disabled",
+        "provider",
+        description="Voice transcription mode: provider or disabled; provider order is controlled by ASR_PROVIDERS",
     )
     voice_transcription_model: str = Field(
         "gpt-4o-mini-transcribe",
diff --git a/backend/app/db/admin_models.py b/backend/app/db/admin_models.py
index ea8dfc7..169291b 100644
--- a/backend/app/db/admin_models.py
+++ b/backend/app/db/admin_models.py
@@ -19,7 +19,7 @@ class Provider(Base):
 
     id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid)
     name: Mapped[str] = mapped_column(String(100), nullable=False)
-    type: Mapped[str] = mapped_column(String(50), nullable=False)  # text/image/tts/storybook
+    type: Mapped[str] = mapped_column(String(50), nullable=False)  # text/image/tts/storybook/asr
     adapter: Mapped[str] = mapped_column(String(100), nullable=False)
     model: Mapped[str] = mapped_column(String(200), nullable=True)
     api_base: Mapped[str] = mapped_column(String(300), nullable=True)
@@ -97,7 +97,7 @@ class CostRecord(Base):
     user_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
     provider_id: Mapped[str] = mapped_column(String(36), nullable=True)  # 可能是环境变量配置
     provider_name: Mapped[str] = mapped_column(String(100), nullable=False)
-    capability: Mapped[str] = mapped_column(String(50), nullable=False)  # text/image/tts/storybook
+    capability: Mapped[str] = mapped_column(String(50), nullable=False)  # text/image/tts/storybook/asr
     estimated_cost: Mapped[Decimal] = mapped_column(Numeric(10, 6), nullable=False)
     timestamp: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), default=datetime.utcnow, index=True
diff --git a/backend/app/services/adapters/__init__.py b/backend/app/services/adapters/__init__.py
index 6af2c4f..0ed81dd 100644
--- a/backend/app/services/adapters/__init__.py
+++ b/backend/app/services/adapters/__init__.py
@@ -4,7 +4,11 @@
 from app.services.adapters import demo as _demo_adapters  # noqa: F401
 from app.services.adapters.base import AdapterConfig, BaseAdapter
 
-# Image adapters
+# ASR adapters
+from app.services.adapters.asr import demo as _asr_demo_adapter  # noqa: F401
+from app.services.adapters.asr import openai as _asr_openai_adapter  # noqa: F401
+
+# Image adapters
 from app.services.adapters.image import cqtai as _image_cqtai_adapter  # noqa: F401
 from app.services.adapters.registry import AdapterRegistry
 
diff --git a/backend/app/services/adapters/asr/__init__.py b/backend/app/services/adapters/asr/__init__.py
new file mode 100644
index 0000000..9500723
--- /dev/null
+++ b/backend/app/services/adapters/asr/__init__.py
@@ -0,0 +1 @@
+"""ASR adapters."""
diff --git a/backend/app/services/adapters/asr/demo.py b/backend/app/services/adapters/asr/demo.py
new file mode 100644
index 0000000..7478450
--- /dev/null
+++ b/backend/app/services/adapters/asr/demo.py
@@ -0,0 +1,57 @@
+"""Demo ASR adapter for local voice co-creation smoke tests."""
+
+from __future__ import annotations
+
+from fastapi import HTTPException
+
+from app.services.adapters.asr.models import TranscriptionOutput
+from app.services.adapters.base import BaseAdapter
+from app.services.adapters.registry import AdapterRegistry
+
+
+@AdapterRegistry.register("asr", "demo")
+class DemoASRAdapter(BaseAdapter[TranscriptionOutput]):
+    """Return transcript hints or text uploads without external ASR services."""
+
+    adapter_type = "asr"
+    adapter_name = "demo"
+
+    async def execute(
+        self,
+        audio_bytes: bytes,
+        file_name: str | None = None,
+        mime_type: str | None = None,
+        transcript_hint: str | None = None,
+        **kwargs,
+    ) -> TranscriptionOutput:
+        hint = (transcript_hint or "").strip()
+        if hint:
+            return TranscriptionOutput(
+                transcript_text=hint,
+                confidence=1.0,
+                provider=self.adapter_name,
+            )
+
+        if mime_type and mime_type.startswith("text/"):
+            text = audio_bytes.decode("utf-8", errors="ignore").strip()
+            if text:
+                return TranscriptionOutput(
+                    transcript_text=text,
+                    confidence=1.0,
+                    provider=self.adapter_name,
+                )
+
+        raise HTTPException(
+            status_code=503,
+            detail=(
+                "当前环境未配置真实语音转写，请先使用文本共创模式，"
+                "或在开发模式下提供 transcript_hint。"
+            ),
+        )
+
+    async def health_check(self) -> bool:
+        return True
+
+    @property
+    def estimated_cost(self) -> float:
+        return 0.0
diff --git a/backend/app/services/adapters/asr/models.py b/backend/app/services/adapters/asr/models.py
new file mode 100644
index 0000000..77aff1e
--- /dev/null
+++ b/backend/app/services/adapters/asr/models.py
@@ -0,0 +1,11 @@
+"""ASR adapter result models."""
+
+from pydantic import BaseModel
+
+
+class TranscriptionOutput(BaseModel):
+    """Normalized speech-to-text output from one ASR provider."""
+
+    transcript_text: str
+    confidence: float | None = None
+    provider: str
diff --git a/backend/app/services/adapters/asr/openai.py b/backend/app/services/adapters/asr/openai.py
new file mode 100644
index 0000000..7478c36
--- /dev/null
+++ b/backend/app/services/adapters/asr/openai.py
@@ -0,0 +1,76 @@
+"""OpenAI ASR adapter."""
+
+from __future__ import annotations
+
+from io import BytesIO
+
+from fastapi import HTTPException
+from openai import AsyncOpenAI
+
+from app.core.logging import get_logger
+from app.services.adapters.asr.models import TranscriptionOutput
+from app.services.adapters.base import BaseAdapter
+from app.services.adapters.registry import AdapterRegistry
+
+logger = get_logger(__name__)
+
+
+@AdapterRegistry.register("asr", "openai_asr")
+class OpenAIASRAdapter(BaseAdapter[TranscriptionOutput]):
+    """Transcribe uploaded voice turn audio with OpenAI audio transcription."""
+
+    adapter_type = "asr"
+    adapter_name = "openai_asr"
+
+    async def execute(
+        self,
+        audio_bytes: bytes,
+        file_name: str | None = None,
+        mime_type: str | None = None,
+        transcript_hint: str | None = None,
+        language: str | None = None,
+        **kwargs,
+    ) -> TranscriptionOutput:
+        if not self.config.api_key:
+            raise HTTPException(
+                status_code=503,
+                detail="OPENAI_API_KEY 未配置，无法使用 OpenAI 语音转写。",
+            )
+
+        client = AsyncOpenAI(api_key=self.config.api_key)
+        audio_file = BytesIO(audio_bytes)
+        audio_file.name = file_name or "voice-turn.webm"
+
+        prompt = transcript_hint.strip() if transcript_hint else None
+        model = self.config.model or "gpt-4o-mini-transcribe"
+
+        try:
+            response = await client.audio.transcriptions.create(
+                model=model,
+                file=audio_file,
+                language=language,
+                prompt=prompt,
+            )
+        except Exception as exc:
+            logger.warning("openai_asr_failed", error=str(exc))
+            raise HTTPException(
+                status_code=503,
+                detail="语音转写服务暂时不可用，请稍后重试。",
+            ) from exc
+
+        transcript_text = (getattr(response, "text", "") or "").strip()
+        if not transcript_text:
+            raise HTTPException(status_code=502, detail="语音转写结果为空，请重试。")
+
+        return TranscriptionOutput(
+            transcript_text=transcript_text,
+            confidence=None,
+            provider=self.adapter_name,
+        )
+
+    async def health_check(self) -> bool:
+        return bool(self.config.api_key)
+
+    @property
+    def estimated_cost(self) -> float:
+        return 0.006
diff --git a/backend/app/services/provider_policy.py b/backend/app/services/provider_policy.py
index 61867e9..0a77b93 100644
--- a/backend/app/services/provider_policy.py
+++ b/backend/app/services/provider_policy.py
@@ -4,7 +4,7 @@ from dataclasses import dataclass
 from enum import Enum
 from typing import Literal, Protocol, TypeAlias
 
-ProviderType: TypeAlias = Literal["text", "image", "tts", "storybook"]
+ProviderType: TypeAlias = Literal["text", "image", "tts", "storybook", "asr"]
 
 
 class RoutingStrategy(str, Enum):
@@ -36,6 +36,7 @@ class ProviderSettings(Protocol):
     image_providers: list[str]
     tts_providers: list[str]
     storybook_providers: list[str]
+    asr_providers: list[str]
     enable_demo_providers: bool
 
 
@@ -71,6 +72,14 @@ CAPABILITY_POLICIES: dict[ProviderType, CapabilityPolicy] = {
         default_providers=("storybook_primary",),
         demo_provider="demo",
     ),
+    "asr": CapabilityPolicy(
+        capability="asr",
+        label="语音识别",
+        description="将孩子上传的语音回合转写为文本输入。",
+        settings_attr="asr_providers",
+        default_providers=("demo",),
+        demo_provider="demo",
+    ),
 }
 
 
@@ -94,6 +103,8 @@ API_KEY_MAP: dict[str, str] = {
     "antigravity_api_key": "antigravity_api_key",
     "image_primary": "image_api_key",
     "image_api_key": "image_api_key",
+    # ASR
+    "openai_asr": "openai_api_key",
     # TTS
     "minimax": "minimax_api_key",
     "minimax_api_key": "minimax_api_key",
diff --git a/backend/app/services/provider_router.py b/backend/app/services/provider_router.py
index a92fefd..08afb5a 100644
--- a/backend/app/services/provider_router.py
+++ b/backend/app/services/provider_router.py
@@ -113,6 +113,14 @@ def _get_default_config(adapter_name: str) -> AdapterConfig | None:
             timeout_ms=1000,
         )
 
+    # --- ASR Defaults ---
+    if adapter_name == "openai_asr":
+        return AdapterConfig(
+            api_key=settings.openai_api_key,
+            model=settings.voice_transcription_model,
+            timeout_ms=60000,
+        )
+
     # --- Text Defaults ---
     if adapter_name in ("gemini", "text_primary"):
         return AdapterConfig(
@@ -289,7 +297,7 @@ async def _route_with_failover(
     """通用 provider failover 路由。
 
     Args:
-        provider_type: 供应商类型 (text/image/tts/storybook)
+        provider_type: 供应商类型 (text/image/tts/storybook/asr)
         strategy: 路由策略
         db: 数据库会话（可选，用于指标收集和熔断检查）
         user_id: 用户 ID（可选，用于成本追踪和预算检查）
@@ -297,7 +305,14 @@ async def _route_with_failover(
         story_id: 故事 ID（可选，用于关联 provider 事件）
         **kwargs: 传递给适配器的参数
     """
-    providers = await _get_providers_with_config(provider_type)
+    provider_names = kwargs.pop("provider_names", None)
+    if provider_names:
+        providers = [
+            (name, _get_default_config(name) or AdapterConfig(api_key=""), None)
+            for name in provider_names
+        ]
+    else:
+        providers = await _get_providers_with_config(provider_type)
 
     if not providers:
         raise ValueError(f"No {provider_type} providers configured.")
@@ -457,6 +472,35 @@ async def _route_with_failover(
     raise ValueError(f"No {provider_type} provider succeeded. Errors: {' | '.join(errors)}")
 
 
+async def transcribe_audio(
+    audio_bytes: bytes,
+    file_name: str | None = None,
+    mime_type: str | None = None,
+    transcript_hint: str | None = None,
+    language: str | None = None,
+    provider_names: list[str] | None = None,
+    strategy: RoutingStrategy = RoutingStrategy.PRIORITY,
+    db: AsyncSession | None = None,
+    user_id: str | None = None,
+):
+    """语音转写，支持 provider failover。"""
+    from app.services.adapters.asr.models import TranscriptionOutput
+
+    result: TranscriptionOutput = await _route_with_failover(
+        "asr",
+        strategy=strategy,
+        db=db,
+        user_id=user_id,
+        audio_bytes=audio_bytes,
+        file_name=file_name,
+        mime_type=mime_type,
+        transcript_hint=transcript_hint,
+        language=language,
+        provider_names=provider_names,
+    )
+    return result
+
+
 async def generate_story_content(
     input_type: Literal["keywords", "full_story"],
     data: str,
diff --git a/backend/app/services/voice_session_service.py b/backend/app/services/voice_session_service.py
index b047387..aa78af1 100644
--- a/backend/app/services/voice_session_service.py
+++ b/backend/app/services/voice_session_service.py
@@ -1448,6 +1448,8 @@ async def create_voice_turn_from_upload_service(
             file_name=file_name,
             mime_type=mime_type,
             transcript_hint=transcript_hint,
+            db=db,
+            user_id=user_id,
         )
     except HTTPException as exc:
         session.last_error = str(exc.detail)
diff --git a/backend/app/services/voice_transcription_service.py b/backend/app/services/voice_transcription_service.py
index 2054add..a194e63 100644
--- a/backend/app/services/voice_transcription_service.py
+++ b/backend/app/services/voice_transcription_service.py
@@ -3,15 +3,12 @@
 from __future__ import annotations
 
 from dataclasses import dataclass
-from io import BytesIO
 
 from fastapi import HTTPException
-from openai import AsyncOpenAI
+from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.config import settings
-from app.core.logging import get_logger
-
-logger = get_logger(__name__)
+from app.services.provider_router import transcribe_audio
 
 
 @dataclass(frozen=True)
@@ -23,84 +20,9 @@ class VoiceTranscriptionResult:
     provider: str = "demo"
 
 
-def _normalize_transcript(transcript_text: str) -> str:
-    return transcript_text.strip()
-
-
-async def _transcribe_demo(
-    *,
-    audio_bytes: bytes,
-    mime_type: str | None,
-    transcript_hint: str | None,
-) -> VoiceTranscriptionResult:
-    hint = _normalize_transcript(transcript_hint or "")
-    if hint:
-        return VoiceTranscriptionResult(
-            transcript_text=hint,
-            confidence=1.0,
-            provider="demo",
-        )
-
-    if mime_type and mime_type.startswith("text/"):
-        text = _normalize_transcript(audio_bytes.decode("utf-8", errors="ignore"))
-        if text:
-            return VoiceTranscriptionResult(
-                transcript_text=text,
-                confidence=1.0,
-                provider="demo",
-            )
-
-    raise HTTPException(
-        status_code=503,
-        detail=(
-            "当前环境未配置真实语音转写，请先使用文本共创模式，"
-            "或在开发模式下提供 transcript_hint。"
-        ),
-    )
-
-
-async def _transcribe_openai(
-    *,
-    audio_bytes: bytes,
-    file_name: str,
-    mime_type: str | None,
-    transcript_hint: str | None,
-) -> VoiceTranscriptionResult:
-    if not settings.openai_api_key:
-        raise HTTPException(
-            status_code=503,
-            detail="OPENAI_API_KEY 未配置，无法使用 OpenAI 语音转写。",
-        )
-
-    client = AsyncOpenAI(api_key=settings.openai_api_key)
-    audio_file = BytesIO(audio_bytes)
-    audio_file.name = file_name
-
-    prompt = transcript_hint.strip() if transcript_hint else None
-
-    try:
-        response = await client.audio.transcriptions.create(
-            model=settings.voice_transcription_model,
-            file=audio_file,
-            language=settings.voice_transcription_language,
-            prompt=prompt,
-        )
-    except Exception as exc:
-        logger.warning("voice_transcription_openai_failed", error=str(exc))
-        raise HTTPException(
-            status_code=503,
-            detail="语音转写服务暂时不可用，请稍后重试。",
-        ) from exc
-
-    transcript_text = _normalize_transcript(getattr(response, "text", "") or "")
-    if not transcript_text:
-        raise HTTPException(status_code=502, detail="语音转写结果为空，请重试。")
-
-    return VoiceTranscriptionResult(
-        transcript_text=transcript_text,
-        confidence=None,
-        provider="openai",
-    )
+def _resolve_transcript_hint(transcript_hint: str | None) -> str | None:
+    normalized = (transcript_hint or "").strip()
+    return normalized or None
 
 
 async def transcribe_voice_audio(
@@ -109,26 +31,35 @@ async def transcribe_voice_audio(
     file_name: str,
     mime_type: str | None,
     transcript_hint: str | None = None,
+    db: AsyncSession | None = None,
+    user_id: str | None = None,
 ) -> VoiceTranscriptionResult:
-    """Transcribe one uploaded audio turn according to the configured mode."""
+    """Transcribe one uploaded audio turn using configured ASR providers."""
 
-    mode = (settings.voice_transcription_mode or "demo").strip().lower()
+    mode = (settings.voice_transcription_mode or "provider").strip().lower()
 
     if mode == "disabled":
         raise HTTPException(
             status_code=503,
             detail="当前环境已禁用语音转写，请先使用文本共创模式。",
         )
-    if mode == "openai":
-        return await _transcribe_openai(
-            audio_bytes=audio_bytes,
-            file_name=file_name,
-            mime_type=mime_type,
-            transcript_hint=transcript_hint,
-        )
 
-    return await _transcribe_demo(
+    hint = _resolve_transcript_hint(transcript_hint)
+    provider_name = "openai_asr" if mode == "openai" else mode
+    strategy_providers = None if mode == "provider" else [provider_name]
+    result = await transcribe_audio(
         audio_bytes=audio_bytes,
+        file_name=file_name,
         mime_type=mime_type,
-        transcript_hint=transcript_hint,
+        transcript_hint=hint,
+        language=settings.voice_transcription_language,
+        provider_names=strategy_providers,
+        db=db,
+        user_id=user_id,
+    )
+
+    return VoiceTranscriptionResult(
+        transcript_text=result.transcript_text,
+        confidence=result.confidence,
+        provider=result.provider,
     )
diff --git a/backend/tests/test_provider_router.py b/backend/tests/test_provider_router.py
index d4264cd..328d85a 100644
--- a/backend/tests/test_provider_router.py
+++ b/backend/tests/test_provider_router.py
@@ -244,8 +244,9 @@ class TestProviderPolicy:
         policies = list_capability_policies()
         capabilities = {item["capability"] for item in policies}
 
-        assert capabilities == {"text", "image", "tts", "storybook"}
+        assert capabilities == {"text", "image", "tts", "storybook", "asr"}
         assert DEFAULT_PROVIDERS["storybook"] == ["storybook_primary"]
+        assert DEFAULT_PROVIDERS["asr"] == ["demo"]
 
     def test_demo_provider_only_added_to_supported_capabilities(self):
         settings = SimpleNamespace(
@@ -253,6 +254,7 @@ class TestProviderPolicy:
             image_providers=["cqtai"],
             tts_providers=["edge_tts"],
             storybook_providers=["storybook_primary"],
+            asr_providers=["openai_asr"],
             enable_demo_providers=True,
         )
 
@@ -263,6 +265,7 @@ class TestProviderPolicy:
             "storybook_primary",
         ]
         assert get_provider_names_from_settings("tts", settings) == ["edge_tts"]
+        assert get_provider_names_from_settings("asr", settings) == ["demo", "openai_asr"]
 
     def test_policy_defaults_when_settings_lists_are_empty(self):
         settings = SimpleNamespace(
@@ -270,6 +273,7 @@ class TestProviderPolicy:
             image_providers=[],
             tts_providers=[],
             storybook_providers=[],
+            asr_providers=[],
             enable_demo_providers=False,
         )
 
@@ -279,6 +283,22 @@ class TestProviderPolicy:
             "elevenlabs",
             "edge_tts",
         ]
+        assert get_provider_names_from_settings("asr", settings) == ["demo"]
+
+    @pytest.mark.asyncio
+    async def test_asr_demo_provider_uses_transcript_hint(self):
+        from app.services import provider_router
+
+        result = await provider_router.transcribe_audio(
+            audio_bytes=b"fake-audio",
+            file_name="turn.webm",
+            mime_type="audio/webm",
+            transcript_hint="我想听一个小熊找星星的故事",
+        )
+
+        assert result.transcript_text == "我想听一个小熊找星星的故事"
+        assert result.confidence == 1.0
+        assert result.provider == "demo"
 
 
 class TestProviderConfigFromDB:
diff --git a/docs/planning/demo-checklist.md b/docs/planning/demo-checklist.md
index f31a0f4..ae02784 100644
--- a/docs/planning/demo-checklist.md
+++ b/docs/planning/demo-checklist.md
@@ -26,6 +26,7 @@ docker compose ps
 
 - 用户端：http://localhost:52080
 - 本地登录：http://localhost:52080/auth/dev/signin
+- 语音共创：http://localhost:52080/voice-studio
 - Admin：http://localhost:52888
 - 后端健康：http://localhost:52000/health
 - Admin 后端健康：http://localhost:52800/health
@@ -46,6 +47,18 @@ docker compose ps
 SMOKE_AUDIO=1 ./scripts/demo_smoke.sh
 ```
 
+需要检查语音共创 Alpha 时：
+
+```bash
+SMOKE_VOICE=1 ./scripts/demo_smoke.sh
+```
+
+需要同时检查 TTS 和语音共创时：
+
+```bash
+SMOKE_AUDIO=1 SMOKE_VOICE=1 ./scripts/demo_smoke.sh
+```
+
 通过标准：
 
 - [ ] backend health 返回 `ok`
@@ -62,9 +75,10 @@ SMOKE_AUDIO=1 ./scripts/demo_smoke.sh
 - [ ] 绘本 provider stats 返回成功率、耗时和成本字段
 - [ ] 绘本图片 retry 后 `image_status=ready`
 - [ ] 绘本阅读页能看到生成轨迹和资源重试历史
-- [ ] `/admin/providers/capabilities` 返回 `text/image/tts/storybook`
+- [ ] `/admin/providers/capabilities` 返回 `text/image/tts/storybook/asr`
 - [ ] `/api/audio/{story_id}/status` 能查询音频缓存状态且不触发生成
 - [ ] 如果启用 `SMOKE_AUDIO=1`，音频 retry 后 `audio_status=ready`
+- [ ] 如果启用 `SMOKE_VOICE=1`，语音共创会话可完成文本 fallback、上传回合、analytics 和 finalize 到 Story
 - [ ] 验证结果已记录到 `docs/planning/demo-validation-log.md`
 
 ---
@@ -101,11 +115,26 @@ SMOKE_AUDIO=1 ./scripts/demo_smoke.sh
 1. 打开 Admin。
 2. 说明管理端不是用户主链路，而是产品拥有者维护供应链路的辅助能力。
 3. 通过接口或页面说明：
-   - Capability: `text/image/tts/storybook`
+   - Capability: `text/image/tts/storybook/asr`
    - Provider: 具体供应商配置
    - Adapter: API 调用实现
    - Routing Policy: 优先级/成本/延迟/轮询
 
+### 路径 D: 语音共创 Alpha
+
+1. 打开用户端并进入“语音共创”。
+2. 创建一个新会话，先使用文本 fallback 快速演示：
+   - 首轮：`我想听一个小熊和星星一起找家的故事`
+   - 修正：`不要让小熊害怕，让月亮姐姐帮它`
+3. 展示每轮内容：
+   - 用户表达 / 系统理解
+   - 系统文字回应
+   - TTS 语音回应状态
+   - 最近事件和待处理提示
+4. 演示低置信度确认：说明系统会提示“本轮系统理解为”，家长可选择继续、重说或改成文本。
+5. 点击结束并保存，确认正式 Story 进入故事库。
+6. 打开生成轨迹，说明语音共创 finalize 后的封面资产补全已经接回统一 generation job。
+
 ---
 
 ## 4. 3 分钟讲解结构
@@ -137,6 +166,8 @@ DreamWeaver 是面向 3-8 岁亲子场景的个性化 AI 绘本与陪伴式讲
 | 网络导致 TTS 失败 | 说明音频是可恢复资产，不阻塞故事阅读；使用已缓存样本或跳过 TTS |
 | 图片 provider 未补全 | 展示 partial ready，说明主内容已可读、资产可稍后补全 |
 | 图片 provider 失败 | 展示 degraded completed 与 retry 机制 |
+| 录音或 ASR 不稳定 | 切到文本 fallback，说明 Alpha 阶段已保留降级路径 |
+| 语音共创低置信度卡住 | 使用“按这个理解继续”或“改成文本输入”完成本轮 |
 | Docker 冷启动慢 | 演示前提前运行 smoke 脚本并保持容器运行 |
 | Admin 页面不适合主展示 | 只用 Provider 分层说明辅助讲系统设计 |
 | 面试官追问生产部署 | 明确当前是求职版 MVP，本轮重点是产品闭环和系统边界 |
@@ -149,4 +180,5 @@ DreamWeaver 是面向 3-8 岁亲子场景的个性化 AI 绘本与陪伴式讲
 - [ ] 能现场看到普通故事和绘本结果。
 - [ ] 能解释失败降级和资产重试。
 - [ ] 能解释为什么 Provider 分层是产品设计，而不是单纯技术炫技。
+- [ ] 能说明语音共创当前是 Phase A Alpha，而不是实时语音最终形态。
 - [ ] 能说明下一步计划，而不是让项目停在 demo。
diff --git a/docs/planning/demo-validation-log.md b/docs/planning/demo-validation-log.md
index 3c95a44..e0acd9a 100644
--- a/docs/planning/demo-validation-log.md
+++ b/docs/planning/demo-validation-log.md
@@ -2,6 +2,48 @@
 
 这份记录用于演示前快速说明“当前本地 Docker 环境已经验证到什么程度”。新的验证记录按时间倒序追加。
 
+## 2026-04-24
+
+补充验证：
+
+- 已拉取远端 `main` 到 `7e450aa fix: stabilize auth and generation workflows`。
+- 用户端 `npm run build` 通过，包含最新 Voice Studio、登录态修复和 generation trace 变更。
+- 管理端首次 `npm run build` 因 Rollup Linux optional dependency 缺失失败；执行 `npm install` 补齐 `@rollup/rollup-linux-x64-gnu` 后，管理端 `npm run build` 通过。
+- 后端当前仓库内 `.venv` 是 Windows 虚拟环境结构，WSL/bash 下无法直接执行 `.venv/bin/python`；系统也没有全局 `pytest`。尝试创建 Linux venv 时发现当前 WSL 缺少 `python3.12-venv`，尝试使用 Docker 时发现当前 WSL 未启用 Docker Desktop 集成。本轮未完成后端 pytest，需要后续在 Linux venv、Docker 或 Windows PowerShell 环境补跑。
+- 语音共创 PRD 已从 Discovery Track 更新为 Phase A Alpha，并补充 Alpha 验收矩阵、退出标准和未完成项。
+- 演示 checklist 已新增 Voice Studio 入口、语音共创 Alpha 手动演示路径和风险预案。
+- `scripts/demo_smoke.sh` 已新增可选 `SMOKE_VOICE=1` 分支，覆盖 Voice Session 创建、文本 fallback、上传回合 demo transcript hint、会话 detail/events、voice analytics、finalize 到 Story 和故事可读性断言。
+- ASR 已纳入 Provider 能力分层：默认 `ASR_PROVIDERS=["demo"]`，真实转写可配置 `ASR_PROVIDERS=["openai_asr", "demo"]` 与 `OPENAI_API_KEY`。
+- 管理端 Provider UI 已补 `asr`：运营摘要支持按语音识别筛选，Provider tab 可创建/查看 ASR provider，用户端嵌入的 Provider 管理页同步新增 `asr` tab。
+- `bash -n scripts/demo_smoke.sh` 通过。
+
+执行命令：
+
+```bash
+cd frontend && npm run build
+cd admin-frontend && npm run build
+cd admin-frontend && npm install
+cd admin-frontend && npm run build
+cd backend && pytest -q
+cd backend && ./.venv/bin/python --version
+cd backend && python3 -m venv .venv-linux
+docker compose ps
+bash -n scripts/demo_smoke.sh
+```
+
+结果：
+
+- 用户端 `vue-tsc && vite build` 通过。
+- 管理端 `vue-tsc && vite build` 在补依赖后通过。
+- `scripts/demo_smoke.sh` shell 语法检查通过；受当前 WSL 未启用 Docker 影响，未执行完整接口 smoke。
+- 后端测试未运行成功，原因是当前执行环境缺少 Linux 可用的 Python dev venv / pytest，且 WSL 未启用 Docker。
+
+后续补验建议：
+
+- 在 WSL 下先安装 `python3.12-venv`，再执行 `cd backend && python3 -m venv .venv-linux && .venv-linux/bin/pip install -e ".[dev]" && .venv-linux/bin/python -m pytest -q`。
+- 或在 Windows PowerShell 下执行 `cd backend; .\.venv\Scripts\python.exe -m pytest -q`。
+- 后端通过后，再运行 `docker compose up -d --build`、`SMOKE_VOICE=1 ./scripts/demo_smoke.sh`，并手动走一遍 Voice Studio Alpha 路径。
+
 ## 2026-04-18
 
 补充验证：
diff --git a/docs/product/voice-co-creation-mode-incremental-prd.md b/docs/product/voice-co-creation-mode-incremental-prd.md
index c032107..88fedc1 100644
--- a/docs/product/voice-co-creation-mode-incremental-prd.md
+++ b/docs/product/voice-co-creation-mode-incremental-prd.md
@@ -1,9 +1,9 @@
 # Product Requirements Document: 语音共创模式增量方案
 
-**Version**: 0.1  
-**Date**: 2026-04-19  
-**Author**: Codex (based on founder direction)  
-**Status**: Discovery Track / 不插队当前主开发线
+**Version**: 0.2
+**Date**: 2026-04-24
+**Author**: Codex (based on founder direction)
+**Status**: Phase A Alpha / 已进入可演示收束
 
 ---
 
@@ -13,7 +13,7 @@ DreamWeaver 当前已经具备“输入主题 -> 生成故事/绘本 -> 补全
 
 这个方向的价值不在于再加一个输入方式，而在于把 DreamWeaver 从“生成结果”推进到“陪伴式创作过程”。孩子不是先写清楚需求再等待结果，而是可以像和讲故事的人对话一样，说出自己想要的角色、情节和变化，系统实时或准实时地接住这些表达，再继续讲下去。
 
-本增量 PRD 的目标不是立刻把语音共创插入当前主开发线，而是先把它定义为一条独立、可评估、可拆阶段落地的产品路线。当前主线仍应继续沿着统一生成工作流、跨环境观测、断点续跑与稳定性治理推进；语音共创作为下一波产品升级方向，先完成需求定义、架构判断和分阶段实施策略。
+本增量 PRD 最初用于把语音共创定义为一条独立、可评估、可拆阶段落地的产品路线。2026-04-24 更新后，远端 `main` 已经提前跑通 Phase A Alpha：独立 Voice Studio、语音/文本回合、低置信度确认、安全改写、TTS 回复、会话恢复、finalize 保存为 Story，以及接回统一 generation job 的资产补全与 trace。下一步不应继续扩大到 Phase B 实时化，而应先完成 Alpha 验收、真实 ASR Provider 接入、成本/观测补齐，并回到原主线的跨环境 Provider 汇聚、监控告警和断点续跑。
 
 ---
 
@@ -21,19 +21,20 @@ DreamWeaver 当前已经具备“输入主题 -> 生成故事/绘本 -> 补全
 
 ### Decision
 
-语音共创模式 **现在进入产品发现与方案设计阶段**，但 **不插队当前主开发线**。
+语音共创模式已经从 **产品发现与方案设计阶段** 进入 **Phase A Alpha 可演示收束阶段**。
 
 ### Why
 
-- 当前主线已经明确：统一生成工作流、任务控制、Provider 运营分析、监控与恢复能力。
-- 语音共创会引入新的交互模式、新的数据模型和新的低延迟系统要求，如果直接插入，会同时打断稳定性主线和架构收束节奏。
-- 先写清楚增量 PRD，可以避免后续“想到什么做什么”，也能帮助后面的技术选型、原型验证和资源预估。
+- 当前主线已经完成统一生成工作流、任务控制、Provider 运营分析、资产补全 trace 和基本恢复能力。
+- Phase A 的数据模型、API、Voice Studio 和 finalize 链路已经落地，但仍处于 Alpha；它需要验收、真实 ASR 接入和观测补齐，而不是继续扩大范围。
+- Phase B/Phase C 会引入流式 ASR、WebSocket、barge-in 和更高实时性要求，应等 Phase A 的产品价值和稳定性被验证后再启动。
 
 ### Proposed Sequencing
 
-1. 继续推进当前主线：跨环境 Provider 汇聚、监控告警、断点续跑与更细粒度任务控制。
-2. 并行完成语音共创模式的交互原型、增量 PRD 和技术预研。
-3. 等当前主线进入相对稳定阶段后，再按分阶段方案启动语音共创 MVP。
+1. 先完成 Phase A Alpha 收束：回归验证、演示清单、验收矩阵和已知限制记录。
+2. 补齐真实 ASR Provider、turn 级成本/指标归因、Voice Studio smoke 路径和失败降级验收。
+3. 回到生产化主线：跨环境 Provider 汇聚、监控告警、断点续跑与更细粒度任务控制。
+4. Phase A 稳定并验证产品价值后，再评估 Phase B 准实时共创。
 
 ---
 
@@ -498,6 +499,32 @@ DreamWeaver 的语音共创模式应当成为一种“孩子可以开口参与
 
 ## MoSCoW Prioritization
 
+## Phase A Alpha Acceptance Snapshot（2026-04-24）
+
+| Requirement | Status | Evidence | Next Action |
+| --- | --- | --- | --- |
+| FR-001 语音发起故事共创会话 | Alpha Done | `VoiceStudio` 已提供独立入口，支持录音上传回合和文本 fallback；后端有 `POST /api/voice-sessions/{id}/turns` | 用真实儿童表达样本补演示 smoke |
+| FR-002 区分开始、继续、修正 | Alpha Done | turn service 已按 `start/continue/correct` 更新会话状态，修正不会清空整段故事 | 增加更多真实儿童表达样本验收 |
+| FR-003 系统语音回应并继续讲述 | Alpha Done | 每轮生成 assistant 文本后调用 TTS，TTS 失败保留文本响应 | 记录 TTS 延迟与失败率到更细指标 |
+| FR-004 保存为正式故事资产 | Alpha Done | `finalize` 已持久化 Story，并返回 `generation_job_id` 接回封面资产补全 trace | 补 finalize 后故事库/详情页端到端 smoke |
+| FR-005 记录语音会话状态 | Alpha Done | 已有 `voice_sessions / voice_turns / voice_session_events`，前端展示最近 turn 与事件 | 补 turn 级成本与 Provider 归因 |
+| FR-006 家长确认关键改写 | Alpha Done | 低 `transcript_confidence` 或 `intent_confidence` 会触发确认，支持继续、重说、改文本 | 打磨确认文案和移动端操作密度 |
+| FR-007 分段插图节点 | Partial | 当前支持结束后统一封面补全，并为 asset job 接回统一 trace | 后续评估关键段落插图，不进当前 P0 |
+| FR-008 分支剧情 | Deferred | 当前状态模型不阻断未来扩展，但未实现分叉体验 | 保持 P2，Phase A 不做 |
+| NFR-001 响应可接受 | Needs Measurement | 回合式体验已实现，但尚无 p95 指标采集 | 加入 ASR/TTS/turn 编排耗时埋点 |
+| NFR-002 儿童内容安全 | Alpha Done | 已新增用户转写安全检查、assistant 柔性改写和 `safety_flags` 事件 | 扩充安全样本和误伤回归 |
+| NFR-003 成本可观测 | Partial | generation job/provider analytics 已覆盖资产补全；voice turn 级 ASR/TTS 成本仍需细化 | 把 ASR/Dialogue/TTS 成本写入 turn/event metadata |
+| NFR-004 会话可恢复 | Alpha Done | Voice Studio 支持最近会话恢复和 active session 查询 | 补刷新/切页手动验收记录 |
+| NFR-005 架构可插拔 | Alpha Done | ASR 已纳入 `asr` Provider capability，默认 demo fallback，可配置 `openai_asr` | 后续补更多 ASR provider 与管理端体验 |
+
+### Alpha Exit Criteria
+
+- 后端测试、前端构建、管理端构建和 Docker smoke 在当前环境可重复通过。
+- Voice Studio 手动路径覆盖：创建会话、文本 fallback、录音回合、低置信度确认、重说/改文本、finalize、故事库回看、资产 trace。
+- 真实 ASR Provider 至少完成一个可配置适配器，并保留 demo fallback。（已接入 `openai_asr`，待真实 Key 环境验收）
+- turn 级事件至少能区分 ASR、Dialogue、TTS、Safety、Confirmation、Finalize 和 Asset Generation。
+- PRD、技术方案、演示 checklist 与当前实现保持一致。
+
 ### Must Have
 
 - 语音发起故事
diff --git a/docs/technical/voice-co-creation-phase-a-tech-spec.md b/docs/technical/voice-co-creation-phase-a-tech-spec.md
index bbb7421..6468171 100644
--- a/docs/technical/voice-co-creation-phase-a-tech-spec.md
+++ b/docs/technical/voice-co-creation-phase-a-tech-spec.md
@@ -446,8 +446,8 @@ Phase A 明确不做以下内容：
 
 理由是：
 
-- 当前 admin Provider 只有 `text/image/tts/storybook`
-- 如果一开始把 `asr` 也并进全套管理能力，改动面会大很多
+- 当前 admin Provider 已扩展到 `text/image/tts/storybook/asr`
+- Phase A Alpha 已把 ASR 纳入最小 Provider 能力，但仍保留 demo fallback，避免真实转写不可用时阻塞演示
 
 ### B. Dialogue Orchestrator
 
diff --git a/frontend/src/views/AdminProviders.vue b/frontend/src/views/AdminProviders.vue
index fc01dd1..8cf2a01 100644
--- a/frontend/src/views/AdminProviders.vue
+++ b/frontend/src/views/AdminProviders.vue
@@ -68,7 +68,7 @@
           <!-- Tabs -->
           <div class="flex space-x-1 bg-gray-100 p-1 rounded-xl w-fit">
             <button
-              v-for="tab in ['text', 'image', 'tts', 'storybook']"
+              v-for="tab in ['text', 'image', 'tts', 'storybook', 'asr']"
               :key="tab"
               @click="activeTab = tab"
               class="px-6 py-2 rounded-lg text-sm font-medium transition-all duration-200"
diff --git a/scripts/demo_smoke.sh b/scripts/demo_smoke.sh
index e7d983c..20a1a19 100755
--- a/scripts/demo_smoke.sh
+++ b/scripts/demo_smoke.sh
@@ -6,6 +6,7 @@ BACKEND_URL="${BACKEND_URL:-http://localhost:52000}"
 ADMIN_BACKEND_URL="${ADMIN_BACKEND_URL:-http://localhost:52800}"
 ADMIN_AUTH="${ADMIN_AUTH:-admin:admin}"
 SMOKE_AUDIO="${SMOKE_AUDIO:-0}"
+SMOKE_VOICE="${SMOKE_VOICE:-0}"
 
 COOKIE_JAR="$(mktemp "${TMPDIR:-/tmp}/dreamweaver-cookie.XXXXXX")"
 cleanup() {
@@ -33,6 +34,12 @@ post_json() {
   curl -fsS -b "$COOKIE_JAR" -H 'Content-Type: application/json' -d "$payload" "$url"
 }
 
+post_form() {
+  local url="$1"
+  shift
+  curl -fsS -b "$COOKIE_JAR" "$@" "$url"
+}
+
 get_json() {
   local url="$1"
   curl -fsS -b "$COOKIE_JAR" "$url"
@@ -86,7 +93,7 @@ assert_jq "$session_json" '.user.id == "github:dev_user_001"' "dev session shoul
 
 say "Checking provider capability policy"
 capabilities_json="$(curl -fsS -u "$ADMIN_AUTH" "$ADMIN_BACKEND_URL/admin/providers/capabilities")"
-assert_jq "$capabilities_json" 'map(.capability) | sort == ["image","storybook","text","tts"]' "capabilities should include text/image/tts/storybook"
+assert_jq "$capabilities_json" 'map(.capability) | sort == ["asr","image","storybook","text","tts"]' "capabilities should include text/image/tts/storybook/asr"
 
 say "Generating text story without assets"
 story_json="$(post_json "$APP_URL/api/generations" '{
@@ -149,6 +156,67 @@ else
   say "Skipping audio smoke; set SMOKE_AUDIO=1 to include TTS"
 fi
 
+if [[ "$SMOKE_VOICE" == "1" ]]; then
+  say "Creating voice co-creation session"
+  voice_session_json="$(post_json "$APP_URL/api/voice-sessions" '{}')"
+  voice_session_id="$(jq -r '.id' <<<"$voice_session_json")"
+  assert_jq "$voice_session_json" '.status == "draft" and .target_mode == "story" and .can_continue == true' "voice session should be created as a resumable draft"
+  echo "$voice_session_json" | jq '{id,status,target_mode,current_turn_index,can_continue,can_finalize,transcription_mode_hint}'
+
+  say "Submitting voice text fallback turn"
+  voice_turn_json="$(post_json "$APP_URL/api/voice-sessions/$voice_session_id/turns/fallback" '{
+    "transcript_text": "我想听一个小熊和星星一起找家的故事",
+    "duration_ms": 1200
+  }')"
+  voice_turn_id="$(jq -r '.turn_id' <<<"$voice_turn_json")"
+  assert_jq "$voice_turn_json" '.status != "failed" and .turn_id != null and .turn_id != ""' "voice fallback turn should be accepted"
+
+  voice_turn_detail_json="$(get_json "$APP_URL/api/voice-sessions/$voice_session_id/turns/$voice_turn_id")"
+  assert_jq "$voice_turn_detail_json" '.user_transcript | contains("小熊")' "voice fallback turn should keep user transcript"
+  assert_jq "$voice_turn_detail_json" '.assistant_text != null and .assistant_text != ""' "voice fallback turn should return assistant text"
+  assert_jq "$voice_turn_detail_json" '.detected_intent == "start" and .requires_confirmation == false' "first voice turn should start the story without confirmation"
+  echo "$voice_turn_detail_json" | jq '{id,status,detected_intent,requires_confirmation,assistant_audio_ready,assistant_text}'
+
+  say "Submitting voice uploaded turn with demo transcript hint"
+  voice_upload_json="$(post_form "$APP_URL/api/voice-sessions/$voice_session_id/turns" \
+    -F 'audio_file=@/dev/null;filename=turn.webm;type=audio/webm' \
+    -F 'duration_ms=900' \
+    -F 'transcript_hint=不要让小熊害怕，让月亮姐姐帮它')"
+  voice_upload_turn_id="$(jq -r '.turn_id' <<<"$voice_upload_json")"
+  assert_jq "$voice_upload_json" '.status != "failed" and .transcription_provider == "demo"' "voice upload turn should use demo transcript hint"
+
+  voice_upload_detail_json="$(get_json "$APP_URL/api/voice-sessions/$voice_session_id/turns/$voice_upload_turn_id")"
+  assert_jq "$voice_upload_detail_json" '.user_transcript | contains("月亮姐姐")' "voice upload turn should expose hinted transcript"
+  assert_jq "$voice_upload_detail_json" '.detected_intent == "correct" and .assistant_text != null' "voice upload correction should continue the narrative"
+  echo "$voice_upload_detail_json" | jq '{id,status,transcription_provider,detected_intent,requires_confirmation,assistant_audio_ready,assistant_text}'
+
+  say "Checking voice session detail and analytics"
+  voice_detail_json="$(get_json "$APP_URL/api/voice-sessions/$voice_session_id")"
+  assert_jq "$voice_detail_json" '.current_turn_index >= 2 and (.recent_turns | length) >= 2 and (.events | length) >= 2 and .can_finalize == true' "voice session should include turns/events and be finalizable"
+  assert_jq "$voice_detail_json" '([.events[].event_type] | index("turn_transcribed")) != null and ([.events[].event_type] | index("turn_narrative_ready")) != null' "voice session should record key turn events"
+  echo "$voice_detail_json" | jq '{id,status,current_turn_index,can_finalize,latest_detected_intent,events:([.events[].event_type] | unique)}'
+
+  voice_analytics_json="$(get_json "$APP_URL/api/voice-sessions/analytics?days=7")"
+  assert_jq "$voice_analytics_json" '.window_days == 7 and .total_sessions >= 1 and .total_turns >= 2 and .successful_turns >= 2' "voice analytics should include the smoke session"
+  echo "$voice_analytics_json" | jq '{window_days,total_sessions,total_turns,successful_turns,failed_turns,turn_success_rate,finalize_conversion_rate}'
+
+  say "Finalizing voice session into story"
+  voice_finalize_json="$(post_json "$APP_URL/api/voice-sessions/$voice_session_id/finalize" '{
+    "save_story": true,
+    "generate_cover": true,
+    "generate_final_audio": false
+  }')"
+  voice_story_id="$(jq -r '.story_id' <<<"$voice_finalize_json")"
+  assert_jq "$voice_finalize_json" '.status == "completed" and .story_id != null' "voice session should finalize into a story"
+  echo "$voice_finalize_json" | jq '{session_id,status,story_id,generation_job_id}'
+
+  voice_story_json="$(get_json "$APP_URL/api/generations/$voice_story_id")"
+  assert_jq "$voice_story_json" '.mode == "generated" and .generation_status != "failed" and .text_status == "ready"' "voice finalized story should be readable"
+  echo "$voice_story_json" | jq '{id,title,mode,generation_status,text_status,image_status,audio_status,retryable_assets}'
+else
+  say "Skipping voice co-creation smoke; set SMOKE_VOICE=1 to include Voice Studio Alpha"
+fi
+
 say "Generating storybook without images"
 storybook_json="$(post_json "$APP_URL/api/generations" '{
   "output_mode": "storybook",