Add support for Xfyun ASR and TTS services in the backend

- Introduce new Xfyun ASR and TTS services, enabling integration with iFlytek's voice recognition and synthesis capabilities.
- Update AssistantConfig model to include interface types for STT and TTS.
- Enhance credential testing to validate Xfyun credentials.
- Modify service factory to create Xfyun services based on configuration.
- Update README with new configuration details for Xfyun integration.
- Add new frontend components for visualizing audio streams and managing user interactions.

backend/routes/credentials.py

@@ -15,7 +15,7 @@ from schemas import (
     CredentialTestResult,
     CredentialUpsert,
 )
-from services.credential_tester import test_openai_credential
+from services.credential_tester import test_openai_credential, test_xfyun_credential
 from services.masking import mask, resolve_incoming_key
 from sqlalchemy import select, update
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -84,6 +84,8 @@ async def create_credential(
 
 @router.post("/test", response_model=CredentialTestResult)
 async def test_new_credential(body: CredentialTestRequest):
+    if body.interface_type == "xfyun":
+        return test_xfyun_credential(body)
     if body.interface_type != "openai":
         return CredentialTestResult(
             ok=False,
@@ -111,6 +113,8 @@ async def test_saved_credential(
     config = body.model_copy(
         update={"api_key": resolve_incoming_key(body.api_key, c.api_key)}
     )
+    if config.interface_type == "xfyun":
+        return test_xfyun_credential(config)
     if config.interface_type != "openai":
         return CredentialTestResult(
             ok=False,