Initial commit: AI Video Assistant fullstack platform.

Add pipecat-based backend with WebRTC/WS voice routes, Next.js frontend, and Docker Compose orchestration.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/schemas.py

@@ -0,0 +1,66 @@
+"""面向前端的请求/响应 DTO。与 DB 模型解耦,**响应里的 key 一律打码**。
+
+凭证 DTO 字段对齐前端 ComponentsModelsPage 的 ModelResource:
+JSON 用 camelCase(modelId/interfaceType/apiUrl/apiKey),Python 内部用 snake_case,
+靠 Pydantic alias 自动互转。FastAPI 响应默认 by_alias=True,所以出参也是 camelCase。
+"""
+
+from __future__ import annotations
+
+from typing import Literal
+
+from pydantic import BaseModel, ConfigDict
+from pydantic.alias_generators import to_camel
+
+RuntimeMode = Literal["pipeline", "realtime"]
+ModelType = Literal["LLM", "ASR", "TTS", "Realtime", "Embedding"]
+InterfaceType = Literal["openai", "xfyun", "dashscope", "gemini"]
+
+
+class CamelModel(BaseModel):
+    """JSON camelCase ↔ Python snake_case。protected_namespaces 关掉以允许 model_id。"""
+
+    model_config = ConfigDict(
+        alias_generator=to_camel,
+        populate_by_name=True,
+        protected_namespaces=(),
+    )
+
+
+# ---------- 助手 ----------
+class AssistantUpsert(CamelModel):
+    name: str
+    greeting: str = ""
+    prompt: str = ""
+    runtime_mode: RuntimeMode = "pipeline"
+    model: str = ""
+    asr: str = ""
+    voice: str = ""
+    enable_interrupt: bool = True
+
+
+class AssistantOut(AssistantUpsert):
+    id: str
+    updated_at: str | None = None
+
+
+# ---------- 模型凭证(对齐前端 ModelResource) ----------
+class CredentialUpsert(CamelModel):
+    name: str = ""                              # 资源名称
+    model_id: str = ""                          # 模型ID
+    type: ModelType                             # LLM/ASR/TTS/Realtime/Embedding
+    interface_type: InterfaceType = "openai"    # openai/xfyun/dashscope/gemini
+    api_url: str = ""
+    api_key: str = ""                           # 写时:占位符/空表示不改
+    is_default: bool = False
+
+
+class CredentialOut(CamelModel):
+    id: str
+    name: str
+    model_id: str
+    type: str
+    interface_type: str
+    api_url: str
+    api_key: str                                # 读时:打码后的值
+    is_default: bool