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/Dockerfile

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+FROM python:3.11-slim
+
+# aiortc(WebRTC)和 onnxruntime(Silero VAD)需要的系统库
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    ffmpeg \
+    libopus0 \
+    libvpx-dev \
+    libsrtp2-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]