Remove server remote browser support

Dockerfile

@@ -1,12 +1,10 @@
-# syntax=docker/dockerfile:1.4
 # ---- Stage 1: Build frontend ----
 FROM node:20-alpine AS frontend-build
 WORKDIR /frontend
 
 # 依赖层：package*.json 不变则复用 npm 缓存
 COPY frontend/package*.json ./
-RUN --mount=type=cache,target=/root/.npm \
-    npm ci --registry=https://registry.npmmirror.com
+RUN npm ci --registry=https://registry.npmmirror.com
 
 # 源码层：业务代码变更不影响上层依赖
 COPY frontend/ .
@@ -16,39 +14,23 @@ RUN npm run build
 FROM python:3.12-slim
 WORKDIR /app
 
-ENV PLAYWRIGHT_DOWNLOAD_HOST=https://npmmirror.com/mirrors/playwright
-ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
-
 RUN sed -i 's|http://deb.debian.org|https://mirrors.aliyun.com|g; s|http://security.debian.org|https://mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources
 
-# Install tini as PID 1 to properly reap orphan Chromium zombie processes
+# Install tini as PID 1 to properly reap orphan processes
 RUN apt-get update && apt-get install -y --no-install-recommends tini && rm -rf /var/lib/apt/lists/*
 
 # 系统依赖层：apt 包安装，缓存 deb 包避免重复下载
-RUN --mount=type=cache,target=/var/cache/apt \
-    apt-get update \
+RUN apt-get update \
     && apt-get install -y --no-install-recommends \
-      fonts-liberation fonts-unifont fonts-wqy-zenhei \
-      libasound2t64 libatk-bridge2.0-0 libatk1.0-0 libatspi2.0-0 \
-      libcairo2 libcups2 libdbus-1-3 libdrm2 libegl1 libfontconfig1 \
-      libfreetype6 libgbm1 libglib2.0-0t64 libgtk-3-0t64 libnspr4 libnss3 \
-      libpango-1.0-0 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 \
-      libxdamage1 libxext6 libxfixes3 libxrandr2 libxshmfence1 xvfb xauth \
       curl \
     && rm -rf /var/lib/apt/lists/*
 
 # Python 依赖层：requirements.txt 不变则复用 pip 缓存
 COPY backend/requirements.txt .
-RUN --mount=type=cache,target=/root/.cache/pip \
-    pip install --index-url https://pypi.tuna.tsinghua.edu.cn/simple \
+RUN pip install --index-url https://pypi.tuna.tsinghua.edu.cn/simple \
       --trusted-host pypi.tuna.tsinghua.edu.cn \
       -r requirements.txt
 
-# Playwright Chromium：安装在镜像层中，业务代码变更不会触发重下
-# --mount=type=cache 利用 BuildKit 缓存避免每次构建重下 ~170 MB 浏览器
-RUN --mount=type=cache,target=/root/.cache/ms-playwright,sharing=locked \
-    playwright install chromium
-
 # 源码层：业务代码变更不影响上面所有依赖层
 COPY backend/ .
 
@@ -63,4 +45,4 @@ ENV DATABASE_URL=sqlite:////app/data/app.db
 EXPOSE 8000
 
 ENTRYPOINT ["tini", "--"]
-CMD ["xvfb-run", "-a", "--server-args=-screen 0 1920x1080x24", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]