feat(ssa): Complete T-test end-to-end testing with 9 bug fixes - Phase 1 core 85% complete. R service: missing value auto-filter. Backend: error handling, variable matching, dynamic filename. Frontend: module activation, session isolation, error propagation. Full flow verified.

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

r-statistics-service/Dockerfile

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+FROM rocker/r-ver:4.3
+
+LABEL maintainer="dev-team@aiclinicalresearch.com"
+LABEL version="1.0.1"
+LABEL description="SSA-Pro R Statistics Service"
+
+# 安装系统依赖（包括 R 包编译所需的库）
+RUN apt-get update && apt-get install -y \
+    libcurl4-openssl-dev \
+    libssl-dev \
+    libxml2-dev \
+    libsodium-dev \
+    zlib1g-dev \
+    libnlopt-dev \
+    liblapack-dev \
+    libblas-dev \
+    gfortran \
+    pkg-config \
+    cmake \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# 直接安装 R 包（简化方案，避免 renv 版本冲突）
+RUN R -e "install.packages(c( \
+    'plumber', \
+    'jsonlite', \
+    'ggplot2', \
+    'glue', \
+    'dplyr', \
+    'tidyr', \
+    'base64enc', \
+    'yaml', \
+    'car', \
+    'httr' \
+), repos='https://cloud.r-project.org/', Ncpus=2)"
+
+# ===== 安全加固：创建非特权用户 =====
+RUN useradd -m -s /bin/bash appuser
+
+WORKDIR /app
+
+# 复制应用代码
+COPY plumber.R plumber.R
+COPY utils/ utils/
+COPY tools/ tools/
+COPY tests/ tests/
+
+# 设置目录权限
+RUN chown -R appuser:appuser /app
+
+# ===== 切换到非特权用户 =====
+USER appuser
+
+EXPOSE 8080
+
+# 环境变量
+ENV DEV_MODE="false"
+
+# 健康检查
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD curl -f http://localhost:8080/health || exit 1
+
+# 启动服务（不清理 /tmp，避免权限问题）
+CMD ["R", "-e", "plumber::plumb('plumber.R')$run(host='0.0.0.0', port=8080)"]