feat: add emacs-nox to base ai/Dockerfile

ai/Dockerfile

@@ -0,0 +1,24 @@
+FROM debian:13.4
+
+# Install uv (Python package manager), curl, poppler-utils, imagemagick, and emacs-nox
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        curl \
+        poppler-utils \
+        imagemagick \
+        emacs-nox && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install uv if not already present (debian:13.4 doesn't ship it)
+COPY --from=ghcr.io/astral-sh/uv:latest /usr/local/bin/uv /usr/local/bin/uv
+RUN uv --version
+
+# Verify all expected tools are available
+RUN curl --version && \
+    pdftotext -v 2>&1 | head -1 && \
+    pdfinfo -v 2>&1 | head -1 && \
+    pdftoppm -v 2>&1 | head -1 && \
+    convert --version | head -1 && \
+    identify --version | head -1
+
+CMD ["/bin/bash"]