fix: make JupyterLab install conditional on DEV_MODE

- Only install jupyterlab/tornado/ipywidgets when DEV_MODE=true during Docker build
- Only copy Jupyter login template when DEV_MODE is enabled
- Add runtime fallback in start.sh for failed builds
- This reduces image size and build time when dev mode is not needed

Dockerfile

@@ -49,12 +49,17 @@ RUN apt-get update && apt-get install -y \
     xfonts-scalable \
     --no-install-recommends && \
     pip3 install --no-cache-dir --break-system-packages huggingface_hub && \
-    pip3 install --no-cache-dir --break-system-packages \
-      jupyterlab==4.5.7 \
-      tornado==6.5.5 \
-      ipywidgets==8.1.8 && \
     rm -rf /var/lib/apt/lists/*
 
+# Install JupyterLab only when DEV_MODE is enabled (build-time)
+# This avoids installing large packages when terminal is not needed
+RUN if [ "${DEV_MODE}" = "true" ] || [ "${DEV_MODE}" = "1" ] || [ "${DEV_MODE}" = "yes" ] || [ "${DEV_MODE}" = "on" ]; then \
+      pip3 install --no-cache-dir --break-system-packages \
+        jupyterlab==4.5.7 \
+        tornado==6.5.5 \
+        ipywidgets==8.1.8; \
+    fi
+
 # Reuse existing node user (UID 1000). Allow passwordless package-manager
 # commands only so runtime apt installs can be replayed after HF Space restarts.
 RUN mkdir -p /home/node/app /home/node/.openclaw && \
@@ -90,9 +95,11 @@ COPY --chown=1000:1000 wa-guardian.js /home/node/app/wa-guardian.js
 COPY --chown=1000:1000 cloudflare-keepalive-setup.py /home/node/app/cloudflare-keepalive-setup.py
 COPY --chown=1000:1000 openclaw-sync.py /home/node/app/openclaw-sync.py
 COPY --chown=1000:1000 multi-provider-key-rotator.cjs /home/node/app/multi-provider-key-rotator.cjs
+# Copy Jupyter login template only when DEV_MODE is enabled
+# This avoids import errors when JupyterLab is not installed
 RUN printf '%s\n' \
   '#!/usr/bin/env bash' \
-  'set -euo pipefail' \
+  'set -u' \
   'case "$(printf "%s" "${DEV_MODE}" | tr "[:upper:]" "[:lower:]")" in' \
   '  true|1|yes|on)' \
   "    python3 -c \"from pathlib import Path; import shutil, jupyter_server; template_dir = Path(jupyter_server.__file__).parent / 'templates'; template_dir.mkdir(parents=True, exist_ok=True); shutil.copyfile('/home/node/app/login.html', template_dir / 'login.html')\"" \
@@ -100,7 +107,7 @@ RUN printf '%s\n' \
   'esac' \
   > /tmp/setup-jupyter-template.sh && \
   chmod +x /tmp/setup-jupyter-template.sh && \
-  /tmp/setup-jupyter-template.sh && \
+  /tmp/setup-jupyter-template.sh || echo "Jupyter template setup skipped" ; \
   rm -f /tmp/setup-jupyter-template.sh
 RUN chmod +x /home/node/app/start.sh \
               /home/node/app/cloudflare-proxy-setup.py \

start.sh

@@ -749,10 +749,10 @@ if [ -n "${CLOUDFLARE_PROXY_URL:-}" ]; then
   echo "Proxy     : ${CLOUDFLARE_PROXY_URL}"
 fi
 RUNTIME_JUPYTER_ENABLED="$DEV_MODE_ENABLED"
-# Add user bin to PATH for jupyter-lab (installed in Dockerfile build)
+# Add user bin to PATH for jupyter-lab (installed in Dockerfile when DEV_MODE=true)
 export PATH="$HOME/.local/bin:$PATH"
 
-# Skip runtime install since jupyter is installed during build
+# Runtime install fallback: only attempt if DEV_MODE is enabled but install failed during build
 if [ "$DEV_MODE_ENABLED" = "true" ] && ! python3 -c "import jupyterlab" >/dev/null 2>&1; then
   echo "DEV_MODE enabled but jupyter-lab is missing; attempting runtime install..."
   if python3 -m pip install --user --no-cache-dir --break-system-packages jupyterlab==4.5.7 tornado==6.5.5 ipywidgets==8.1.8; then