Ship Meshtastic Chat UX, embedded Infonet/SHELL panels, and Docker dev polish.

Rename Mesh Chat to Meshtastic Chat, embed the Infonet terminal with Arti/Tor warmup, improve the agent shell PTY (git in the backend image, operator PATH), and add docker-compose.override for local image builds. Gitignore Hermes Agent runtime installs.

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

backend/Dockerfile

@@ -27,6 +27,7 @@ WORKDIR /app
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates \
     curl \
+    git \
     tor \
     && curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
     && apt-get install -y --no-install-recommends nodejs \
@@ -72,7 +73,7 @@ ENV PRIVACY_CORE_LIB=/app/libprivacy_core.so
 # Create a non-root user for security
 # Grant write access to /app so the auto-updater can extract files
 # Pre-create /app/data so mounted volumes inherit correct ownership
-RUN adduser --system --uid 1001 backenduser \
+RUN adduser --system --uid 1001 --home /app backenduser \
     && mkdir -p /app/data \
     && chown -R backenduser /app \
     && chmod -R u+w /app