fix: run Happy daemon as app user, not root

When init-repo.sh starts the happy daemon as root, HOME=/root so
Happy and Claude Code can't find credentials stored in /home/user.
The mobile app works when the user manually runs happy from a VSCode
terminal (as the user user) because the right home dir is in scope.

Use sudo -u with -E (preserve environment) so the daemon runs as the
correct user while still inheriting the pod's env vars (HAPPY_SERVER_URL,
HAPPY_WEBAPP_URL, ANTHROPIC_API_KEY, etc.).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -37,8 +37,8 @@ RUN curl -fsSL https://deb.nodesource.com/setup_lts.x | bash - && \
     apt-get install -y nodejs && \
     rm -rf /var/lib/apt/lists/*
 
-# Install Happy Coder globally
-RUN npm install -g happy-coder
+# Install Happy Coder and Claude Code globally
+RUN npm install -g happy-coder @anthropic-ai/claude-code
 
 # Install Antigravity (Google's Project IDX / Cloud Code alternative)
 # Note: Antigravity might be packaged differently - adjust as needed
@@ -58,9 +58,11 @@ RUN groupadd -g 1000 user && \
 RUN mkdir -p /workspace && \
     chown -R user:user /workspace
 
-# Copy startup script
+# Copy startup scripts
 COPY --chmod=755 scripts/startapp.sh /startapp.sh
 COPY --chmod=755 scripts/init-repo.sh /usr/local/bin/init-repo
+# Fix app user shell after baseimage-gui creates it at runtime
+COPY --chmod=755 scripts/cont-init-user.sh /etc/cont-init.d/20-fix-user-shell.sh
 
 # Set working directory
 WORKDIR /workspace

scripts/cont-init-user.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+# Fix the app user (UID 1000) created by baseimage-gui at runtime.
+# baseimage-gui sets shell=/sbin/nologin and home=/dev/null, which
+# prevents VSCode from opening terminals.
+usermod -s /bin/bash app
+usermod -d /home/user app

scripts/init-repo.sh

@@ -59,11 +59,13 @@ chown -R "$RUN_UID:$RUN_GID" "$WORKSPACE_DIR"
 mkdir -p "$HOME"
 chown "$RUN_UID:$RUN_GID" "$HOME"
 
-# Start Happy Coder daemon
+# Start Happy Coder daemon as the app user so it can access user credentials
+# (running as root means HOME=/root, Claude Code and Happy config would be missing)
 echo "Starting Happy Coder..."
-cd "$WORKSPACE_DIR"
 
-happy daemon start || echo "Happy Coder daemon failed to start, continuing anyway..."
+RUN_USER=$(id -nu "$RUN_UID" 2>/dev/null || echo "user")
+sudo -u "$RUN_USER" -E sh -c "cd '$WORKSPACE_DIR' && happy daemon start" \
+    || echo "Happy Coder daemon failed to start, continuing anyway..."
 
 echo "Happy Coder daemon started"