fix(docker): set PICOCLAW_HOME env var to ensure consistent path

When the container runs as a non-root user (picoclaw UID 1000),
os.UserHomeDir() returns /home/picoclaw, causing picoclaw to look
for config at /home/picoclaw/.picoclaw instead of /root/.picoclaw
where the volume is mounted.

Setting PICOCLAW_HOME=/root/.picoclaw ensures picoclaw uses the
correct path regardless of which user the container runs as.

Fixes #2269

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

docker/docker-compose.full.yml

@@ -10,6 +10,8 @@ services:
     container_name: picoclaw-agent-full
     profiles:
       - agent
+    environment:
+      - PICOCLAW_HOME=/root/.picoclaw
     volumes:
       - ../config/config.json:/root/.picoclaw/config.json:ro
       - picoclaw-workspace:/root/.picoclaw/workspace
@@ -30,6 +32,8 @@ services:
     restart: unless-stopped
     profiles:
       - gateway
+    environment:
+      - PICOCLAW_HOME=/root/.picoclaw
     volumes:
       # Configuration file
       - ../config/config.json:/root/.picoclaw/config.json:ro

docker/docker-compose.yml

@@ -11,6 +11,8 @@ services:
     # Uncomment to access host network; leave commented unless needed.
     #extra_hosts:
     #  - "host.docker.internal:host-gateway"
+    environment:
+      - PICOCLAW_HOME=/root/.picoclaw
     volumes:
       - ./data:/root/.picoclaw
     entrypoint: ["picoclaw", "agent"]
@@ -30,6 +32,8 @@ services:
     # Uncomment to access host network; leave commented unless needed.
     #extra_hosts:
     #  - "host.docker.internal:host-gateway"
+    environment:
+      - PICOCLAW_HOME=/root/.picoclaw
     volumes:
       - ./data:/root/.picoclaw
 
@@ -45,6 +49,7 @@ services:
       - launcher
     environment:
       - PICOCLAW_GATEWAY_HOST=0.0.0.0
+      - PICOCLAW_HOME=/root/.picoclaw
     ports:
       - "127.0.0.1:18800:18800"
       - "127.0.0.1:18790:18790"