Fix/WA reconnect, container perms, assist name in env (#297)

* fix: WA 515 stream error reconnect exiting early before key sync

Pass isReconnect flag on 515 reconnect so the registered-creds check
doesn't bail out before the handshake completes (caused "logging in..."
hang after successful pairing).

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

* fix: container permission errors on Docker with non-default uid

Make /home/node world-writable in the Dockerfile so the SDK can write
.claude.json. Add --user flag matching host uid/gid in container-runner
so bind-mounted files are accessible. Skip when running as root (uid 0),
as the container's node user (uid 1000), or on native Windows.

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

* fix: write ASSISTANT_NAME to .env during setup

When a custom assistant name is chosen, persist it to .env so config.ts
picks it up at runtime. Uses temp file for cross-platform sed
compatibility (macOS/Linux/WSL).

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

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/setup/scripts/06-register-channel.sh

@@ -79,6 +79,15 @@ if [ "$ASSISTANT_NAME" != "Andy" ]; then
     fi
   done
 
+  # Add ASSISTANT_NAME to .env so config.ts picks it up
+  ENV_FILE="$PROJECT_ROOT/.env"
+  if [ -f "$ENV_FILE" ] && grep -q '^ASSISTANT_NAME=' "$ENV_FILE"; then
+    sed "s/^ASSISTANT_NAME=.*/ASSISTANT_NAME=$ASSISTANT_NAME/" "$ENV_FILE" > "$ENV_FILE.tmp" && mv "$ENV_FILE.tmp" "$ENV_FILE"
+  else
+    echo "ASSISTANT_NAME=$ASSISTANT_NAME" >> "$ENV_FILE"
+  fi
+  log "Set ASSISTANT_NAME=$ASSISTANT_NAME in .env"
+
   NAME_UPDATED="true"
 fi