Each agent profile now gets a dedicated workspace directory
(~/.super-multica/workspace/{profileId}) used as the default CWD
for tool operations. Supports override via MULTICA_WORKSPACE_DIR
env var or config.json workspaceDir field. The workspace path is
injected into system prompt and runtime info.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>