- mcp_servers.d/navi_ui.json: one-line tool call format, explicit component_name=card_grid, minimal schema, session_id auto-injected.

- navi/mcp/ui_server.py: flatten SERVER_INSTRUCTIONS to a strict JSON schema + numbered hard rules, remove mixed-format examples.

- navi/profiles/realtor/system_prompt.txt: replace YAML-ish example with exact JSON payload, numbered rules, clear session_id auto-injected note.

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