Use Voyage embeddings by default

Polish pass: fullscreen, ambient, controls grouping

feat: agent-based tour generation with live trace panel

docs: add persistent memory + README generator to README

docs: note domain-separated router architecture in README

Rewrite README: accurate features, current stack, all 10 MCP tools, full pipeline

fix: use valid HF color values (yellow→red)

chore: update HF Space metadata — compass emoji, terracotta colors

Update README.md

rebrand: update all display name references to Cartographer

fix: add HuggingFace Space YAML config to README

checkpoint: pre-UI-overhaul state