Todo

Condensed from TODO.md at build time: 2 open item(s), 11 completed.

• In-browser performance budget: texture memory and interaction smoothness of the globe page (the assets themselves are decided: 720×360 Float32 grid + hypsometric PNG).
• Deeper pyramid levels (z6+, generated on demand with `--tile` and added to the index) and quad-sphere per-patch subdivision for true browser-scale LOD. — Episode files written (2026-08-26): `prompts/episodes/02-deeper-pyramid-levels.md` (z6+ on demand) and `prompts/episodes/03-quad-sphere-subdivision.md` (per-patch subdivision); both advance phase 2 (`PHASES.md`).