Star-cruise smooth galaxy + polish: clusters=stars, planets=genres, legible aliens

Two-level galaxy navigation + the polish batch from live feedback:

GALAXY — 31 clusters = colored labeled SUNS (InstancedMesh, 1 draw call) at their star coords; 250 genres = PLANETS. Dominant genre's planet is the target.

SMOOTH — removed the beat-driven camera bob/drift; damped frame-rate-independent transit follow (measured zero per-frame jitter).

ALIENS — contiguous (neck/clavicle/shoulder/antenna-tip/sash close every gap); FLOOR collision (liftY so feet rest on ground, groove only hops up); PER-ALIEN colour/outfit (same-genre seeds -> distinct palettes)

SHADERS SIMPLIFIED — material vocab reduced to the readable set (no wireframe / no pure-mesh); post-fx capped to gentle levels (no over-processing).

Verified: all 7 star-cruise suites + full-boot gate PASS first-hand (no crash, 🛸, starmap); GX1-7 (suns/no-ship/HUD/smooth/floor/drummer-on-fill/gated-dancers)…

▶ Play it: Kettle Eschaton — parked on the genre this change names https://stellate.app/?genre=folk&seed=7148&path=1854.5710,1873.5743,1835.5743&xdur=13.122

184a5b0 https://github.com/aboard-io/stellate/commit/184a5b046b79358f79528fdc0b5c4abcd1713376