Update 2.22

v2.22.0BETASeymour

SPHERE GRID BUILDER (v1, from scratch): the proven lib finally in a UI

• The grid topology (clusters/nodes/links/positions) was HARD-LOCKED; SphereGridLayoutBuilder+WriteLayout (gate --spheregrid-build-rt0 PASS) existed with no screen. New "Sphere Grid Builder 🧩" nav (Core Authoring, next to the Sphere Grid Explorer) → form-based: Add Cluster / Add Node / Add Link → live lists → Validate (the lib's range-check) → Build & Save (.dat via WriteLayout, byte-safe, written to the project root or exe dir). The "create a sphere grid from the ZERO" headline is finally usable. Honest v1: no visual canvas (numeric positions); editing EXISTING node values stays in the Sphere Grid Explorer. In-game re-verification (owner's doubt): WriteLayout is byte-exact (RT0 round-trip proven), BUT loading a NEW topology in-game stays UNPROVEN — offline-safe ≠ the engine accepting a grid it never shipped (honest on-screen banner). Build 0 errors

v2.21.0