Alpha 0.3.9: Canonical Genesis forest layout

[ael-dev3]

Summary

• Stacks on Alpha 0.3.9: Gold Mine wagon expeditions #51 and retargets the forest work to the undeployed Alpha 0.3.9 candidate.
• Appends a public, server-seeded shared visual forest catalog at schema refs 25–26, after the v5 Gold schema at refs 20–24.
• Every player receives the same 210 fixed tree instances from 22 provenance-pinned families in the preserved Genesis founding Lowlands. High, Balanced, and Compact change only GLB LOD.
• Missing, partial, malformed, or unseeded paired public rows render no player forest; observer-only local preview stays opt-in.
• Forests remain decorative: no changes to canonical terrain, passability, collision, routes, Gold sites, castle slots, ownership, resources, or economy.
• The outer 8,739 generation-v3 cells intentionally remain unpopulated pending a separate reviewed layout version.

Safety and rollout

No merge, Pages deployment, SpacetimeDB publication, production world expansion, resource/Gold-site setup, forest seed, DNS change, tag, or release was performed.

After separately approved steps: publish the additive v6 module with deletion disabled; complete and verify the reviewed v3 world and v5 Gold setup; separately seed the v6 forest layout; verify one layout row, exactly 210 instance rows, pinned digests, and then deploy the exact Pages SHA.

Verification

• Frontend: vitest run — 154 files / 1,521 tests
• Server: tsx --test spacetimedb/tests/*.test.ts — 143 tests
• TypeScript, bindings, v6 fixture build, full additive migration proof, asset verification, production build/exclusion checks, and license policy all passed.