[agency] Harden CLJS hair agency as a worker-safe state planner

[meekmachine]

Goal

Finish Hair as a ClojureScript worker-safe state planner that emits host commands for material, part, outline, and physics updates without touching Three/Loom3 objects directly.

Current state

Polyester already has src-cljs/latticework/hair.cljs, in-process creation, worker client methods, color presets, part state, and physics config planning. The old TypeScript service still bridges into actual LoomLarge/Loom3 objects.

This mirrors the Latticework research issue: meekmachine/Latticework#40.

Clojure-way direction

• Move serializable hair color, eyebrow color, outline, visibility, part scale/position, object registration metadata, and physics config into CLJS planner state.
• Main thread applies emitted applyHairState and applyHairPhysics outputs to materials, meshes, morphs, and runtime physics.
• Keep worker outputs plain data and avoid object references.
• Preserve current public behavior through a JS/TS compatibility adapter.

Acceptance criteria

• Worker state snapshots are serializable and include hair state, object summaries, and physics config.
• Worker emits object-specific host commands for color/outline/visibility/scale/position and physics config changes.
• No worker code references Loom3, Three objects, DOM, or global debug APIs.
• Existing hair behavior remains unchanged through the main-thread adapter.
• Add parity tests for color presets, custom colors, object registration, part visibility/scale/position, outline, reset, and physics config.