World page: live WebGL Gource-style visualization (Phases A+B)

Replaces the static React-Flow world forest with a real-time WebGL view of the
swarm working, plus the live event contract that feeds it.

Phase A — the live contract + feed:
- frontend/src/lib/live/taxonomy.ts — the 13-event Clawmates Event Taxonomy as
  typed TS (the shared World/Observe contract).
- frontend/src/lib/live/useClawmatesLive.ts — native shared-singleton live client
  (EventSource to /api/world/live, typed fan-out, replay-of-last-state to late
  subscribers, refcounted, synthetic fallback so views are always alive).
- crates/cm-api/src/routes/world.rs — GET /api/world/live, authed + workspace-
  scoped SSE emitting the taxonomy (real agent.status from live-container state,
  a topology.update of the workspace's agents, telemetry with real doorsPending),
  mirroring run_events_sse. normalize() seam documented for run_events->world.touch.

Phase B — the WebGL engine:
- frontend/src/components/world/engine.ts — Gource-inspired force-directed model:
  org/company/team tree (sibling repulsion + parent spring + friction), agent
  pawns that converge on the touched node and beam it, world nodes that glow with
  heat and fade when idle. Framework-agnostic (renderer-independent) state+math.
- frontend/src/components/world/WorldCanvas.tsx — three.js scene (ortho cam,
  UnrealBloom), render loop syncing engine state, camera auto-fit, HTML labels,
  raycast click->select, Hierarchy/Flat/Live formation switch.
- Dashboard.tsx: swap <WorldFlow/> -> <WorldCanvas/> at the world-tier seam
  (shared claw-tier pieces untouched; WorldFlow.tsx kept for now).
- Adds three (+ @types/three).

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

crates/cm-api/src/routes/mod.rs

@@ -23,3 +23,4 @@ pub mod team;
 pub mod teams;
 pub mod terminal;
 pub mod topology;
+pub mod world;