feat: add Kimi & Perplexity as visible Workshop agents (#11)

- agent-defs.js: add Kimi (Long Context Analysis, cyan) and Perplexity
  (Real-time Research, pink) with world positions at (-10,-10) and (10,-10)
- agents.js: add 3D geometric bodies for both agents — Kimi as an
  octahedron with orbital rings, Perplexity as an icosahedron with
  scanning tori; idle/active/dormant animations driven by agent state;
  restrict Timmy mood derivation to workshop agents only
- hud-labels.js: show specialization and last-task summary in inspect
  popup; export setLabelLastTask() for WS updates
- websocket.js: handle agent_task_summary messages; call setLabelLastTask
  on job_completed events
- world-state.ts: add kimi and perplexity to initial agentStates; restrict
  _deriveTimmy() to workshop agents only
- event-bus.ts: add AgentExternalEvent type for external agent state changes
- events.ts: handle agent:external_state bus events, broadcast agent_state
  and agent_task_summary WS messages

Fixes #11

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

artifacts/api-server/src/routes/events.ts

@@ -269,6 +269,21 @@ function translateEvent(ev: BusEvent): object | null {
         text: ev.text,
       };
 
+    // ── External agent state (Kimi, Perplexity) (#11) ─────────────────────────
+    case "agent:external_state": {
+      updateAgentWorld(ev.agentId, ev.state);
+      void logWorldEvent(
+        `agent:${ev.state}`,
+        `${ev.agentId} is now ${ev.state}${ev.taskSummary ? `: ${ev.taskSummary.slice(0, 80)}` : ""}`,
+        ev.agentId,
+      );
+      const msgs: object[] = [{ type: "agent_state", agentId: ev.agentId, state: ev.state }];
+      if (ev.taskSummary) {
+        msgs.push({ type: "agent_task_summary", agentId: ev.agentId, summary: ev.taskSummary });
+      }
+      return msgs;
+    }
+
     default:
       return null;
   }