feat(thought): add thought config and npc-thought socket event type

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

server/src/config/thoughtConfig.ts

@@ -0,0 +1,14 @@
+export const thoughtConfig = {
+  /** Ticks between periodic thought generation cycles (90s at 10 ticks/s) */
+  periodicIntervalTicks: 900,
+  /** Minimum ticks between thoughts for any single NPC */
+  perNpcCooldownTicks: 900,
+  /** Max NPCs per batched LLM request */
+  maxBatchSize: 8,
+  /** Hunger/energy threshold below which a need is "critical" */
+  needCriticalThreshold: 20,
+  /** How long emoji shows on screen (ms) */
+  emojiHoldDurationMs: 4000,
+  /** Emoji fade in/out duration (ms) */
+  emojiFadeDurationMs: 500,
+};

shared/src/types.ts

@@ -197,6 +197,7 @@ export interface ServerEvents {
   'narration-event': (data: NarrationEvent) => void;
   'narration-update': (data: { id: number; narration: string }) => void;
   'narration-history': (data: NarrationEvent[]) => void;
+  'npc-thought': (data: { entityId: EntityId; text: string; emoji: string }) => void;
 }
 
 // Client -> Server events