fix: increase maxTokens limits to reduce truncation failures

Default 200→400, invention 300→600, desireGeneration 500→800,
backstoryAndDesires 800→1200. Can trim back once we have usage data.

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

server/src/config/__tests__/llmConfig.test.ts

@@ -18,7 +18,7 @@ describe('llmConfig', () => {
     const config = getLlmConfig();
     expect(config.model).toBe('');
     expect(config.fallbackModel).toBeNull();
-    expect(config.maxTokens).toBe(200);
+    expect(config.maxTokens).toBe(400);
     expect(config.temperature).toBe(0.8);
     expect(config.requestsPerMinute).toBe(20);
     expect(config.timeoutMs).toBe(15000);

server/src/config/llmConfig.ts

@@ -15,7 +15,7 @@ export function getLlmConfig(): LlmConfig {
     apiKey,
     model: process.env.LLM_MODEL ?? '',
     fallbackModel: process.env.LLM_FALLBACK_MODEL ?? null,
-    maxTokens: 200,
+    maxTokens: 400,
     temperature: 0.8,
     requestsPerMinute: 20,
     timeoutMs: 15000,

server/src/llm/templates.ts

@@ -42,7 +42,7 @@ export const templates: Record<string, PromptTemplate> = {
 
   invention: {
     name: 'invention',
-    maxTokens: 300,
+    maxTokens: 600,
     jsonResponse: true,
     systemPrompt:
       'Given available materials and a settler\'s stats, consider 3 possible inventions, ' +
@@ -69,7 +69,7 @@ export const templates: Record<string, PromptTemplate> = {
 
   backstoryAndDesires: {
     name: 'backstoryAndDesires',
-    maxTokens: 800,
+    maxTokens: 1200,
     jsonResponse: true,
     systemPrompt:
       'Write a brief backstory (1-2 sentences) and 1-2 initial desires for this settler. ' +
@@ -92,7 +92,7 @@ export const templates: Record<string, PromptTemplate> = {
 
   desireGeneration: {
     name: 'desireGeneration',
-    maxTokens: 500,
+    maxTokens: 800,
     jsonResponse: true,
     systemPrompt:
       'Generate a new personal desire for this settler based on their personality and recent experiences.',