test: verify correct/incorrect feedback in respond endpoint (BUG-1)

Tests confirm checkAnswer integration: correct answer returns
correct: true, wrong answer returns correct: false.

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

server/src/routes/fights-respond.test.ts

@@ -0,0 +1,78 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest'
+import { Hono } from 'hono'
+import { fightsRouter } from './fights.js'
+import { waitForHumanResponse, submitHumanResponse, clearAllPending } from '../engine/human-responses.js'
+import type { Challenge } from '../engine/challenges.js'
+
+const app = new Hono()
+app.route('/api/fights', fightsRouter)
+
+const testChallenge: Challenge = {
+  type: 'speed_blitz',
+  label: 'Speed Blitz',
+  prompt: 'What is 2+2?',
+  answers: ['4'],
+  scoring: 'factual',
+  timeout_ms: 8000,
+  baseDamage: 20,
+  choices: ['4', '3', '5'],
+}
+
+afterEach(() => {
+  clearAllPending()
+})
+
+describe('POST /fights/:fightId/respond/:botId', () => {
+  it('returns correct: true for correct answer', async () => {
+    const fightId = `fight-respond-correct-${Date.now()}`
+    const botId = 'bot-respond-test'
+
+    // Set up pending challenge
+    const { promise } = waitForHumanResponse(fightId, botId, testChallenge, 1)
+
+    const res = await app.request(`/api/fights/${fightId}/respond/${botId}`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ answer: '4' }),
+    })
+
+    expect(res.status).toBe(200)
+    const json = await res.json() as { accepted: boolean; correct: boolean }
+    expect(json.accepted).toBe(true)
+    expect(json.correct).toBe(true)
+
+    await promise // consume
+  })
+
+  it('returns correct: false for wrong answer', async () => {
+    const fightId = `fight-respond-wrong-${Date.now()}`
+    const botId = 'bot-respond-wrong'
+
+    const { promise } = waitForHumanResponse(fightId, botId, testChallenge, 1)
+
+    const res = await app.request(`/api/fights/${fightId}/respond/${botId}`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ answer: 'banana' }),
+    })
+
+    expect(res.status).toBe(200)
+    const json = await res.json() as { accepted: boolean; correct: boolean }
+    expect(json.accepted).toBe(true)
+    expect(json.correct).toBe(false)
+
+    await promise
+  })
+
+  it('returns 404 for no pending challenge', async () => {
+    const res = await app.request('/api/fights/nonexistent/respond/nonexistent', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ answer: 'test' }),
+    })
+
+    expect(res.status).toBe(404)
+    const json = await res.json() as { error: string }
+    expect(json.error).toContain('No pending challenge')
+  })
+})