test: add timeout draw and perfect victory ELO tests to lifecycle suite

- Both bots timing out every round: verified draw with zero damage
- Perfect victory (10-0): verified correct ELO calculation

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

server/src/engine/lifecycle.test.ts

@@ -505,6 +505,62 @@ describe('fight lifecycle', () => {
     }
   })
 
+  it('both bots timing out every round produces draw with zero damage', () => {
+    const botA = { id: 'to-a', name: 'TimeoutA' }
+    const botB = { id: 'to-b', name: 'TimeoutB' }
+    const usedTypes = new Set<string>()
+    const timeout = { answer: '', timeMs: 8000, timedOut: true, error: false }
+
+    for (let r = 0; r < 10; r++) {
+      const challenge = pickChallenge(usedTypes, null, undefined, r + 1)
+      usedTypes.add(challenge.type)
+      const result = scoreRound(challenge, botA, botB, timeout, timeout, null, 0, 0)
+
+      // Both timeout = draw, no damage
+      expect(result.winnerId).toBeNull()
+      expect(result.botADamage).toBe(0)
+      expect(result.botBDamage).toBe(0)
+      expect(result.botAScore).toBe(0)
+      expect(result.botBScore).toBe(0)
+    }
+  })
+
+  it('perfect victory (10-0) — correct ELO calculation', () => {
+    // Bot A wins every round, Bot B always wrong
+    const eloA = 1200
+    const eloB = 1200
+
+    // Simulate 10 rounds where A always correct, B always wrong
+    const botA = { id: 'pv-a', name: 'PerfA' }
+    const botB = { id: 'pv-b', name: 'PerfB' }
+    const usedTypes = new Set<string>()
+    let aRoundWins = 0
+
+    for (let r = 0; r < 10; r++) {
+      const challenge = pickChallenge(usedTypes, null, undefined, r + 1)
+      usedTypes.add(challenge.type)
+      const resp = mockResponse(challenge, 'confident', 1800)
+      const result = scoreRound(
+        challenge, botA, botB,
+        { answer: resp.answer, timeMs: 200, timedOut: false, error: false },
+        { answer: 'wrong answer completely', timeMs: 200, timedOut: false, error: false },
+        null, aRoundWins, 0,
+      )
+      if (result.winnerId === botA.id) aRoundWins++
+    }
+
+    expect(aRoundWins).toBeGreaterThan(5) // A should win most rounds
+
+    // ELO calculation for equal-elo matchup with clear winner
+    const { newWinnerElo, newLoserElo } = calculateElo(eloA, eloB)
+    expect(newWinnerElo).toBeGreaterThan(eloA)
+    expect(newLoserElo).toBeLessThan(eloB)
+    // ELO change should be moderate for equal-elo matchup
+    const change = newWinnerElo - eloA
+    expect(change).toBeGreaterThan(5)
+    expect(change).toBeLessThan(40)
+  })
+
   it('fight loop throughput: >500 fights/second (no I/O)', () => {
     const fights = 5000
     const start = performance.now()