feat: add 112 PC culture-themed prompts across all 16 challenge types

Satirical and irreverent — cancel culture, DEI absurdity, trigger
warnings, virtue signaling, safe spaces. Mocking the absurdity,
never punching down.

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

server/src/engine/challenges.ts

@@ -2,6 +2,7 @@ import { TEMPLATES, type ChallengeTemplate, type PromptEntry, type PromptTheme,
 import { EXTRA_PROMPTS } from './challenges-extra.js'
 import { BITCOIN_PROMPTS } from './challenges-bitcoin.js'
 import { CONSPIRACY_PROMPTS } from './challenges-conspiracy.js'
+import { PC_PROMPTS } from './challenges-pc.js'
 import { pick } from '../lib/utils.js'
 
 export interface Challenge {
@@ -27,6 +28,8 @@ for (const t of TEMPLATES) {
   if (btc) t.prompts.push(...btc)
   const conspiracy = CONSPIRACY_PROMPTS[t.type]
   if (conspiracy) t.prompts.push(...conspiracy)
+  const pc = PC_PROMPTS[t.type]
+  if (pc) t.prompts.push(...pc)
 }
 
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