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

Satirical and fun conspiracy culture humor — MK-Ultra, Area 51,
flat earth, tinfoil hats, Bigfoot, UFOs, surveillance. Never endorsing.

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

server/src/engine/challenges.ts

@@ -1,6 +1,7 @@
 import { TEMPLATES, type ChallengeTemplate, type PromptEntry, type PromptTheme, type PromptDifficulty } from './challenge-data.js'
 import { EXTRA_PROMPTS } from './challenges-extra.js'
 import { BITCOIN_PROMPTS } from './challenges-bitcoin.js'
+import { CONSPIRACY_PROMPTS } from './challenges-conspiracy.js'
 import { pick } from '../lib/utils.js'
 
 export interface Challenge {
@@ -24,6 +25,8 @@ for (const t of TEMPLATES) {
   if (extras) t.prompts.push(...extras)
   const btc = BITCOIN_PROMPTS[t.type]
   if (btc) t.prompts.push(...btc)
+  const conspiracy = CONSPIRACY_PROMPTS[t.type]
+  if (conspiracy) t.prompts.push(...conspiracy)
 }
 
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