feat(options): add third gender option "X" for universal gender

- Add "X" to GENDERS array in lib/options.ts
- Add example phrases for "X" gender (sci-fi themed)
- Make "X" use same preset cards as male gender
- Map "X" to "通用性别" when transmitting to AI
- Add "X" to DISPLAY_ORDER (same as male)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

lib/options.ts

@@ -5,7 +5,7 @@
 // origin is what keeps the "content-free" events honest — an event field can
 // only ever be one of these fixed labels, never free-form player text.
 
-export const GENDERS = ["男性向", "女性向"] as const;
+export const GENDERS = ["男性向", "女性向", "X"] as const;
 
 export const ART_STYLES = [
   // 特殊选项