When user picks "自动", the client sends styleGuide="auto" to the
server. The orchestrator then runs a lightweight style-selector LLM
call in parallel with the Architect — both only depend on worldSetting,
so there is zero added latency. The selector picks the best-matching
preset from STYLE_MAP based on genre, mood, and setting.
Also moves STYLE_MAP from page.tsx to lib/options.ts so it can be
shared between client and server.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
yuanzonghao