Two coordinated additions to the 绘画风格 modal so the user can shape
the styleGuide that ultimately feeds every painter/director agent,
without ever mutating the source-of-truth STYLE_MAP:
1. New "自定义" entry sits right under "自动" — opens an inline
textarea where the user can write a free-form styleGuide (mix of
Chinese / English, sent verbatim to the image model). Stored as
in-memory state on HomePage (customStyleGuide), so refresh clears
it — fits the "one-shot session" semantics of this UI.
2. Every preset card now exposes a small pencil on the right of its
prompt area. Clicking it inlines a textarea pre-filled with the
current effective prompt (override if any, else STYLE_MAP value).
Saving writes to styleOverrides[name] — a separate in-memory
record keyed by preset name. STYLE_MAP is never written to.
start() selects the styleGuide with this priority:
customStyleGuide (when 自动→自定义)
> styleOverrides[artStyle]
> STYLE_MAP[artStyle]
> STYLE_MAP[DEFAULT_STYLE]
UX polish in the same change:
- 标题永远只读 (only the prompt is editable)
- 只读 prompt 行去掉边框/底色，回归纯文字 + 右上铅笔
- 「自动」项无 prompt 可编辑，标题下直接放一行说明
- 编辑态 textarea 用 ember 边框作为"正在编辑"视觉反馈
- 「保存并选用」一并 onPick + close；「还原默认」清除该预设的 override
- 搜索框同时匹配标题/原名/prompt 内容
- 移除「自由输入」标签 (now visually redundant with the pencil affordance)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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