Add Fortune Desk Caishen theme candidate

[ChannelerH]

Summary

Adds fortune-desk-caishen, a public-safe ACT theme candidate adapted from the existing Caishen Readable skin direction into this repository source-art flow. The theme keeps the left half calm for readable controls and places the Caishen-inspired visual story on the right.

Preview:

Installable public-safe skin pack:

https://codex-theme-gallery.howardhua.chatgpt.site/themes/caishen-readable?utm_source=rwang23-awesome-codex-theme-pr&utm_medium=github-pr&utm_campaign=fortune-desk-caishen

Source pack repository:

https://github.com/ChannelerH/codex-skin-packs

This PR includes:

• themes/source-art/fortune-desk-caishen.png at 1536 x 1024
• provenance with source and prompt hashes
• catalog entry under china-life-favorites-01
• source-art job prompt
• light and dark readable token sets

Verification

Focused local validation passed:

• source art dimensions: 1536 x 1024
• source SHA-256 matches provenance
• prompt SHA-256 matches commonPrompt plus Scene brief
• catalog and job IDs are unique
• light and dark text, muted, accent contrast checks pass
• git diff --check

I am not claiming this is a verified real Beta capture yet. It is a theme candidate/source-art contribution for the ACT generation and review flow, with no private Codex screenshots and no official OpenAI assets.

[rwang23]

Thanks for moving the proposal into a source-art PR. The visual direction and readability goal make sense, and I appreciate the candid note that it is not yet registry-ready.

I have moved this PR back to Draft while it is brought up to the current ACT candidate contract. This is a requirements update, not a rejection of the concept.

Before we can review it for the public registry:

1. Replace the submitted 1536 x 1024 PNG with a new original 2560 x 1440 (16:9), or larger, source-art file. The named legacy-size exception applies only to the pre-existing catalogue, not new themes.
2. Keep the quiet left-side working safe zone, but remove the laptop-screen/interface-like marks from the art. Source art must not depict product UI, text, or logos.
3. Add an explicit contributor attestation naming the asset author, original source link, licence, modification method, and redistribution scope. A repository-level MIT statement alone does not identify the submitted image's author or source.
4. Rebase/recreate the generated metadata against current main; the branch currently conflicts with it.
5. The public registry also requires real, privacy-safe evidence for both light and dark modes from the exact supported Codex Beta runtime, with action-after readback and cleanup. Preview/generated art cannot substitute for those captures.

We will not fabricate the runtime-capture evidence. If you can supply items 1-3, please update the PR and ping us; we can then coordinate the current-main integration and the capture gate.