Submission prep: Caishen Readable public-safe .codexskin draft

[ChannelerH]

I am preparing a public-safe .codexskin submission for a light fortune-themed skin and wanted to track the gap before opening a PR.

Draft source:
https://github.com/ChannelerH/codex-skin-packs/tree/main/codexskin-drafts/caishen-readable

Current state:

• theme.json is schemaVersion 2.
• theme.css is scoped under html.codex-theme-studio.
• Public artwork has been converted to WebP and is well under the asset size limit.
• codexVerified is recorded from local app version 26.715.61943.
• The source folder is recognized by studio/bin/codex-theme.mjs themes.
• The pack gate currently fails only because previews/home.webp is missing.

Current pack-gate output:

{
  "ok": false,
  "problems": [
    "missing `previews` — run `codex-theme preview-shot <id>` first"
  ]
}

I am intentionally not submitting a PR yet because the preview requirement says the cover must be a real screenshot of a running themed Codex home route, not concept art or a private workspace screenshot.

The remaining work on my side is to capture a public-safe home preview with private sidebar content collapsed, then run pack successfully before opening a PR.

If there is a preferred workflow for contributors who are already running Codex inside an active private workspace but need to generate a clean public preview, I would follow that before submitting.

[Wangnov]

Thanks for checking before submitting. The preferred workflow is to navigate to the Codex home route, manually collapse the pinned/projects/tasks sidebar sections, then run preview-shot; the tool intentionally does not auto-hide sidebar content. Once the public-safe preview is added and pack passes, please feel free to open the PR.