Add thumbnail field to Listing card with thumbnail URL override

[lucaslyl]

linear: https://linear.app/cardstack/issue/CS-10589/add-logo-field-to-listing-card-with-card-thumbnail-url-override

Add a listing thumbnail field (linksTo ImageDef) to the Listing card definition.

Screen.Recording.2026-04-03.at.2.58.07.PM.mov

[lucaslyl]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. More of your lovely PRs please.

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[github-actions]

Host Test Results

    1 files  ± 0      1 suites  ±0   2h 14m 55s ⏱️ -55s
2 037 tests  - 61  2 022 ✅  - 61  14 💤  - 1  0 ❌ ±0  1 🔥 +1 
2 037 runs   - 61  2 021 ✅  - 62  14 💤  - 1  1 ❌ +1  1 🔥 +1 

For more details on these errors, see this check.

Results for commit 02a5bef. ± Comparison against base commit 68b4d1a.

This pull request removes 62 and adds 1 tests. Note that renamed tests count towards both.

Chrome ‑ Integration | ai-assistant-panel | skills: adding skill card results in new command definitions being added but not duplicated
Chrome ‑ Integration | ai-assistant-panel | skills: ensures command definitions are reuploaded only when content changes (different rooms)
Chrome ‑ Integration | ai-assistant-panel | skills: ensures command definitions are reuploaded only when content changes (same room)
Chrome ‑ Integration | ai-assistant-panel | skills: skill pill menu opens the skill card
Chrome ‑ Integration | ai-assistant-panel | skills: skill pill menu opens the skill card while in code mode
Chrome ‑ Integration | ai-assistant-panel | skills: updated command definition results in new event and updated room state
Chrome ‑ Integration | ai-assistant-panel | skills: updated skill card instructions result in new event and updated room state when code patch is completing
Chrome ‑ Integration | ai-assistant-panel | skills: updated skill card instructions result in new event and updated room state when command is completing
Chrome ‑ Integration | ai-assistant-panel | skills: updated skill card instructions result in new event and updated room state when sending message
Chrome ‑ Integration | operator-mode | ui: can open and close search sheet
…

Chrome ‑ error

♻️ This comment has been updated with latest results.