Playground instance previewed in edit view should save changes

[FadhlanR]

• Refactored the auto-save handler by moving it to the store service, based on @habdelra's suggestion.
• Made cardResource in the playground panel an auto-saving card.

[github-actions]

Host Test Results

    1 files  ±0      1 suites  ±0   23m 16s ⏱️ +35s
771 tests +2  769 ✔️ +2  2 💤 ±0  0 ❌ ±0 
776 runs  +2  774 ✔️ +2  2 💤 ±0  0 ❌ ±0 

Results for commit 1973853. ± Comparison against base commit 22ebcca.

This pull request removes 1 and adds 3 tests. Note that renamed tests count towards both.

Chrome 133.0 ‑ Acceptance | AI Assistant tests: can display and remove auto attached card

Chrome 133.0 ‑ Acceptance | AI Assistant tests: can display and remove auto attached file
Chrome 133.0 ‑ Acceptance | code-submode | playground panel: trigger auto saved in edit format
Chrome 133.0 ‑ Integration | realm indexing and querying: absolute urls will be serialised into relative into relative code-ref fields

♻️ This comment has been updated with latest results.

[habdelra]

no need to cache this--it's actually cached in the loader, you can just get it each time that you need it.

[FadhlanR]

It's cached so that it can be reused in the unloadResource function. Otherwise, unloadResource would have to be an async function, but we need it to be synchronous for use in registerDestructor. Do you have any other idea how to get cardAPI in unreloadResource?

[habdelra]

ah! I see! make sense let's leave it as is

[habdelra]

this looks really good! exactly like we discussed

[tintinthong]

I have tested this and I dont see any degression in auto save. LGTM