[aguingand]

Problem

After submitting a form, the edited instance should be highlighted in the list (focused and scrolled into view). It often wasn't:

• Full-page list: the row link was focused, but Inertia's Scroll.reset() (window.scrollTo(0, 0) after page swap) ran right after, so the row ended up off screen.
• Rows beyond the first rendered chunk (50) weren't in the DOM, so nothing was found.
• Wrong link: the [data-instance-row] a selector could match a link inside an HTML field rendered before the row overlay link.
• Show page with entity map (configureEntityMap): highlighted_entity_key is the item's entity (e.g. post-block-visuals) while Show.vue compared it to the field's entityListKey (post-block), so the highlight was never applied (and a collapsed list never expanded).

Fix

• focusHighlightedInstance(): renders enough rows to include the highlighted instance, waits two animation frames (after Inertia's scroll reset), then scrollIntoView({ block: 'center' }) the row and focuses its link with preventScroll.
• Row overlay link is targeted via a dedicated data-row-link attribute.
• Rows without a link are not focused / scrolled.
• Entity list form links (edit, and entity map create) get an entity_list_key query param (the key of the list they're opened from). FormController passes it to the form endpoint and uses it as highlighted_entity_key on redirect / cancel (falling back to the form entity base key). HandleInertiaRequests strips it from the browser URL. So the existing highlightedEntityKey === entityListKey check in Show.vue works with entity maps, including auto-expanding a collapsed list.

Tests

• Updated form URL expectations in EntityListControllerTest / ApiEntityListControllerTest; added a FormControllerTest case for entity_list_key (endpoint, cancel URL, update & store redirects).
• Checked manually on the demo with Playwright: posts list (last row, page scrolled + link focused; failed before the fix) and post Show page with the post blocks entity map in a collapsed section (list expands, row focused and in view; not at all before).

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