fields.blocks: clicking a row no longer opens the edit dialog in 0.6.5 (works in 0.6.4)

In @keystatic/core 0.6.5, clicking a row in a fields.blocks list no longer opens the edit dialog. Nothing happens — no dialog, no console error. The same schema works on 0.6.4.

The practical effect is that existing blocks cannot be edited at all. You can still add, delete and reorder them, so the admin looks healthy until you try to change something.

Reproduction

A singleton with a single fields.blocks, two trivial variants, no itemLabel:

proef: singleton({
  label: 'Proef',
  path: 'src/content/proef',
  format: { data: 'yaml' },
  schema: {
    blocks: fields.blocks(
      {
        first: { label: 'First kind', schema: fields.object({ name: fields.text({ label: 'Name' }) }) },
        second: { label: 'Second kind', schema: fields.object({ name: fields.text({ label: 'Name' }) }) },
      },
      { label: 'Blocks' },
    ),
  },
}),

With two existing items in src/content/proef.yaml:

blocks:
  - discriminant: first
    value:
      name: Block one
  - discriminant: second
    value:
      name: Block two

Click either row in the admin.

• 0.6.4 — an "Edit First kind" dialog opens with the field in it.
• 0.6.5 — nothing happens. No dialog is added to the DOM, and the console stays empty.

Tried click, double click, and Enter on the focused row. Local storage mode, no custom UI.

Not the schema

A plain fields.array opens on both versions. I tested four shapes side by side in one singleton:

One other visible difference on 0.6.5: a fields.array renders a localized "Add" button (I run locale: 'nl-NL', so it reads "Toevoegen"), while a fields.blocks renders an untranslated "Add". That also holds on 0.6.4, so it is probably a separate thing, but it suggests the two use different components.

Versions

• Broken: @keystatic/core 0.6.5 with @keystatic/astro 5.2.0
• Working: @keystatic/core 0.6.4 with @keystatic/astro 5.1.0
• Astro 6.4.8, React 19.2.0, local storage mode
• @keystar/ui goes 0.9.2 → 0.9.3 between the two. react-aria is 3.50.0 in both, so it does not look like the react-aria interaction issue in #1529.

Single copy of @keystatic/core in the tree in both cases (checked with npm ls).

Start at the @keystatic/core fields.blocks implementation and compare the 0.6.4 and 0.6.5 behavior using the provided singleton reproduction. Verify the existing block rows in the admin and trace their click, double-click, and Enter interactions. Done means clicking a row opens its edit dialog in 0.6.5 without console errors, while add, delete, and reorder still work.