[ako]

Syncs ako/mxcli:main into upstream: 14 commits from fork PR ako#1682.

It fixes six describe → exec losses found by round-tripping three real apps on v0.28.0. These are fork-filed issues with no upstream counterpart. Two of the 14 commits are a gofmt and its revert, which net to nothing.

describe → exec losses

• A read-only data view stays read-only. The writer took a data view's Editability from DataView.ReadOnly, which nothing sets, and describe read no key, so Editable: Never became Always on a round trip.
  • alter page … set (Editable: …) on a data view now writes the value too.
  • In the running app (run --local plus a Playwright check), the text box is disabled after the fixed round trip and editable before the fix.
• New: a native dynamic text's NativeTextStyle, one of Text or Heading1 to Heading6.
  • It is described, written by both backends (the MCP one hard-coded Text), accepted by alter page … set, and known to check.
  • A heading no longer comes back as text.
• New: page-level design properties. The page header takes DesignProperties: ( … ), typed against the theme's Document and Page groups.
  • describe prints them, and alter page … set ('Key': value) at page level writes them. check -p validates them.
  • Before, a round trip emptied the list.
• A native page's design properties are typed against the native theme. The theme registry read only web/design-properties.json, so a native option such as 'Color': 'Brand primary' came back as a custom value. It now loads the native files too, and each document picks its platform from its layout, type or stored Type.
• New: an import mapping call's input object and commit mode can be written:

  import from mapping M.IMM($Json) (Parameter: $Obj, Commit: Yes | YesWithoutEvents | No)

  • It is written, read and described.
  • exec refuses a missing parameter on a mapping that declares one (CE0244) and an unexpected one (CE0246).
  • This was measured with mxbuild by editing one property at a time. No fixture holds an import call with a parameter, so this is the shape mxbuild accepts.
• A Data grid 2 column's association-path template parameter. This was already fixed after v0.28.0 by the change for Pluggable widget text-template parameter cannot cross an association: mxcli writes Attribute, never EntityRef/Steps → CE1365 #1494. This adds the regression test for the column case.
• A splice refusal names the statement as written.

Validation

• Controls: each fix has a failing-first test at the layer the symptom lives in, a control (with the fix reverted, the test fails with the reported symptom), a bug-test script and a finding.
• End-to-end: on a blank Mendix 11.13.0 app, the fixed round trip reports "Unchanged page" and mx check gives 0 errors.
• Allowlist: two TestApp documents now round-trip and are struck from the allowlist.
• Follow-ups: an upgrade-test fold for the new spelling, a test-helper rename that fixed go vet -tags integration, and two regenerated skill indexes.
• Checks: make build, make test, make lint and make check-mdl pass.
• Not run in Studio Pro.

Not covered

• list design properties for <type> and the LSP's design-property diagnostics still read the web definitions only.
• The MCP backend writes no page-level appearance, so page design properties don't reach a live Studio Pro.
• MDL-WIDGET15 (adjacent inline dynamic texts) also fires on native pages, where it may not apply