[ako]

Syncs ako/mxcli:main into upstream: 12 commits from fork PRs ako#1569 (which carries ako#1548), ako#1613 and ako#1611.

Fixes #1598: cases 1–5 landed in the previous sync, and this adds case 6. Refs #1453 (most of the proposal) and #1611 (part A).

Microflow splices keep what the script places (#1598 case 6)

• create or modify no longer moves a node the script places (mdl 1). Inserting statements without @position used to make room by shifting everything past the gap.
  • In the reported case, if $Flag went from -299 to 40, its merge from 186 to 525 and the return from 530 to 869. The calls in its branch stayed at their stated positions, left of their own decision, so a re-run was refused.
  • A stated position is now kept, and a shift that would have to pass one is refused. The refusal is listed among mdl 1's splice refusals.
• A restated if outweighs a new one whose condition differs. Pairing used to tie "the same if but for its condition" with "the same if with a branch edit", and broke the tie toward the earlier pair.
• A splice making room leaves the flow's parameters where they are. One inserted if/else moved $Flag from (200, 53) to (539, 53), and describe then printed a parameter @position no script had stated.

ALTER PAGE: object-list items (#1453)

• New: address a pluggable widget's object-list items, such as Accordion groups. This extends the navigation-list item address with a .slot suffix:

  insert into acc1 item@2 { … }                   -- the group's body slot
  insert into acc1 item('One') { … }              -- by its text
  insert into acc1 item(btnIn) { … }              -- the group holding a widget
  insert into acc1 item@1.headercontent { … }     -- another slot
  replace acc1 item@1.content with { … }
  drop acc1 item@1.headercontent
  drop acc1 item@2
  set (headerRenderMode: 'custom') on acc1 item@1

  An Accordion group stores no Name, so insert into grp1 { … } never resolved, and an empty group could not be filled at all.
• An item's hidden slots and texts are kept as CREATE stores them. Measured with docker check --no-update-widgets, because the default check normalises widgets first and hid all of these:
  • Inserting into a slot the item's mode hides is refused at check and exec. It used to give CE0463.
  • Switching to custom nulls the hidden header template. Before, the template stayed filled and gave CE0463.
  • Switching back to text is refused unless the statement also sets headerText, in which case the template is created.
• Shared rule: the body-slot rule moves to mdl/types.BodyItemSlotKey, which CREATE, describe and ALTER now share. This is a refactor and is its own commit.
• Docs: the alter-page reference and skill, a regression script, a finding, and the proposal status set to partial.

check: view entity associations (#1611, part A)

• New MDL-ASSOCDS02 refuses a page that follows a view entity's association from its target.
  • That path passed check --references and exec, then failed mx check with CE8812 "Entity 'M.Owner' has no association 'M.Stats_Owner'".
  • It was measured on 11.14 across list view, data grid, gallery and data view, and second in a path. Controls (view side, constrained query, persistent association reversed, microflow retrieve) give 0 errors.
• A view entity created in the same script now registers its associations, so the working form DATABASE M.Stats WHERE [M.Stats_Owner = $currentObject] is no longer falsely refused.
• Part B, the drop-down filter's defaultValue, is a separate PR.

Validation

• make build, make test, make lint, make check-mdl and make check-findings pass.
• Each fix has a control: the test fails with the reported symptom when the fix is reverted