Build every floorplan view with z2ui5_cl_ai_xml, add CI and an AGENTS.md

[oblomov-dev]

Part of a cross-repo pass on making the abap2UI5 ecosystem workable for AI agents. This repo had no CI, no tests and no documented way to verify anything — an agent (or a human) could not tell whether a change even compiles.

⚠️ Breaking for subclasses

All seven classes move off the frozen fluent builder z2ui5_cl_xml_view to the generic z2ui5_cl_ai_xml (open/leaf/a/shut/stringify). The render hooks that take a builder handle — io_page, io_table, io_columns, io_cells, io_op, io_actions, io_parent, io_container — are now typed TYPE REF TO z2ui5_cl_ai_xml. Parameter names and the set of hooks are unchanged, so a redefining subclass only has to switch to the four verbs. The README escape-hatch example shows the new form and the change is called out there.

The point is not style: the abap2UI5-linter only reconstructs ai_xml views, so until now nothing could check this repo's UI at all. It can now — the property gate plus a real headless XMLView.create over every view the floorplans build, including the parts built inside the render hooks.

Translation is 1:1: same controls, attributes, order, events and bindings. Details worth knowing:

• property names are the real UI5 camelCase ones the old builder mapped internally (showNavButton, growingThreshold, …)
• abap_bool expressions go through z2ui5_cl_ai_xml=>as_bool( )
• the obsolete _bind_edit( ) calls became _bind( )
• the root mvc:View keeps the displayBlock="true" height="100%" the old factory( ) stamped on it; the popup fragments keep their core:FragmentDefinition root
• sap.uxap.ObjectPageSubSection showTitle="false" is kept (it is @since 1.77), so the linter floor in abap2ui5lint.jsonc is 1.77 — the only post-1.71 member in the repo. The floor stays at the minimum on purpose: a floor above what the code uses stops the gate from reporting members missing on the systems users run.

Verification, where there was none

• .github/workflows/check.yml runs abaplint and the abap2UI5-linter on every push and PR.
• abaplint.jsonc's errorNamespace moves from . to ^Z: the wrapper deliberately reads CDS annotations through on-prem DDIC APIs (cl_dd_ddl_annotation_service, DDSTRUCOBJNAME) that the steampunk-2305 dependency does not ship, so every such reference was a false "not found" error (16 issues). With ^Z the own namespace stays fully checked and the repo lints clean at 0 issues.
• abap2ui5lint.jsonc pins the view-gate settings; .gitattributes pins LF after a CRLF import once broke the .asddls round-trip.

Current state: abaplint 0 issues (23 files), abap2UI5-linter 7 files 0 failing with the render gate on (2 accessibility hints, left as they were).

AGENTS.md

New: the verification commands, the on-prem target platform (with an explicit "do not modernize RTTI to XCO or swap the annotation API"), the PROTECTED escape-hatch methods as a public contract, abapGit conventions, and what the view gate can and cannot see here.

Two corrections while writing it: the README promised a core class z2ui5_cl_fp_list_report that was added upstream and removed again days later, and the README had no "Validate" section at all.

Best merged after abap2UI5-linter#6 — the CI job uses that action from main, and the reconstruction fixes there are what make these views checkable.

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