#111 (part 2): on installs with Elementor's Flexbox Container experiment OFF, the
'container' element type is unregistered, so add-container/build-page stored pages
that render empty (Elements_Manager skips the uninstantiable element). Add
EMCP_Tools_Atomic_Props::is_container_supported() (authoritative element-type check),
refuse add-container/build-page up front with an actionable container_unsupported
error, and surface supports_container + a warning + recommended_mode='unsupported'
from detect-elementor-version.
#112: Document::save() THROWS Elementor's atomic settings/styles validation on an
editor-authored {$$type:'dynamic'} paragraph whose tag the CLI/REST atomic
dynamic-tags registry can't resolve, and because save() validates the whole tree it
blocked EVERY edit to the document. Route a validation-rejection throw into the
existing raw meta-write fallback (the tree is already coerce_tree'd, so what remains
is data the editor itself persists) via EMCP_Tools_Data::is_atomic_validation_rejection();
genuine fatals still hard-fail.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
