Converts a form-produced POI into a GeoJSON Point Feature suitable for
GeoLeaf.Layers.addFeature / mergeFeatures on the host layer.
Requires an id (promoteId / feature-state prerequisite); the add-form path
always assigns one (user-poi-<ts>). Returns null when id is missing or
no geometry/coordinates can be resolved.
Converts a form-produced POI into a GeoJSON Point Feature suitable for
GeoLeaf.Layers.addFeature/mergeFeatureson the host layer.Requires an
id(promoteId / feature-state prerequisite); the add-form path always assigns one (user-poi-<ts>). Returnsnullwhenidis missing or no geometry/coordinates can be resolved.