useLegendMapBridge took the idle paint helper as an injected dependency and
called it five times, while each consuming map defined its own copy of the
one-line body and handed it over. The library owned the paint logic and not the
expression it painted with, so the copies could drift apart silently and the
two maps would render the same idle state differently.
Export it from the composable instead, and take it from there in this map. The
injected parameter is deliberately KEPT for one round: inside the composable
the parameter shadows the module export, so what the bridge paints with is
still exactly what its callers pass, and this change cannot move behaviour. It
is a deletion in the plugin and an addition in the library, nothing more. The
parameter goes when the second map has adopted the export too.
This map held a THIRD copy under a different name -- a function-scoped helper
in the paint prewarm, byte-identical body, used once. It now refers to the
library helper.
Verified rather than assumed: the library version and both original plugin
versions produce identical output for every value the maps actually pass,
including the dynamic one. check:region-paint-single-source is green for this
map and stays red for the other until it adopts the export, which is the state
the gate is meant to report.
The second map is the other plugin's file and is not touched here; its owner
takes that half.
1fde4b9cc4