GridStatePriority

Conflict-resolution strategy between the two external state sources — the URL (enableUrlSync) and localStorage (enablePersistence) — for the four *contested* state slices. See CONTESTED_SLICES.

The strategy is per-slice, not per-source-block: each contested slice is resolved independently, so a URL that carries sorting but not columnFilters lets localStorage supply the filters while the URL still wins the sort. This per-slice independence is the core of the design; a per-source-block merge cannot express it.

• url-first (default) — URL wins when it carries the slice, else localStorage fills, else the feature default. URL is explicit intent (bookmark, shared link); localStorage is implicit memory.
• localstorage-first — localStorage wins when present, else URL fills, else the feature default.
• url-only — contested slices come from the URL only; localStorage is ignored for them. Note this does NOT disable persistence for the column-shape slices (visibility/order/sizing/pinning) — those live only in localStorage and are unaffected by the strategy.
• localstorage-only — contested slices come from localStorage only; the URL is ignored for them.