Function decodeFieldFilter

decodeFieldFilter(
descriptor: { id: string; kind: string },
entries: Readonly<Record<string, string>>,
): PermalinkFilterField | null
A descriptor's selection, read back from the per-field entries of a link.
Parameters
- descriptor: { id: string; kind: string }
  The filter field the entries are read for: its id names the entry, its kind says how to read it.
- entries: Readonly<Record<string, string>>
  The per-field entries (PermalinkState.fieldFilters).
Returns PermalinkFilterField | null
The serialised field to hand to GeoLeaf.Filter.applyFilter(), or null when the link carries nothing usable for that field.
Example
```
decodeFieldFilter({ id: "altitude", kind: "range" }, { altitude: "100.." });
// → { id: "altitude", kind: "range", range: { min: 100 } }
```
- Defined in packages/core/src/capabilities/permalink/permalink-field-filters.ts:207