"One filter system to maintain" now holds at the presentation layer
too: the field/op list the builder renders comes from
services.FilterFieldsPayload(scope) — the Go registry's wire face,
scope-filtered and group-ordered — rendered into the bookshelf mount
as a data attribute (templates.JSONArg), ingested once by the Alpine
component. The registry carries operator presentation (labels,
negation, arity) in FilterOpWire alongside the grammar; per-field
value-cell semantics (valueKind) derive from the existing Kind.
The hardcoded TS mirror (OPS, op(), F(), TEXT_OPS/NUM_OPS/DATE_OPS,
FIELD_GROUPS, its known drift surface) is deleted; filter_builder.ts
now ingests the wire (ingestFilterFields — malformed payloads leave
empty menus rather than client-invented rows), and the field menu's
episode fields are HIDDEN on the All-Books page for free (the books
scope payload excludes them — the plan's "hide podcasts from the
rules on the all books page" is now structural, not enforced by a
second hand-kept list).
Unit tests ingest a minimal wire fixture (the payload shape is the
contract, not the mirror); vitest 167 green, tsc + vp clean.
John O'Keefe
eb68672390