Studio leaks cross-field facts into the vote list (field isolation)

[febuz]

Bug (owner-reported): in the Studio, selecting intelfield or ledgerfield still shows FinField facts to vote on — e.g. AAPL US · us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax and AAPL US · us-gaap:Assets. Facts from one field must be hidden in another field's feed — at ChemField you don't expect FinField or LedgerField facts either. The field tag must actually filter, not just decorate.

Root cause (web/studio/fin-engine.js): wireStudio() seeds #verify-list with all seeded facts + all terms across every field (seedFacts/seedTerms) and appends every row unconditionally. setField() only toggles the button .on state and the #propose-section visibility — it never filters the verify list by currentField. So every field shows finfield's AAPL facts.

Fix (surgical):

1. In votableRow(...) tag the row: row.dataset.field = item.field;
2. In setField(field) add, after setting currentField:

   let shown = 0;
   for (const r of document.querySelectorAll('#verify-list .vrow')) {
     const on = r.dataset.field === field; r.hidden = !on; shown += on;
   }
   document.getElementById('verify-empty')?.remove();
   if (!shown) .insertAdjacentHTML('beforeend',
     '<p id="verify-empty" class="dim">nothing to verify in '+field+' yet — knit a term above.</p>');

3. prependVotable already uses currentField for new items — good; ensure a newly-knitted item in a non-active field is hidden too (it won't be, since you only knit into the active field).

Deeper (durable): consider a field_of(record) helper (kind→field: finfact-record/finfield-* → finfield) in finknit so every consumer — studio, feed readers, the 3D graph — filters by field the same way. Each field is its own domain knitweb; a fact woven into finfield should never appear in another field's web.

Verified against the deployed studio at https://finfield.github.io/web/studio/ and the source on the fin-studio branch.

🤖 Generated with Claude Code