Review pass over the preceding commits.
- The activity export paged by OFFSET. The journals are append-only and the
feed is newest-first, so rows written mid-export shift the window down and
repeat rows already emitted. Pages by keyset on (created_at, feed, id) now.
- top_token_users and the per-user breakdown counted run-level rollup rows.
A scheduled run already has a row per LLM call, so its spend was billed
twice -- invisible while the column was tokens, obvious once it was dollars.
Both now exclude them, matching every other spend query.
- total_cost was summed from the per-model split, which drops rows with no
model_id and so undercounted the figure printed above the series. Summed
from the series instead.
- The CSV export encoded its detail cell without the fallback the NDJSON
branch had, so a non-JSON-native value would have failed the stream.
- The activity view reset pagination in an effect, which fetched the stale
page against the new filters before fetching again. Reset in the setters.
- The audit taxonomy is no longer re-exported from the helper module; the one
caller that wanted it imports from where it lives.