## What
Two related changes to the AI auto-categorization feature.
### 1. Open the gate to pro + consent (drop the new-signups-only cohort)
Eligibility for AI auto-categorization was: kill switch **+ pro plan +
active AI consent + a Pennant rollout flag** that only resolved for
users created after `ai_categorization.rollout_after`. That last cohort
gate limited the feature to a handful of recent signups (6 eligible
users in prod).
The gate is now just **kill switch + pro plan + active AI consent**, so
every consented pro user is eligible regardless of signup date.
- `allows()` and `allowsBackfill()` became identical and collapse into a
single `allows()`; `CategorizeBackfillCommand` calls it.
- The `AiCategorization` Pennant feature and the
`ai_categorization.rollout_after` config are now dead and removed. The
weekly cohort report already derives its release marker from the first
`ai_consents.accepted_at`, so nothing depends on the config.
> Note: the `AI_CATEGORIZATION_ROLLOUT_AFTER` env var must be removed
from the production environment — it is no longer read.
### 2. Nudge free users that AI could categorize their transactions
Free-plan users now see a subtle AI sparkle on uncategorized rows,
reusing the trailing icon slot already in `CategoryCell` (no layout
change). It only shows when subscriptions are enforced and the user is
not pro; clicking it routes to `/settings/billing`.
To keep it subtle, the sparkle is sampled to a share of rows via a
deterministic function of the transaction id (its last byte mapped onto
a 0-100 threshold), so the same rows decide the same way across reloads
instead of flickering or marking every row.
The share is **configurable** via `ai_categorization.upsell_sample_rate`
(env `AI_CATEGORIZATION_UPSELL_SAMPLE_RATE`, default 40), exposed to the
frontend as the `aiCategorizationUpsellRate` Inertia prop — no rebuild
needed to retune it.
## Tests
- PHP: `AiCategorizationGateTest` updated (rollout case dropped);
job/listener tests no longer activate the removed feature.
- JS: `ai-upsell-sample.test.ts` covers determinism, the 0/100 bounds,
the threshold boundary, and the per-rate split.
- Manually verified in-app (Playwright): nudge renders for a free,
consented, bankless user; rate matches config.
## Follow-ups (not in this PR)
- Remove the `AI_CATEGORIZATION_ROLLOUT_AFTER` prod env var.
- Backfilling existing pro+consent users' history still requires running
`ai:categorize-backfill {user}`.
- The nudge only reaches free users who pass the paywall (no bank
connection + paywall already seen); free users with a bank connection
never reach `/transactions`. Consider surfacing it on the paywall too.
ae59c90f2c