EthanHealy01 bda9cebc5c Portal ProcessorFlow: proportional particle emission + Storybook playground (#7105)
## Summary
Follow-up polish to the home **PDF Processor** flow visualiser (base
landed in #7014). Tunes the particle animation to react to real volume
and adds a Storybook playground to tune it live.

## Changes
### Particle emission — `useFlowParticles.ts`, `flowTypes.ts`
- Emission rate now scales ~linearly with a source's 24h volume (**2×
volume ≈ 2× dots**) instead of the flat `rate / 86400 × SPEED`, capped
at **one dot / 250ms** (`MAX_EMIT_PER_SEC`) for busy sources (~≥
800/24h).
- Bounded the spread so the busiest source emits at most **5×** the
quietest (`EMIT_SPREAD_CAP`) — a dominant source can't starve the
others.
- Wider departure jitter (`[0.4×–1.7×]` the mean, still floored at the
per-source min-gap) and ~**2× faster travel** so the flow reads
livelier.
- Replaced the single `SPEED` constant with `EMIT_DIVISOR` /
`MAX_EMIT_PER_SEC` / `EMIT_SPREAD_CAP`. Weighted round-robin outcome
split is unchanged (e.g. 3 failed / 30 delivered → ~1 red dot in 11).

### Storybook Playground — `ProcessorFlow.stories.tsx`,
`ProcessorFlow.tsx`
- New **Playground** story with live controls: per-input rate sliders,
the delivered/failed split (drives the red-dot ratio), and a
Classification-active toggle.
- Added an optional `dataOverride` prop (prod-inert testing seam) so the
story renders a supplied flow model instead of fetching — changes apply
instantly.

### Housekeeping
- Condensed authored comments across the feature to ≤ 2 lines.

## Testing
- `task frontend:check` green — lint, typecheck, 1353 tests.
- Verified emission numerically (proportionality, 250ms ceiling, 5×
spread cap) and confirmed live animation in a focused Storybook tab.
2026-07-20 15:29:46 +00:00
2026-07-11 12:48:53 +01:00
2026-03-25 11:00:40 +00:00
2026-07-17 10:16:06 +00:00
2026-03-25 11:00:40 +00:00

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