Three follow-ups to the actualbudget integration:
**Always-fresh autofill.** Drop the one-shot `*AutoFilled` boolean
gates; replace with `nwUserEdited` / `spendingUserEdited` flags. Until
the user types into either field, every refetch (mount, window
focus) updates the form value. Once they edit, we leave it alone. A
small ↻ button next to each anchor input flips the edited flag back
off so the user can re-snap to live data on demand. React Query
configured with staleTime=0 + refetchOnMount='always' +
refetchOnWindowFocus=true so the cache never serves stale numbers.
NW provenance shows the snapshot date.
**Inflation-adjusted spending.** Backend now revalues each trailing
month's nominal pence forward to today's £ using monthly compounding
of `inflation_pct` (default 0.03 ≈ UK CPI 2024-26). Headline
`total_gbp` is the real-£ figure — matches the simulator's
real-GBP convention. Response also includes `nominal_total_gbp` and
`inflation_pct` for transparency. New /spending/annual?inflation_pct=
override param. 10/10 actualbudget tests pass.
**FanChart legend.** The bottom-anchored legend was overlapping the
x-axis label. Moved to top: 8 with itemGap=18 + type=scroll for
narrow viewports; bumped grid top→48 / bottom→56 + xAxis nameGap→28
so nothing collides.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
New /what-if route. Sticky form on the left (jurisdiction, strategy,
glide, NW seed, spending, savings, horizon, optional floor for
vpw_floor, MC paths) submits to POST /simulate; results panel renders
summary stats + the new FanChart.
FanChart component layers seven series:
- p10 invisible baseline (line, transparent)
- p10→p25 stacked area (low opacity)
- p25→p75 stacked area (IQR, mid opacity)
- p75→p90 stacked area (low opacity)
- p50 solid median line (drawn last, prominent)
- p10 + p90 dashed lines on top of the bands
Stacking deltas keeps the band fills clean — plotting raw quantiles
each as their own area would overlap badly. Reusable by scenario
detail in the next chunk (same ProjectionPoint[] shape).
5 tests pass (was 2). 470 KB gzipped (ECharts).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
