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Viktor Barzin
9cc781a8d6 fire-planner: ProjectionLab parity Wave 1 — tabbed shell, year stats, goals,
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income streams, Sankey cashflow, progress overlay, settings sub-pages

Wave 1 (9 features across 4 streams):

Stream A — dashboard skeleton
  1.A.1 ScenarioShell with top tabs (Plan/Cash Flow/Tax Analytics/Compare/
        Reports/Estate/Settings) + left Sidebar with Plans switcher.
  1.A.2 GET /scenarios/{id}/year-stats?year=N returning per-year metrics
        (NW, Δ NW, taxable income, taxes, eff. rate, spending, contribs,
        investment growth). YearScrubber + YearStatsPanel render the
        right-hand sidebar; URL ?year= preserves selection.
  1.A.3 FanChart gains optional `milestones` prop (lib/milestone.ts maps
        life_event.kind → emoji) + selectedYear marker line.

Stream B — goals + progress
  1.B.1 New goals_eval module: target_nw_by_year / never_run_out /
        target_real_income probability evaluation. Wired into POST
        /simulate (exact, per-path) and GET /scenarios/{id}/projection
        (approximated from persisted fan via percentile interpolation).
        GoalsSection renders pass/fail badges.
  1.B.2 GET /scenarios/{id}/progress overlays AccountSnapshot totals on
        the projection fan; ProgressPage shows variance side-panel.

Stream C — income + cashflow
  1.C.1 New IncomeStream model + alembic 0003 + CRUD endpoints. Engine
        aggregates streams into per-year inflows + taxable arrays;
        income tax routes through the jurisdiction tax engine.
        IncomeStreamsSection on Plan tab.
  1.C.2 GET /scenarios/{id}/cashflow?year=N returns sources/sinks for
        an ECharts Sankey (sums conserve). CashflowTab body.

Stream D — settings
  1.D.1 SettingsTab + sub-nav (Milestones/Rates/Dividends/Bonds/Tax/
        Metrics/Other/Notes); placeholder cards for unbuilt sub-pages.
  1.D.2 LifeEventsSection relocated to /scenarios/:id/settings.
  1.D.3 RatesSettings (Fixed/Historical/Advanced segmented + per-asset
        cards). SimulateRequest gains rates_mode, inflation_pct,
        stocks/bonds growth + dividend, stocks_allocation. New
        build_fixed_paths() in simulator. Real-return arithmetic
        verified against (1+g+d)/(1+i)−1 ≈ 5.4%.
  1.D.4 NotesSettings — markdown textarea, save-on-blur, stored in
        scenario.config_json.notes.

Backend: 238 pytest pass (+19 new), mypy + ruff clean.
Frontend: typecheck + 7 unit tests + production build clean.

Roadmap for Wave 2-N is documented in the implementation plan.
 2026-05-10 12:49:44 +00:00
Viktor Barzin
e12e8f9290 whatif: live data refresh, inflation-adjusted spending, legend fix
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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>
 2026-05-10 11:27:22 +00:00
Viktor Barzin
bb74bc0add frontend: What-If page with fan chart driven by /simulate
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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>
 2026-05-09 22:08:00 +00:00