Implements the committed projections design (docs/plans/2026-05-28-wealth-
projections-{design,plan}.md): a collapsed "Projections" row on the wealth
dashboard with 5 template vars (rate_low/base/high, monthly_contribution=auto,
horizon_years=30), a multi-scenario projection panel (Low/Base/High + trailing-
3y historical line + a base-rate compounding-only line), 3 stat cards, and a
text panel with one-click future time-range links.
Projection is pure SQL over dav_corrected: compound + ordinary-annuity FV from
today's net worth; auto contribution = trailing-12mo run-rate (COALESCE/NULLIF
so $monthly_contribution=auto doesn't constant-fold 'auto'::numeric). Historical
rate = trailing-3-full-year geometric mean of per-year Modified-Dietz returns
(~10.4%) — all-time was a nonsense 83% because the all-accounts-complete window
is only ~4 months, and the true all-time geomean is skewed by 2021's +86%.
Also aligns "Net pay vs market gain — per month" to consecutive month-end
deltas (same fix as the other monthly panels). Verified all SQL live.
[ci skip]
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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