Panel 7 (YTD uses): replace the single `ytd_income_tax` stack segment
with two — `ytd_cash_income_tax` (full red, same color as before) and
`ytd_rsu_income_tax` (desaturated orange) — computed from the new
`cash_income_tax` column on payslip. RSU-vest months now visually
separate the cash tax from the PAYE attributable to the grossed-up
RSU, matching user mental model of "what I actually paid in cash tax".
Panel 8 (Sankey): split the single `Gross → Income Tax` edge into two
edges (`Gross → Income Tax (cash)` and `Gross → Income Tax (RSU)`)
sourcing the same two figures.
Panel 3 (effective rate): left untouched — it's the "all-in" rate and
keeps using raw `income_tax`.
Panel 9 (P60 reconciliation — new): per-tax-year table comparing HMRC
P60 annual figures against SUM(payslip) via LATERAL JOIN on
payslip_ingest.p60_reference. Threshold-coloured delta columns (|Δ|<1
green, 1-50 yellow, >50 red) surface missing months or parser drift.
Panel 10 (HMRC Tax Year Reconciliation — new): placeholder for the
hmrc-sync service (code scaffolded, awaiting HMRC prod approval to
activate). Queries `hmrc_sync.tax_year_snapshot`; renders empty until
that schema lands. Delta > £10 → red.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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