Clicking an entrée's "N sorties liées" badge drills down to just that
entrée + its linked sorties (filterEntreeId) -- but the footer kept
showing the current year's totals throughout, which answers a
different question than the one this view exists for ("does this
entrée balance against what was paid out").
drilldownTotals() computes the same shape locally (montant_ht/ttc,
écart, par_compte) from the already-loaded drill-down rows -- no
server round-trip needed, unlike the per-year figures. footerTotals()
picks between it and currentYearTotals depending on whether
filterEntreeId is set, so the footer swaps automatically and reverts
the moment the drill-down is cleared.
Verified: montant_ht and every compte column match the drill-down's
two rows summed by hand exactly (to the cent), and closing the
drill-down correctly restores the normal per-year footer.
bachir
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