New /dashboard/compte page, one compte associé (freelance) at a time via
a selector. Focused on entree/versement only (not achat/hébergement/
sous-traitant): reuses the same entrée<->versement reconciliation
algorithm as the /lignes badges (a versement can settle several entrées
at once, split equally), aggregated per compte to surface outstanding
"reste à verser", over-paid entrées, and versements with no linked
entrée at all -- plus solde/entrées-vs-versements/top-clients charts for
context.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
