Swaps the unbounded vertical filter panel for a Polaris-style add-filter
builder (searchable grouped field picker, type-aware value control, applied
chips) and colour-codes the fees column with each member's period-scoped
unpaid-cycle count.
Push the boolean and date custom-field predicates and custom-field
sorting down to JSONB expressions so the overview stops classifying
custom-field values in memory. A GIN index on custom_field_values.value
keeps the boolean membership predicates index-served.
