A native <select multiple> can't collapse to a single-line trigger and
open as an overlay on hover -- it's either an always-open multi-row
list box or a single-value dropdown, not both. Replaced with a custom
dropdown: a trigger showing the current selection ("Tous" / "Maud,
Ouidade"), and a checkbox list shown on hover via a plain CSS :hover
rule (no open/close state needed). Checkboxes instead of ctrl/shift+click,
but same result -- several comptes/types at once -- with a more
discoverable interaction (no keyboard modifier to know about).
Also added a "✕ Effacer ce filtre" button next to Compte/Client/Type/
Année, shown only once that filter is active. Directly addresses the
Client filter specifically being painful to clear (select the text,
delete, press enter) -- one click now.
bachir
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