fix(popover): R10 weak-ring — checked rows get the full highlight fill

A hovered/roving CHECKED row got only a thin ring (R9 split), reading as a weak
afterthought next to an unchecked row's vivid accent fill. Now selected rows get the
SAME bg-accent/35 fill + a STRONGER ring (ring-2 accent/80 vs the unselected ring-1
accent/60); the child checkmark/checkbox stays legible on the tint. The one idiom that
DID rely on the R9 ring-only — the table-filter options, whose selected item paints its
own solid bg-accent ROW — opts back in via a new `keepSelectedPaint` PopoverItem prop,
so its solid paint isn't downgraded to a 35% tint. Scopes the R9 exception to the one
menu that needs it instead of penalising every checkbox menu.

frontend/src/components/AnchoredPopover.tsx

@@ -250,15 +250,20 @@ type ItemRole = "menuitem" | "menuitemradio" | "menuitemcheckbox" | "option";
  *  focus-visible heuristic, so a `:focus-visible` highlight can stay invisible until the first arrow
  *  key. (Since the Tailwind v4 migration `bg-accent/NN` works — v4 does the opacity modifier via
  *  color-mix — so the recipe no longer needs a hand-written color-mix arbitrary value.) */
-// The roving-focus highlight, SPLIT by selection state (R9). A NON-selected row gets the familiar
-// accent fill + inset ring. A SELECTED/checked row gets ring-ONLY, so the consumer's own resting
-// selected paint (a bg-accent fill, text-accent, a checkbox) SURVIVES being highlighted instead of
-// being downgraded to a 35% tint or having its text recoloured (the R10-S0 review findings). The two
-// can't be merged onto one recipe: the fill and the selected paint both drive background/color on the
-// same element, so the highlight must yield to the selected state rather than overwrite it.
+// The roving-focus highlight. A hovered/roving row gets the SAME strong accent fill whether or not it
+// is selected — a checked row no longer reads as a weak ring-only afterthought (R10 weak-ring fix). The
+// selected state stays legible ON the fill because these menus mark "selected" with a CHILD element (a
+// checkmark / checkbox) that paints over the row tint; the selected row just gets a stronger ring
+// (ring-2, accent/80) than an unselected one (ring-1, accent/60) to keep the two apart.
+// EXCEPTION: a menu whose SELECTED item paints its OWN row background (a solid bg-accent — the
+// table-filter options) passes `keepSelectedPaint`, so the highlight yields to ring-only there; a fill
+// would downgrade that solid paint to a 35% tint (the R9 concern, now scoped to just that idiom).
 const HIGHLIGHT_UNSELECTED =
   "data-active:bg-accent/35 data-active:text-fg data-active:ring-1 data-active:ring-inset data-active:ring-accent/60";
-const HIGHLIGHT_SELECTED = "data-active:ring-2 data-active:ring-inset data-active:ring-accent/70";
+const HIGHLIGHT_SELECTED =
+  "data-active:bg-accent/35 data-active:text-fg data-active:ring-2 data-active:ring-inset data-active:ring-accent/80";
+const HIGHLIGHT_SELECTED_RING_ONLY =
+  "data-active:ring-2 data-active:ring-inset data-active:ring-accent/70";
 
 export function PopoverItem({
   children,
@@ -266,6 +271,7 @@ export function PopoverItem({
   role = "menuitem",
   checked,
   selected,
+  keepSelectedPaint,
   disabled,
   className,
   /** Typeahead match string; defaults to the text child. Set explicitly when children aren't plain text. */
@@ -277,6 +283,9 @@ export function PopoverItem({
   role?: ItemRole;
   checked?: boolean;
   selected?: boolean;
+  /** Set when the SELECTED item paints its OWN row background (a solid bg-accent, not a child checkmark):
+   *  the active highlight then yields to ring-only so the fill doesn't downgrade that solid paint. */
+  keepSelectedPaint?: boolean;
   disabled?: boolean;
   className?: string;
   label?: string;
@@ -327,7 +336,13 @@ export function PopoverItem({
       tabIndex={focusActive ? 0 : -1}
       data-active={visualActive ? "true" : undefined}
       disabled={disabled}
-      className={`outline-hidden ${checked || selected ? HIGHLIGHT_SELECTED : HIGHLIGHT_UNSELECTED}${className ? ` ${className}` : ""}`}
+      className={`outline-hidden ${
+        checked || selected
+          ? keepSelectedPaint
+            ? HIGHLIGHT_SELECTED_RING_ONLY
+            : HIGHLIGHT_SELECTED
+          : HIGHLIGHT_UNSELECTED
+      }${className ? ` ${className}` : ""}`}
     >
       {children}
     </button>

frontend/src/components/tableHeader.tsx

@@ -156,6 +156,7 @@ function FilterFunnel<T>({
             <PopoverItem
               role="menuitemradio"
               checked={!filterOn}
+              keepSelectedPaint
               onSelect={() => onApply(col.key, "")}
               label={t("datatable.all")}
               className={`text-left text-xs px-2 py-1.5 rounded-md outline-hidden transition ${
@@ -169,6 +170,7 @@ function FilterFunnel<T>({
                 key={o.value}
                 role="menuitemradio"
                 checked={value === o.value}
+                keepSelectedPaint
                 onSelect={() => onApply(col.key, o.value)}
                 label={o.label}
                 className={`text-left text-xs px-2 py-1.5 rounded-md outline-hidden transition ${