fix(ui): a focused, disabled FocusSafeButton no longer lights up on hover

A FocusSafeButton that holds the focus is disabled by aria-disabled, not the native attribute, so
every hover gated on `:disabled` / `enabled:` alone still fired on it — the glass lift, the primary /
danger / warn dim, and eight `enabled:hover:` chains (saved views, the player's list buttons, the
undo toolbar). Measured on localdev: the Pager's Next, focused at the last page, now keeps its resting
border and shadow under the pointer. The CSS selectors and the chains also exclude
`[aria-disabled="true"]`, and a lint rule refuses a bare `enabled:hover:` from now on.

frontend/src/components/PersonalViewsModal.tsx

@@ -240,7 +240,7 @@ export default function PersonalViewsModal() {
                 disabled={!nameChanged}
                 title={t("views.rename")}
                 aria-label={t("views.rename")}
-                className="inline-flex shrink-0 items-center rounded-lg border border-border p-2 text-muted transition enabled:hover:border-accent enabled:hover:text-accent disabled:opacity-30"
+                className="inline-flex shrink-0 items-center rounded-lg border border-border p-2 text-muted transition enabled:not-aria-disabled:hover:border-accent enabled:not-aria-disabled:hover:text-accent disabled:opacity-30"
               >
                 <Check className="h-4 w-4" />
               </FocusSafeButton>
@@ -302,7 +302,7 @@ export default function PersonalViewsModal() {
                 title={
                   saveCurrentDisabled ? t("views.saveCurrentUpToDate") : t("views.saveCurrentHint")
                 }
-                className="inline-flex items-center gap-1.5 rounded-lg border border-border px-3 py-1.5 text-sm text-muted transition enabled:hover:border-accent enabled:hover:text-accent disabled:opacity-40"
+                className="inline-flex items-center gap-1.5 rounded-lg border border-border px-3 py-1.5 text-sm text-muted transition enabled:not-aria-disabled:hover:border-accent enabled:not-aria-disabled:hover:text-accent disabled:opacity-40"
               >
                 <Save className="h-3.5 w-3.5" />
                 {t("views.saveCurrent")}