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/eslint.config.js

@@ -221,6 +221,18 @@ export default tseslint.config(
         // The canonical "FE control" row (CLAUDE.md): a short fixed set is a SegmentedToggle, a
         // longer one or a user's own list a FilterSelect. Six native selects had drifted in; the
         // 2026-09 debt burn replaced them, and this keeps the next one out.
+        // `enabled:` sees only the native attribute; a FocusSafeButton that holds the focus is
+        // disabled by aria-disabled, so a bare `enabled:hover:` lit it up on hover as if it worked.
+        {
+          selector: "Literal[value=/(^|\\s)enabled:hover:/]",
+          message:
+            "`enabled:hover:` misses a focused FocusSafeButton (aria-disabled): use `enabled:not-aria-disabled:hover:`.",
+        },
+        {
+          selector: "TemplateElement[value.raw=/(^|\\s)enabled:hover:/]",
+          message:
+            "`enabled:hover:` misses a focused FocusSafeButton (aria-disabled): use `enabled:not-aria-disabled:hover:`.",
+        },
         {
           selector: "JSXOpeningElement[name.name='select']",
           message:

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")}

frontend/src/components/PlaylistLimitsHint.tsx

@@ -21,7 +21,12 @@ export default function PlaylistLimitsHint() {
     offset: 8,
   });
   return (
-    <div className="mt-2 flex items-center gap-1.5 border-t border-border/60 px-1 pt-2 text-2xs text-muted">
+    // The panel is placed off the whole row, not the "Why?" button: off the button it opened
+    // over the right third of the rail and covered the lists (measured on localdev).
+    <div
+      ref={pop.refs.setPositionReference}
+      className="mt-2 flex items-center gap-1.5 border-t border-border/60 px-1 pt-2 text-2xs text-muted"
+    >
       <Info className="h-3.5 w-3.5 shrink-0" aria-hidden="true" />
       <span>{t("playlists.limits.hint")}</span>
       <button

frontend/src/components/playerModalControls.tsx

@@ -36,8 +36,8 @@ export function PlayerTransportControls({
   const { t } = useTranslation();
   const docked = variant === "docked";
   const navBtn = docked
-    ? "inline-flex items-center gap-1 text-white/80 enabled:hover:text-white disabled:opacity-30 transition"
+    ? "inline-flex items-center gap-1 text-white/80 enabled:not-aria-disabled:hover:text-white disabled:opacity-30 transition"
-    : "inline-flex items-center gap-1.5 text-muted enabled:hover:text-fg disabled:opacity-40 transition";
+    : "inline-flex items-center gap-1.5 text-muted enabled:not-aria-disabled:hover:text-fg disabled:opacity-40 transition";
   const navLabel = docked ? "hidden sm:inline" : "";
   const counter = docked ? "tabular-nums text-white/70" : "text-muted tabular-nums";
   const divider = docked ? "h-4 w-px bg-white/20" : "w-px h-4 bg-border";

frontend/src/components/ui/UndoToolbar.tsx

@@ -45,7 +45,7 @@ export default function UndoToolbar({
   }, [canUndo, canRedo, onUndo, onRedo]);
 
   const btn =
-    "p-1.5 rounded-lg border border-border text-muted enabled:hover:text-fg enabled:hover:border-accent disabled:opacity-30 transition";
+    "p-1.5 rounded-lg border border-border text-muted enabled:not-aria-disabled:hover:text-fg enabled:not-aria-disabled:hover:border-accent disabled:opacity-30 transition";
   return (
     <div className="inline-flex items-center gap-1">
       <FocusSafeButton

frontend/src/lib/controlRules.contract.test.ts

@@ -3,9 +3,9 @@ import { fileURLToPath } from "node:url";
 import { ESLint } from "eslint";
 import { describe, expect, it } from "vitest";
 
-// The canonical "FE control" row (CLAUDE.md) as a lint rule: no native <select>. Six had drifted in
+// Two lint rules about controls: no native <select> (the canonical "FE control" row in CLAUDE.md;
-// before the rule existed. A selector that matches nothing looks exactly like a clean codebase, so
+// six had drifted in before the rule existed), and no hover gated on `enabled:` alone. A selector
-// this pins that it fires.
+// that matches nothing looks exactly like a clean codebase, so this pins that each fires.
 const FRONTEND = fileURLToPath(new URL("../../", import.meta.url));
 
 async function refused(source: string): Promise<number> {
@@ -20,3 +20,23 @@ describe("a native select", () => {
     expect(await refused("export const B = () => <SegmentedToggle />;\n")).toBe(0);
   });
 });
+
+// `enabled:hover:` is blind to a focused FocusSafeButton (aria-disabled, not the native attribute),
+// which then lit up on hover as if a click would work.
+describe("a hover gated on `enabled:` alone", () => {
+  it("is refused; the aria-aware gate is not", async () => {
+    const eslint = new ESLint({ cwd: FRONTEND });
+    const lint = async (cls: string) =>
+      (
+        await eslint.lintText(
+          `export const c = "p-1 ${cls}:text-fg";
+`,
+          {
+            filePath: "src/components/__probe.tsx",
+          },
+        )
+      )[0]?.messages.filter((m) => m.message.startsWith("`enabled:hover:`")).length;
+    expect(await lint("enabled:hover")).toBe(1);
+    expect(await lint("enabled:not-aria-disabled:hover")).toBe(0);
+  });
+});