diff --git a/frontend/src/components/AboutCell.tsx b/frontend/src/components/AboutCell.tsx
index e2af1a75..9ddb995f 100644
--- a/frontend/src/components/AboutCell.tsx
+++ b/frontend/src/components/AboutCell.tsx
@@ -45,7 +45,7 @@ export default function AboutCell({ text, channelId }: { text: string | null; ch
         ref={pop.refs.setReference}
         {...pop.getReferenceProps()}
         tabIndex={0}
-        className="block max-w-88 truncate text-muted cursor-help outline-hidden"
+        className="block max-w-88 truncate text-muted cursor-help rounded-sm outline-hidden focus-visible:outline-2 focus-visible:outline-accent/60 focus-visible:outline-offset-2"
       >
         {preview}
       </span>
diff --git a/frontend/src/components/AnchoredPopover.tsx b/frontend/src/components/AnchoredPopover.tsx
index f807375d..f4c173fe 100644
--- a/frontend/src/components/AnchoredPopover.tsx
+++ b/frontend/src/components/AnchoredPopover.tsx
@@ -250,11 +250,15 @@ 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.) */
-// Applied to EVERY PopoverItem so the roving-focus row is clearly visible across all schemes: an
-// accent fill plus a 1px inset accent ring for a defined edge. (The previous per-consumer 24% fill
-// alone read as barely-there — a real UAT finding, 2026-08-08.)
-const ACTIVE_HIGHLIGHT =
+// 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.
+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";
 
 export function PopoverItem({
   children,
@@ -323,7 +327,7 @@ export function PopoverItem({
       tabIndex={focusActive ? 0 : -1}
       data-active={visualActive ? "true" : undefined}
       disabled={disabled}
-      className={`${ACTIVE_HIGHLIGHT}${className ? ` ${className}` : ""}`}
+      className={`${checked || selected ? HIGHLIGHT_SELECTED : HIGHLIGHT_UNSELECTED}${className ? ` ${className}` : ""}`}
     >
       {children}
     </button>
diff --git a/frontend/src/components/NavSidebar.tsx b/frontend/src/components/NavSidebar.tsx
index d9cac4c0..15c7d638 100644
--- a/frontend/src/components/NavSidebar.tsx
+++ b/frontend/src/components/NavSidebar.tsx
@@ -322,7 +322,7 @@ export default function NavSidebar({
               ref={acctPop.refs.setReference}
               {...acctPop.getReferenceProps()}
               title={slim ? `${name} · ${roleLabel}` : undefined}
-              className={`${rowBase} ${slim ? "justify-center px-0" : ""} text-muted hover:text-fg hover:bg-card`}
+              className={`${rowBase} selectable ${slim ? "justify-center px-0" : ""} text-muted hover:text-fg hover:bg-card`}
             >
               <span className="relative shrink-0">
                 <AvatarImg
@@ -367,7 +367,7 @@ export default function NavSidebar({
                       key={a.id}
                       onClick={() => switchTo(a.id)}
                       title={t("header.account.switchTo", { name: a.display_name ?? a.email })}
-                      className="w-full flex items-center gap-2.5 px-2 py-1.5 rounded-lg hover:bg-card transition"
+                      className="selectable w-full flex items-center gap-2.5 px-2 py-1.5 rounded-lg hover:bg-card transition"
                     >
                       <AvatarImg
                         src={a.avatar_url}
@@ -393,14 +393,14 @@ export default function NavSidebar({
                     clearActiveAccount();
                     window.location.href = "/auth/login";
                   }}
-                  className="w-full flex items-center gap-2 text-sm px-2 py-2 rounded-lg text-muted hover:text-fg hover:bg-card transition"
+                  className="selectable w-full flex items-center gap-2 text-sm px-2 py-2 rounded-lg text-muted hover:text-fg hover:bg-card transition"
                 >
                   <UserPlus className="w-4 h-4" />
                   {t("header.account.addAccount")}
                 </button>
                 <button
                   onClick={logout}
-                  className="w-full flex items-center gap-2 text-sm px-2 py-2 rounded-lg text-muted hover:text-fg hover:bg-card transition"
+                  className="selectable w-full flex items-center gap-2 text-sm px-2 py-2 rounded-lg text-muted hover:text-fg hover:bg-card transition"
                 >
                   <LogOut className="w-4 h-4" />
                   {t("header.account.signOut")}
diff --git a/frontend/src/components/SavedViewsWidget.tsx b/frontend/src/components/SavedViewsWidget.tsx
index c91f4ec5..bd853f5c 100644
--- a/frontend/src/components/SavedViewsWidget.tsx
+++ b/frontend/src/components/SavedViewsWidget.tsx
@@ -288,14 +288,15 @@ function ViewRow({
         {...attributes}
         {...listeners}
         title={t("views.reorder")}
-        className="p-1 text-muted/60 hover:text-muted cursor-grab touch-none shrink-0"
+        className="p-1 text-muted/60 hover:text-muted cursor-grab touch-none shrink-0 rounded-sm outline-hidden focus-visible:outline-2 focus-visible:outline-accent/60"
       >
         <GripVertical className="w-3.5 h-3.5" />
       </button>
       <button
         onClick={onApply}
         title={t("views.apply")}
-        className={`flex-1 min-w-0 text-left text-xs py-1 truncate ${
+        aria-current={active ? "true" : undefined}
+        className={`flex-1 min-w-0 text-left text-xs py-1 truncate rounded-sm outline-hidden focus-visible:outline-2 focus-visible:outline-accent/60 ${
           active ? "text-accent font-medium" : "text-fg"
         }`}
       >
@@ -305,10 +306,10 @@ function ViewRow({
         <button
           onClick={onToggleDefault}
           title={view.is_default ? t("views.isDefault") : t("views.makeDefault")}
-          className={`p-1 rounded transition ${
+          className={`p-1 rounded outline-hidden transition focus-visible:outline-2 focus-visible:outline-accent/60 ${
             view.is_default
               ? "text-accent"
-              : "text-muted opacity-0 group-hover:opacity-100 hover:text-accent"
+              : "text-muted opacity-0 group-hover:opacity-100 group-focus-within:opacity-100 hover:text-accent"
           }`}
         >
           <Star className={`w-3.5 h-3.5 ${view.is_default ? "fill-current" : ""}`} />
@@ -316,21 +317,21 @@ function ViewRow({
         <button
           onClick={onShare}
           title={t("views.share")}
-          className="p-1 rounded-sm text-muted opacity-0 group-hover:opacity-100 hover:text-fg transition"
+          className="p-1 rounded-sm text-muted opacity-0 group-hover:opacity-100 group-focus-within:opacity-100 hover:text-fg transition outline-hidden focus-visible:outline-2 focus-visible:outline-accent/60"
         >
           <Share2 className="w-3.5 h-3.5" />
         </button>
         <button
           onClick={onStartRename}
           title={t("views.rename")}
-          className="p-1 rounded-sm text-muted opacity-0 group-hover:opacity-100 hover:text-fg transition"
+          className="p-1 rounded-sm text-muted opacity-0 group-hover:opacity-100 group-focus-within:opacity-100 hover:text-fg transition outline-hidden focus-visible:outline-2 focus-visible:outline-accent/60"
         >
           <Pencil className="w-3.5 h-3.5" />
         </button>
         <button
           onClick={onDelete}
           title={t("views.delete")}
-          className="p-1 rounded-sm text-muted opacity-0 group-hover:opacity-100 hover:text-red-400 transition"
+          className="p-1 rounded-sm text-muted opacity-0 group-hover:opacity-100 group-focus-within:opacity-100 hover:text-red-400 transition outline-hidden focus-visible:outline-2 focus-visible:outline-accent/60"
         >
           <Trash2 className="w-3.5 h-3.5" />
         </button>
diff --git a/frontend/src/components/SearchBar.tsx b/frontend/src/components/SearchBar.tsx
index 7b2983bd..2694d3bb 100644
--- a/frontend/src/components/SearchBar.tsx
+++ b/frontend/src/components/SearchBar.tsx
@@ -31,7 +31,7 @@ export default function SearchBar({
     if (onGo && !goDisabled) onGo();
   };
   return (
-    <div className="pointer-events-auto flex-1 min-w-0 max-w-xl h-11 pl-3 pr-2 rounded-2xl glass-menu flex items-center gap-2">
+    <div className="pointer-events-auto flex-1 min-w-0 max-w-xl h-11 pl-3 pr-2 rounded-2xl glass-menu flex items-center gap-2 focus-within:outline-2 focus-within:outline-accent/60">
       <Search className="w-4 h-4 shrink-0 text-muted" />
       <input
         value={value}
diff --git a/frontend/src/components/ShareDialog.tsx b/frontend/src/components/ShareDialog.tsx
index 60e9513e..f101ceb8 100644
--- a/frontend/src/components/ShareDialog.tsx
+++ b/frontend/src/components/ShareDialog.tsx
@@ -130,7 +130,7 @@ function LinkRow({ link, onChanged }: { link: ShareLink; onChanged: () => void }
 
   return (
     <div className="rounded-lg glass-card p-2.5 space-y-2">
-      <div className="flex items-center gap-2">
+      <div className="flex items-center gap-2 rounded-md focus-within:outline-2 focus-within:outline-accent/60 focus-within:outline-offset-2">
         <Link2 className="w-4 h-4 text-muted shrink-0" />
         <input
           readOnly
diff --git a/frontend/src/components/tableHeader.tsx b/frontend/src/components/tableHeader.tsx
index 39086bbf..6d1add2f 100644
--- a/frontend/src/components/tableHeader.tsx
+++ b/frontend/src/components/tableHeader.tsx
@@ -158,7 +158,7 @@ function FilterFunnel<T>({
               checked={!filterOn}
               onSelect={() => onApply(col.key, "")}
               label={t("datatable.all")}
-              className={`text-left text-xs px-2 py-1.5 rounded-md outline-hidden transition data-active:ring-1 data-active:ring-accent ${
+              className={`text-left text-xs px-2 py-1.5 rounded-md outline-hidden transition ${
                 !filterOn ? "bg-accent text-accent-fg" : "text-muted hover:bg-card"
               }`}
             >
@@ -171,7 +171,7 @@ function FilterFunnel<T>({
                 checked={value === o.value}
                 onSelect={() => onApply(col.key, o.value)}
                 label={o.label}
-                className={`text-left text-xs px-2 py-1.5 rounded-md outline-hidden transition data-active:ring-1 data-active:ring-accent ${
+                className={`text-left text-xs px-2 py-1.5 rounded-md outline-hidden transition ${
                   value === o.value ? "bg-accent text-accent-fg" : "text-muted hover:bg-card"
                 }`}
               >
diff --git a/frontend/src/index.css b/frontend/src/index.css
index 300cf9bf..f44109df 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -265,69 +265,94 @@ body {
 }
 
 /* ===== Liquid-glass surface system (theme-aware, GPU-light) ===== */
-.glass {
-  /* Frosted overlay surface: translucent enough that the blurred backdrop shows
+/* In @layer components so a JSX shadow-* utility (which lives in @layer utilities, always above
+   components) can override a glass surface's default box-shadow again. Before v4/R9 these rules were
+   unlayered and always won, so ~9 `shadow-*` on glass surfaces were silent no-ops. The perf-mode and
+   :hover overrides below stay UNLAYERED on purpose (they must beat the utility). */
+@layer components {
+  .glass {
+    /* Frosted overlay surface: translucent enough that the blurred backdrop shows
      through (the glassy look), opaque enough that the background isn't distracting.
      The strong blur turns whatever is behind into soft colour, not a sharp image.
      Layer 1 (top) = the optional scrim; layer 2 = the translucent surface tint. */
-  background:
-    linear-gradient(
-      color-mix(in srgb, var(--bg) var(--glass-scrim), transparent),
-      color-mix(in srgb, var(--bg) var(--glass-scrim), transparent)
-    ),
-    color-mix(in srgb, var(--surface) var(--glass-surface-alpha), transparent);
-  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
-  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
-  border: 1px solid color-mix(in srgb, var(--border) var(--glass-border-alpha), transparent);
-  border-top-color: color-mix(
-    in srgb,
-    #fff var(--glass-edge),
-    color-mix(in srgb, var(--border) var(--glass-border-alpha), transparent)
-  );
-  box-shadow:
-    inset 0 1px 0 color-mix(in srgb, #fff var(--glass-inset), transparent),
-    0 18px 44px -16px rgba(0, 0, 0, 0.6);
-}
-.glass-card {
-  /* No backdrop-filter here: cards render in bulk (feed grid) over a solid background
+    background:
+      linear-gradient(
+        color-mix(in srgb, var(--bg) var(--glass-scrim), transparent),
+        color-mix(in srgb, var(--bg) var(--glass-scrim), transparent)
+      ),
+      color-mix(in srgb, var(--surface) var(--glass-surface-alpha), transparent);
+    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
+    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
+    border: 1px solid color-mix(in srgb, var(--border) var(--glass-border-alpha), transparent);
+    border-top-color: color-mix(
+      in srgb,
+      #fff var(--glass-edge),
+      color-mix(in srgb, var(--border) var(--glass-border-alpha), transparent)
+    );
+    box-shadow:
+      inset 0 1px 0 color-mix(in srgb, #fff var(--glass-inset), transparent),
+      0 18px 44px -16px rgba(0, 0, 0, 0.6);
+  }
+  .glass-card {
+    /* No backdrop-filter here: cards render in bulk (feed grid) over a solid background
      where blur adds almost nothing visually but is GPU-expensive and triggers reflow.
      Translucency + border + depth keep the look; blur is reserved for .glass overlays. */
-  background:
-    linear-gradient(
-      color-mix(in srgb, var(--bg) var(--glass-scrim), transparent),
-      color-mix(in srgb, var(--bg) var(--glass-scrim), transparent)
-    ),
-    color-mix(in srgb, var(--card) var(--glass-card-alpha), transparent);
-  border: 1px solid color-mix(in srgb, var(--border) 65%, transparent);
-  border-top-color: color-mix(
-    in srgb,
-    #fff var(--glass-edge),
-    color-mix(in srgb, var(--border) 65%, transparent)
-  );
-  box-shadow:
-    inset 0 1px 0 color-mix(in srgb, #fff calc(var(--glass-inset) / 2), transparent),
-    0 8px 22px -14px rgba(0, 0, 0, 0.45);
-}
-.glass-menu {
-  /* Floating menus/popovers hover over undimmed content (no backdrop scrim like dialogs),
+    background:
+      linear-gradient(
+        color-mix(in srgb, var(--bg) var(--glass-scrim), transparent),
+        color-mix(in srgb, var(--bg) var(--glass-scrim), transparent)
+      ),
+      color-mix(in srgb, var(--card) var(--glass-card-alpha), transparent);
+    border: 1px solid color-mix(in srgb, var(--border) 65%, transparent);
+    border-top-color: color-mix(
+      in srgb,
+      #fff var(--glass-edge),
+      color-mix(in srgb, var(--border) 65%, transparent)
+    );
+    box-shadow:
+      inset 0 1px 0 color-mix(in srgb, #fff calc(var(--glass-inset) / 2), transparent),
+      0 8px 22px -14px rgba(0, 0, 0, 0.45);
+  }
+  .glass-menu {
+    /* Floating menus/popovers hover over undimmed content (no backdrop scrim like dialogs),
      so they must be near-opaque to stay readable — only a hint of translucency + the blur. */
-  background:
-    linear-gradient(
-      color-mix(in srgb, var(--bg) var(--glass-scrim), transparent),
-      color-mix(in srgb, var(--bg) var(--glass-scrim), transparent)
-    ),
-    color-mix(in srgb, var(--surface) var(--glass-menu-alpha), transparent);
-  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
-  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
-  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
-  border-top-color: color-mix(
-    in srgb,
-    #fff var(--glass-edge),
-    color-mix(in srgb, var(--border) 80%, transparent)
-  );
-  box-shadow:
-    inset 0 1px 0 color-mix(in srgb, #fff calc(var(--glass-inset) - 2%), transparent),
-    0 18px 44px -16px rgba(0, 0, 0, 0.6);
+    background:
+      linear-gradient(
+        color-mix(in srgb, var(--bg) var(--glass-scrim), transparent),
+        color-mix(in srgb, var(--bg) var(--glass-scrim), transparent)
+      ),
+      color-mix(in srgb, var(--surface) var(--glass-menu-alpha), transparent);
+    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
+    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
+    border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
+    border-top-color: color-mix(
+      in srgb,
+      #fff var(--glass-edge),
+      color-mix(in srgb, var(--border) 80%, transparent)
+    );
+    box-shadow:
+      inset 0 1px 0 color-mix(in srgb, #fff calc(var(--glass-inset) - 2%), transparent),
+      0 18px 44px -16px rgba(0, 0, 0, 0.6);
+  }
+
+  /* R9: standard interactive-row recipe. The hover tint menu/list rows already use, PLUS the
+     app-wide focus-visible ring that was missing on non-input controls (buttons, rows, menu items) —
+     the biggest single a11y win. In @layer components so a consumer's own utilities still win; the
+     accent ring renders correctly under v4 (color-mix), matching the input ring in ui/form.tsx. */
+  .selectable {
+    transition:
+      background-color 0.15s ease,
+      color 0.15s ease;
+  }
+  .selectable:hover {
+    background-color: var(--card);
+  }
+  .selectable:focus-visible {
+    /* outline (not a box-shadow ring) so it never fights a glass surface's box-shadow and never gets
+       clipped by an overflow-hidden ancestor; inset offset keeps it inside tightly-packed rows. */
+    outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
+    outline-offset: -2px;
+  }
 }
 .glass-hover:hover {
   border-color: color-mix(in srgb, var(--accent) 55%, transparent);