fix(design): an audit of the S3d claims — the float shadow, filter hints, one action size per row (E28 S3d)

- A glass role's shadow is one token (shadow-float); the header search's drop-shadow utility had
  replaced its top highlight, and the debug pill's shadow-lg did the same. The surface-role lint
  rule now refuses a shadow size beside a role.
- Plex: every value that filters carries a hint (genre, certificate, studio had none), and the facts
  panel's year and certificate filter like the header's. filterKeyword -> filterValue.
- Downloads: the row resized its buttons with a [&_button] override that the save link escaped
  (28px beside 32px); the size is the primitive's md rung now.

docs/DESIGN.md

@@ -174,7 +174,8 @@ Also in force:
   violation. A call site names the ROLE (`SURFACE.panel` / `drawer` / `card` / `menu` / `popover` / `tooltip`,
   `ui/surfaces.ts`), which brings the tier AND the radius; a page section is a panel, and what floats over
   undimmed content (a menu, a hover card, a status popover, a toast, a tooltip) is `.glass-menu`. A bare glass
-  class is a lint error.
+  class is a lint error. A role's depth is its own shadow (the top highlight + the drop); a `shadow-*` size beside
+  a role would replace both and is a lint error too — a field that floats takes `shadow-float`, the same shadow.
 - **Static vs pressable (owner, S3d):** a label that does nothing (a topic, a keyword, a status, a count) is a
   flat, tonal `Badge` with no edge; everything that does something has an edge (a chip, a trigger, a field).
   A genre that filters the library is a chip; the same genre where it can't is a badge.

frontend/eslint.config.js

@@ -170,11 +170,20 @@ const SURFACE_OWNERS = new Set([
   "fieldStyles.ts", // the header search floats over the page
 ]);
 const GLASS_TIER = /^glass(-card|-menu)?$/;
+// A glass surface's depth is its own box-shadow, whose inset top highlight a `shadow-*` utility would
+// replace wholesale (the header search and the debug pill lost theirs). A shadow COLOUR only sets a
+// variable, and `shadow-float` IS the surface's shadow, so both pass.
+const SHADOW_SIZE = /^shadow-(xs|sm|md|lg|xl|2xl|\[.+\]|\(.+\))$/;
+const isShadowSize = (w) => SHADOW_SIZE.test(w.slice(w.lastIndexOf(":") + 1));
+const isSurfaceRole = (n) =>
+  n?.type === "MemberExpression" && n.object.type === "Identifier" && n.object.name === "SURFACE";
 const surfaceRole = {
   meta: {
     type: "problem",
     messages: {
       raw: "A bare `{{tier}}` class: use a role from ui/surfaces.ts (SURFACE.panel / drawer / card / menu / popover / tooltip), which brings the radius too.",
+      shadow:
+        "`{{shadow}}` on a glass surface replaces its own shadow and drops the top highlight; the role's depth is the intended one.",
     },
   },
   create(context) {
@@ -191,6 +200,20 @@ const surfaceRole = {
       const tier = words.find((w) => GLASS_TIER.test(w));
       if (tier) context.report({ node, messageId: "raw", data: { tier } });
     };
+    // A role plus a shadow size in one class list: `${SURFACE.x} shadow-lg` or clsx(SURFACE.x, "shadow-lg").
+    const shadowBeside = (node, parts) => {
+      if (!parts.some(isSurfaceRole)) return;
+      for (const part of parts) {
+        const text =
+          part.type === "TemplateElement"
+            ? part.value.cooked
+            : part.type === "Literal" && typeof part.value === "string"
+              ? part.value
+              : "";
+        const shadow = text.split(/\s+/).find(isShadowSize);
+        if (shadow) context.report({ node, messageId: "shadow", data: { shadow } });
+      }
+    };
     return {
       Literal(node) {
         check(node, node.value);
@@ -198,6 +221,12 @@ const surfaceRole = {
       TemplateElement(node) {
         check(node, node.value.cooked);
       },
+      TemplateLiteral(node) {
+        shadowBeside(node, [...node.quasis, ...node.expressions]);
+      },
+      CallExpression(node) {
+        shadowBeside(node, node.arguments);
+      },
     };
   },
 };

frontend/src/components/DebugRecorder.tsx

@@ -153,7 +153,7 @@ function RecorderPill() {
     <div
       role="group"
       aria-label={t("recorder.pill.label")}
-      className={`relative ${SURFACE.floating} h-12 pl-3 sm:pl-4 pr-1.5 flex items-center gap-1.5 sm:gap-2 shadow-lg ${
+      className={`relative ${SURFACE.floating} h-12 pl-3 sm:pl-4 pr-1.5 flex items-center gap-1.5 sm:gap-2 ${
         hidden ? "invisible" : ""
       }`}
     >

frontend/src/components/DownloadCenter.tsx

@@ -160,7 +160,7 @@ export default function DownloadCenter() {
   if (!tabs.some((tb) => tb.id === tab)) setTab("queue");
 
   const saveBtn = (job: DownloadJob) => (
-    <IconLink href={api.downloadFileUrl(job.id)} label={t("downloads.actions.download")}>
+    <IconLink href={api.downloadFileUrl(job.id)} label={t("downloads.actions.download")} size="md">
       <Download />
     </IconLink>
   );

frontend/src/components/PlexInfo.dom.test.tsx

@@ -101,6 +101,26 @@ describe("PlexInfo enriched detail (page)", () => {
     expect(onFilter).toHaveBeenCalledWith({ keywords: ["heist"] });
   });
 
+  // E28: every value that filters says so on hover — the genre, certificate and studio had no hint
+  // while the keyword and the year did — and a value filters in the facts panel as in the header.
+  it("every filtering value carries a filter hint", () => {
+    wrap(<PlexInfo detail={detail} variant="page" onFilter={() => {}} />);
+    for (const v of ["heist", "Crime", "R", "Studio A"])
+      for (const el of screen.getAllByText(v))
+        expect(el.closest("[title]")?.getAttribute("title")).toBe(`plex.info.filterValue:${v}`);
+  });
+
+  it("the facts panel's year and certificate filter like the header's", () => {
+    const onFilter = vi.fn();
+    wrap(<PlexInfo detail={detail} variant="page" onFilter={onFilter} />);
+    const [, factsCert] = screen.getAllByText("R");
+    fireEvent.click(factsCert!);
+    expect(onFilter).toHaveBeenLastCalledWith({ contentRatings: ["R"] });
+    const [, factsYear] = screen.getAllByText("2010");
+    fireEvent.click(factsYear!);
+    expect(onFilter).toHaveBeenLastCalledWith({ yearMin: 2010, yearMax: 2010 });
+  });
+
   it("crew members open the person page on click", () => {
     const onOpenPerson = vi.fn();
     wrap(<PlexInfo detail={detail} variant="page" onOpenPerson={onOpenPerson} />);

frontend/src/components/PlexInfo.tsx

@@ -156,16 +156,42 @@ function FactsPanel({
   const tmdb = detail.tmdb;
   const studios = tmdb?.studios?.length ? tmdb.studios : detail.studio ? [detail.studio] : [];
   const rows: { key: string; label: string; node: ReactNode }[] = [];
-  if (detail.year != null)
+  // The same values filter here as in the header above (year, certificate, studios).
-    rows.push({ key: "year", label: t("plex.info.facts.release"), node: detail.year });
+  const year = detail.year;
+  if (year != null)
+    rows.push({
+      key: "year",
+      label: t("plex.info.facts.release"),
+      node: (
+        <Filterable
+          title={onFilter ? t("plex.info.filterYear", { year }) : undefined}
+          onClick={onFilter ? () => onFilter({ yearMin: year, yearMax: year }) : undefined}
+          className="hover:text-accent"
+        >
+          {year}
+        </Filterable>
+      ),
+    });
   if (detail.duration_seconds)
     rows.push({
       key: "runtime",
       label: t("plex.info.facts.runtime"),
       node: formatRuntime(detail.duration_seconds),
     });
-  if (detail.content_rating)
+  const cert = detail.content_rating;
-    rows.push({ key: "cert", label: t("plex.info.facts.cert"), node: detail.content_rating });
+  if (cert)
+    rows.push({
+      key: "cert",
+      label: t("plex.info.facts.cert"),
+      node: (
+        <Filterable
+          onClick={onFilter ? () => onFilter({ contentRatings: [cert] }) : undefined}
+          className="hover:text-accent"
+        >
+          {cert}
+        </Filterable>
+      ),
+    });
   if (tmdb?.budget)
     rows.push({ key: "budget", label: t("plex.info.facts.budget"), node: money(tmdb.budget) });
   if (tmdb?.revenue)
@@ -230,7 +256,6 @@ function KeywordsPanel({
           <Filterable
             key={k}
             tag
-            title={onFilter ? t("plex.info.filterKeyword", { name: k }) : undefined}
             onClick={onFilter ? () => onFilter({ keywords: [k] }) : undefined}
           >
             {k}

frontend/src/components/downloadRow.dom.test.tsx

@@ -140,4 +140,18 @@ describe("DownloadRow · keyboard", () => {
     expect(screen.getByTitle("play").hasAttribute("data-nav-open")).toBe(true);
     expect(screen.getByTitle("delete").hasAttribute("data-nav-open")).toBe(false);
   });
+
+  // E28: the row once resized its actions with a `[&_button]:size-8` override, which a save LINK in the
+  // same row escaped (28px beside 32px buttons). The size is the primitive's own rung, set by IconBtn.
+  it("sizes its actions through the primitive's rung, not a descendant override", () => {
+    const { container } = render(
+      <DownloadRow job={baseJob}>
+        <IconBtn onClick={() => {}} title="play">
+          p
+        </IconBtn>
+      </DownloadRow>,
+    );
+    expect(screen.getByTitle("play").className).toContain("size-8");
+    expect(container.innerHTML).not.toContain("[&amp;_button]");
+  });
 });

frontend/src/components/downloadRow.tsx

@@ -141,6 +141,7 @@ export function IconBtn({
   return (
     <IconButton
       variant={danger ? "danger" : "ghost"}
+      size="md"
       onClick={onClick}
       data-nav-open={open ? "" : undefined}
       label={title}
@@ -304,7 +305,7 @@ export function DownloadRow({
       {/* Row action buttons: the md rung here (the row stands alone), the sm rung in the modals, one
           IconBtn for both. `shrink-0` + no wrap keeps them on the title's line; the text column
           shrinks instead. */}
-      <div className="flex items-start gap-1 shrink-0 [&_button]:size-8">{children}</div>
+      <div className="flex items-start gap-1 shrink-0">{children}</div>
     </div>
   );
 }

frontend/src/components/plexDetailUi.tsx

@@ -22,8 +22,9 @@ import { Chip } from "./ui/Chip";
 // customize menu that toggles them. The prefs hook, backdrop helpers and epLabel live in plexDetail.ts.
 
 // A metadata value that filters the grid when clicked (if onClick is wired), else plain text. Shared
-// by the movie info page (PlexInfo) and the unified grid / show pages (PlexBrowse). The optional
+// by the movie info page (PlexInfo) and the unified grid / show pages (PlexBrowse). A filtering value
-// `title` gives a hover hint (e.g. "Filter by 1998"); callers that don't need it just omit it.
+// always says so on hover: `title` is a caller's specific hint ("Show titles from 1998"), else the
+// generic "Filter by …" from the value's own text.
 export function Filterable({
   onClick,
   title,
@@ -41,9 +42,15 @@ export function Filterable({
   onDark?: boolean;
   children: ReactNode;
 }) {
+  const { t } = useTranslation();
+  const hint =
+    title ??
+    (onClick && (typeof children === "string" || typeof children === "number")
+      ? t("plex.info.filterValue", { name: children })
+      : undefined);
   if (tag)
     return onClick ? (
-      <Chip variant="token" onClick={onClick} title={title}>
+      <Chip variant="token" onClick={onClick} title={hint}>
         {children}
       </Chip>
     ) : (
@@ -53,7 +60,7 @@ export function Filterable({
   return (
     <Pressable
       onClick={onClick}
-      title={title}
+      title={hint}
       className={`${className ?? ""} cursor-pointer hover:text-accent transition`}
     >
       {children}

frontend/src/components/plexViews.tsx

@@ -397,6 +397,7 @@ export function PlexShowView({
             <div className="mt-1 flex flex-wrap items-center gap-x-2 gap-y-0.5 text-sm text-muted">
               {show.year != null && (
                 <Filterable
+                  title={onFilter ? t("plex.info.filterYear", { year: show.year }) : undefined}
                   onClick={
                     onFilter
                       ? () => onFilter({ yearMin: show.year, yearMax: show.year })
@@ -407,15 +408,18 @@ export function PlexShowView({
                 </Filterable>
               )}
               {show.content_rating && (
-                <Filterable
+                <span>
-                  onClick={
+                  ·{" "}
-                    onFilter
+                  <Filterable
-                      ? () => onFilter({ contentRatings: [show.content_rating!] })
+                    onClick={
-                      : undefined
+                      onFilter
-                  }
+                        ? () => onFilter({ contentRatings: [show.content_rating!] })
-                >
+                        : undefined
-                  · {show.content_rating}
+                    }
-                </Filterable>
+                  >
+                    {show.content_rating}
+                  </Filterable>
+                </span>
               )}
               {show.season_count != null && (
                 <span>· {t("plex.seasons", { count: show.season_count })}</span>
@@ -432,6 +436,9 @@ export function PlexShowView({
                     onClick={
                       onFilter ? () => onFilter({ ratingMin: Math.floor(score) }) : undefined
                     }
+                    title={
+                      onFilter ? t("plex.info.filterRating", { n: Math.floor(score) }) : undefined
+                    }
                     className={`inline-flex items-center gap-1 ${onFilter ? "cursor-pointer hover:text-accent" : "cursor-default"}`}
                   >
                     {/* decorative rating gold — intentionally NOT a status token */}

frontend/src/components/ui/fieldStyles.ts

@@ -40,7 +40,8 @@ const BASE =
 
 // `floating`: the field hovers over the scrolling page (the header search), so it keeps the glass-menu
 // surface under its edge instead of a see-through one (A2: what floats over content is glass). The
-// shadow is a utility so the focus ring's box-shadow composes with it instead of dropping it.
+// shadow is the `shadow-float` utility (highlight + drop, the menu's own) so the focus ring's box-shadow
+// composes with it instead of dropping it.
 export function fieldClass({
   size = "md",
   pill = false,
@@ -51,6 +52,6 @@ export function fieldClass({
     BASE,
     SIZES[size],
     pill ? "rounded-full" : "rounded-lg",
-    floating ? "glass-menu shadow-[0_18px_44px_-16px_rgba(0,0,0,0.6)]" : "bg-transparent",
+    floating ? "glass-menu shadow-float" : "bg-transparent",
   );
 }

frontend/src/i18n/locales/en/plex.json

@@ -267,7 +267,7 @@
     "audience": "Audience",
     "keywords": "Keywords",
     "crew": "Crew",
-    "filterKeyword": "Filter by \"{{name}}\"",
+    "filterValue": "Filter by \"{{name}}\"",
     "facts": {
       "title": "Details",
       "release": "Released",

frontend/src/i18n/locales/hu/plex.json

@@ -267,7 +267,7 @@
     "audience": "Közönség",
     "keywords": "Kulcsszavak",
     "crew": "Stáb",
-    "filterKeyword": "Szűrés erre: „{{name}}”",
+    "filterValue": "Szűrés erre: „{{name}}”",
     "facts": {
       "title": "Részletek",
       "release": "Megjelenés",

frontend/src/index.css

@@ -18,6 +18,12 @@
    makes the v4 opacity modifier (bg-accent/40 → color-mix(… var(--accent) 40% …)) pick
    up the active scheme's color. Same pattern as shadcn's v4 theme setup. */
 @theme inline {
+  /* A floating glass surface's shadow: the top specular highlight + the drop. One token so a field that
+     floats (the header search, `shadow-float`) keeps the highlight a menu has — a bare drop-shadow
+     utility would replace both. */
+  --shadow-float:
+    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);
   --color-bg: var(--bg);
   --color-surface: var(--surface);
   --color-card: var(--card);
@@ -499,9 +505,7 @@ body {
       #fff var(--glass-edge),
       color-mix(in srgb, var(--border) 80%, transparent)
     );
-    box-shadow:
+    box-shadow: var(--shadow-float);
-      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

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

@@ -42,3 +42,25 @@ describe("a bare glass tier", () => {
     ).toBe(0);
   });
 });
+
+// A role brings its own shadow, whose inset top highlight a `shadow-*` size would replace wholesale.
+describe("a shadow size beside a role", () => {
+  const SUR = 'import clsx from "clsx";\nimport { SURFACE } from "./ui/surfaces";\n';
+  const tpl = (cls: string) =>
+    `${SUR}export const A = () => <div className={\`\${SURFACE.floating} ${cls}\`} />;\n`;
+  const call = (role: string, cls: string) =>
+    `${SUR}export const B = () => <div className={clsx(SURFACE.${role}, "${cls}")} />;\n`;
+
+  it("is refused in a template and in clsx, variants included", async () => {
+    expect(await hits(tpl("h-12 shadow-lg"))).toBe(1);
+    expect(await hits(call("menu", "hover:shadow-2xl"))).toBe(1);
+  });
+
+  it("passes a shadow colour, shadow-float, and a shadow with no role beside it", async () => {
+    expect(await hits(tpl("shadow-black/20"))).toBe(0);
+    expect(await hits(call("popover", "shadow-float"))).toBe(0);
+    expect(await hits('export const E = () => <div className="rounded-lg shadow-lg" />;\n')).toBe(
+      0,
+    );
+  });
+});