feat(home): make upstream proof-band logos clickable (expand PRs in place)

components/home/upstream-proof-band.tsx

@@ -1,8 +1,11 @@
 import { getTranslations } from "next-intl/server";
 import { ArrowRight } from "lucide-react";
 import { Link } from "@/i18n/navigation";
-import { aggregates, findRepo, type UpstreamRepo } from "@/lib/upstream";
-import { BrandIcon } from "@/components/upstream/brand-icon";
+import { aggregates, findRepo, prsForRepo } from "@/lib/upstream";
+import {
+  UpstreamProofMarquee,
+  type MarqueeBrand,
+} from "@/components/home/upstream-proof-marquee";
 
 /**
  * Home trust band — promotes the /upstream OSS proof (merged PRs into the
@@ -31,14 +34,21 @@ const MARQUEE: { slug: string; label: string }[] = [
 
 export async function UpstreamProofBand({ locale }: { locale: string }) {
   const t = await getTranslations({ locale, namespace: "home.upstream" });
+  const tu = await getTranslations({ locale, namespace: "upstream" });
   const agg = aggregates();
 
   const brands = MARQUEE.map((m) => {
     const repo = findRepo(m.slug);
-    return repo ? { ...m, repo } : null;
-  }).filter(
-    (b): b is { slug: string; label: string; repo: UpstreamRepo } => b !== null,
-  );
+    if (!repo) return null;
+    const prs = prsForRepo(m.slug);
+    return {
+      slug: m.slug,
+      label: m.label,
+      repo,
+      prs,
+      prsCountLabel: tu("tile.prsCount", { count: prs.length }),
+    };
+  }).filter((b): b is MarqueeBrand => b !== null);
 
   return (
     <section className="relative border-t border-fg/5 px-6 py-20 md:py-28">
@@ -61,24 +71,11 @@ export async function UpstreamProofBand({ locale }: { locale: string }) {
           {t("sub", { prs: agg.totalPrs, repos: agg.totalRepos })}
         </p>
 
-        <ul className="mt-12 grid grid-cols-3 gap-x-6 gap-y-8 sm:grid-cols-4 md:grid-cols-6">
-          {brands.map(({ slug, label, repo }) => (
-            <li
-              key={slug}
-              className="flex flex-col items-center gap-2 text-center"
-            >
-              <BrandIcon
-                iconSlug={repo.iconSlug}
-                fallbackName={label}
-                customLogoKey={repo.slug}
-                size={40}
-              />
-              <span className="font-mono text-2xs uppercase tracking-wider text-fg-subtle">
-                {label}
-              </span>
-            </li>
-          ))}
-        </ul>
+        <UpstreamProofMarquee
+          brands={brands}
+          viewPrLabel={tu("pr.viewPr")}
+          locale={locale}
+        />
 
         <div className="mt-12">
           <Link

components/home/upstream-proof-marquee.tsx

@@ -0,0 +1,138 @@
+"use client";
+
+import { useState } from "react";
+import type { UpstreamPr, UpstreamRepo } from "@/lib/upstream-schema";
+import { BrandIcon } from "@/components/upstream/brand-icon";
+import { UpstreamPrList } from "@/components/upstream/pr-list";
+import { requestLenisResize } from "@/components/scroll/smooth-scroll";
+import { cn } from "@/lib/cn";
+
+export type MarqueeBrand = {
+  slug: string;
+  label: string;
+  repo: UpstreamRepo;
+  prs: UpstreamPr[];
+  prsCountLabel: string;
+};
+
+/**
+ * Home proof-band logos — clickable. A click expands that repo's merged-PR
+ * card **in place** (a single panel below the grid), with no navigation and
+ * no scroll, so the visitor stays exactly where they were. Deliberately
+ * mirrors the /upstream tile's expand, reusing <UpstreamPrList>.
+ *
+ * `displayedSlug` lags `openSlug` on close so the panel content stays mounted
+ * through the collapse transition (an empty grid-rows row would snap shut).
+ */
+export function UpstreamProofMarquee({
+  brands,
+  viewPrLabel,
+  locale,
+  panelId = "upstream-proof-panel",
+}: {
+  brands: MarqueeBrand[];
+  viewPrLabel: string;
+  locale: string;
+  panelId?: string;
+}) {
+  const [openSlug, setOpenSlug] = useState<string | null>(null);
+  const [displayedSlug, setDisplayedSlug] = useState<string | null>(null);
+
+  function toggle(slug: string) {
+    if (openSlug === slug) {
+      setOpenSlug(null); // keep displayedSlug until the collapse finishes
+    } else {
+      setDisplayedSlug(slug);
+      setOpenSlug(slug);
+    }
+  }
+
+  const isOpen = openSlug !== null;
+  const displayed = brands.find((b) => b.slug === displayedSlug) ?? null;
+
+  return (
+    <div className="mt-12">
+      <ul className="grid grid-cols-3 gap-x-6 gap-y-8 sm:grid-cols-4 md:grid-cols-6">
+        {brands.map(({ slug, label, repo }) => {
+          const active = slug === openSlug;
+          return (
+            <li key={slug}>
+              <button
+                type="button"
+                onClick={() => toggle(slug)}
+                aria-expanded={active}
+                aria-controls={panelId}
+                className="group flex w-full cursor-pointer flex-col items-center gap-2 rounded-xl py-2 text-center focus-visible:outline-2 focus-visible:outline-accent focus-visible:outline-offset-2"
+              >
+                <span
+                  className={cn(
+                    "flex size-14 items-center justify-center rounded-2xl border transition-all duration-300",
+                    active
+                      ? "border-accent/50 bg-accent/10 shadow-[0_0_28px_-8px_oklch(0.65_0.25_295_/0.5)]"
+                      : "border-transparent group-hover:border-fg/10 group-hover:bg-bg-elev-1/60",
+                  )}
+                >
+                  <BrandIcon
+                    iconSlug={repo.iconSlug}
+                    fallbackName={label}
+                    customLogoKey={repo.slug}
+                    size={40}
+                  />
+                </span>
+                <span
+                  className={cn(
+                    "font-mono text-2xs uppercase tracking-wider transition-colors",
+                    active
+                      ? "text-accent"
+                      : "text-fg-subtle group-hover:text-fg",
+                  )}
+                >
+                  {label}
+                </span>
+              </button>
+            </li>
+          );
+        })}
+      </ul>
+
+      <div
+        id={panelId}
+        role="region"
+        onTransitionEnd={(e) => {
+          if (e.propertyName !== "grid-template-rows") return;
+          requestLenisResize();
+          if (openSlug === null) setDisplayedSlug(null);
+        }}
+        className={cn(
+          "grid overflow-hidden transition-[grid-template-rows,opacity] duration-300 ease-out",
+          isOpen ? "grid-rows-[1fr] opacity-100" : "grid-rows-[0fr] opacity-0",
+        )}
+      >
+        <div className="min-h-0">
+          {displayed && (
+            <div className="pt-6">
+              <div className="rounded-2xl border border-accent/25 bg-bg-elev-1/60 backdrop-blur-sm">
+                <div className="flex flex-wrap items-baseline justify-between gap-x-3 gap-y-1 px-5 pt-4">
+                  <h3 className="font-display text-base font-semibold text-fg">
+                    {displayed.label}
+                    <span className="ml-2 font-mono text-2xs uppercase tracking-wider text-fg-subtle">
+                      {displayed.repo.owner}/{displayed.repo.name}
+                    </span>
+                  </h3>
+                  <span className="font-mono text-2xs text-accent">
+                    {displayed.prsCountLabel}
+                  </span>
+                </div>
+                <UpstreamPrList
+                  prs={displayed.prs}
+                  locale={locale}
+                  viewPrLabel={viewPrLabel}
+                />
+              </div>
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}

components/upstream/brand-tile.tsx

@@ -1,9 +1,10 @@
 "use client";
 
 import { useId, useRef } from "react";
-import { ChevronDown, ExternalLink } from "lucide-react";
+import { ChevronDown } from "lucide-react";
 import type { UpstreamPr, UpstreamRepo } from "@/lib/upstream-schema";
 import { BrandIcon } from "@/components/upstream/brand-icon";
+import { UpstreamPrList } from "@/components/upstream/pr-list";
 import { requestLenisResize } from "@/components/scroll/smooth-scroll";
 import { cn } from "@/lib/cn";
 
@@ -32,7 +33,6 @@ export function BrandTile({ repo, prs, open, onToggle, locale, labels }: Props)
     notation: "compact",
     maximumFractionDigits: 1,
   });
-  const df = new Intl.DateTimeFormat(locale, { dateStyle: "medium" });
 
   const starsCompact = nf.format(repo.stars);
   const downloadsCompact =
@@ -120,36 +120,11 @@ export function BrandTile({ repo, prs, open, onToggle, locale, labels }: Props)
         )}
       >
         <div className="min-h-0">
-          <ul className="border-t border-fg/8 px-5 py-4">
-            {prs.map((pr) => (
-              <li key={pr.number} className="group/pr py-2 first:pt-0 last:pb-0">
-                <a
-                  href={pr.url}
-                  target="_blank"
-                  rel="noopener noreferrer"
-                  className="flex items-start justify-between gap-3 rounded-lg -mx-2 px-2 py-1.5 hover:bg-bg-elev-2/50 transition-colors focus-visible:outline-2 focus-visible:outline-accent focus-visible:outline-offset-2"
-                >
-                  <div className="min-w-0 flex-1">
-                    <div className="flex items-center gap-2 font-mono text-2xs uppercase tracking-wider">
-                      <span className="text-accent">#{pr.number}</span>
-                      <span className="text-fg-subtle">
-                        {df.format(new Date(pr.mergedAt))}
-                      </span>
-                    </div>
-                    <p className="mt-1 text-sm text-fg-muted group-hover/pr:text-fg transition-colors">
-                      {pr.title}
-                    </p>
-                  </div>
-                  <ExternalLink
-                    aria-hidden
-                    size={14}
-                    className="mt-1 shrink-0 text-fg-subtle group-hover/pr:text-accent transition-colors"
-                  />
-                  <span className="sr-only">{labels.viewPr}</span>
-                </a>
-              </li>
-            ))}
-          </ul>
+          <UpstreamPrList
+            prs={prs}
+            locale={locale}
+            viewPrLabel={labels.viewPr}
+          />
         </div>
       </div>
     </article>

components/upstream/pr-list.tsx

@@ -0,0 +1,52 @@
+import { ExternalLink } from "lucide-react";
+import type { UpstreamPr } from "@/lib/upstream-schema";
+
+/**
+ * Shared merged-PR list — the expandable body used by both the `/upstream`
+ * brand tiles and the home proof-band panel. One source of truth for the
+ * PR-row styling so the two never drift.
+ */
+export function UpstreamPrList({
+  prs,
+  locale,
+  viewPrLabel,
+}: {
+  prs: readonly UpstreamPr[];
+  locale: string;
+  viewPrLabel: string;
+}) {
+  const df = new Intl.DateTimeFormat(locale, { dateStyle: "medium" });
+
+  return (
+    <ul className="border-t border-fg/8 px-5 py-4">
+      {prs.map((pr) => (
+        <li key={pr.number} className="group/pr py-2 first:pt-0 last:pb-0">
+          <a
+            href={pr.url}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="flex items-start justify-between gap-3 rounded-lg -mx-2 px-2 py-1.5 hover:bg-bg-elev-2/50 transition-colors focus-visible:outline-2 focus-visible:outline-accent focus-visible:outline-offset-2"
+          >
+            <div className="min-w-0 flex-1">
+              <div className="flex items-center gap-2 font-mono text-2xs uppercase tracking-wider">
+                <span className="text-accent">#{pr.number}</span>
+                <span className="text-fg-subtle">
+                  {df.format(new Date(pr.mergedAt))}
+                </span>
+              </div>
+              <p className="mt-1 text-sm text-fg-muted group-hover/pr:text-fg transition-colors">
+                {pr.title}
+              </p>
+            </div>
+            <ExternalLink
+              aria-hidden
+              size={14}
+              className="mt-1 shrink-0 text-fg-subtle group-hover/pr:text-accent transition-colors"
+            />
+            <span className="sr-only">{viewPrLabel}</span>
+          </a>
+        </li>
+      ))}
+    </ul>
+  );
+}