refactor(docs): remove package version display from version switcher

Marketing the per-line latest patch was inaccurate: the latest entry's
minor-pinned match (2.0.x) excluded newer minors like css 2.1.0. Drop the
registry fetch and version rendering; keep domain unification and v2.0 latest.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: junghyeonsu

docs/components/react-version-switcher.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { IconCheckmarkLine, IconChevronDownLine } from "@karrotmarket/react-monochrome-icon";
-import { useEffect, useState } from "react";
+import { useState } from "react";
 import { Popover, PopoverContent, PopoverTrigger } from "fumadocs-ui/components/ui/popover";
 import { buttonVariants } from "fumadocs-ui/components/ui/button";
 import { cva } from "class-variance-authority";
@@ -20,47 +20,11 @@ const itemVariants = cva(
   "text-sm p-2 rounded-lg inline-flex items-center gap-2 hover:text-fd-accent-foreground hover:bg-fd-accent [&_svg]:size-4",
 );
 
-// "v2.0 (latest)" → "2.0", "v1.1" → "1.1", "alpha" → undefined
-const lineOf = (label: string) => label.match(/(\d+\.\d+)/)?.[1];
-
-// 같은 라인(x.y) 내 버전끼리 패치 오름차순 비교
-const cmpPatch = (a: string, b: string) =>
-  a.split(".").reduce((acc, n, i) => acc || Number(n) - Number(b.split(".")[i]), 0);
-
-const latestForLine = (data: { versions: Record<string, unknown> }, line: string) =>
-  Object.keys(data.versions)
-    .filter((v) => v.startsWith(`${line}.`) && !v.includes("-")) // prerelease 제외
-    .sort(cmpPatch)
-    .at(-1);
-
-type PackageVersions = Record<string, { react?: string; css?: string }>;
-
 export function ReactVersionSwitcher() {
   const [open, setOpen] = useState(false);
-  const [pkgVersions, setPkgVersions] = useState<PackageVersions>({});
 
   const current = VERSIONS.find((v) => v.label === CURRENT_VERSION) ?? VERSIONS[0];
 
-  // 드롭다운을 처음 열 때 npm registry에서 각 라인의 최신 안정 패치를 1회 조회
-  useEffect(() => {
-    if (!open || Object.keys(pkgVersions).length) return;
-    const headers = { Accept: "application/vnd.npm.install-v1+json" }; // 축약 메타데이터
-    Promise.all([
-      fetch("https://registry.npmjs.org/@seed-design/react", { headers }).then((r) => r.json()),
-      fetch("https://registry.npmjs.org/@seed-design/css", { headers }).then((r) => r.json()),
-    ])
-      .then(([react, css]) => {
-        const map: PackageVersions = {};
-        for (const { label } of VERSIONS) {
-          const line = lineOf(label);
-          if (!line) continue; // alpha 등 라인 매칭 안 되는 항목은 스킵
-          map[label] = { react: latestForLine(react, line), css: latestForLine(css, line) };
-        }
-        setPkgVersions(map);
-      })
-      .catch(() => {}); // 조회 실패 시 버전 숫자만 생략, 셀렉터는 정상 동작
-  }, [open, pkgVersions]);
-
   return (
     <Popover open={open} onOpenChange={setOpen}>
       <PopoverTrigger
@@ -76,32 +40,17 @@ export function ReactVersionSwitcher() {
         </div>
       </PopoverTrigger>
       <PopoverContent className="flex flex-col overflow-auto">
-        {VERSIONS.map((version) => {
-          const pkg = pkgVersions[version.label];
-          const isCurrent = version === current;
-          const content = (
-            <>
-              <span className="flex flex-col text-start">
-                {version.label}
-                {pkg && (pkg.react || pkg.css) && (
-                  <span className="text-fd-muted-foreground text-xs">
-                    react {pkg.react ?? "—"} · css {pkg.css ?? "—"}
-                  </span>
-                )}
-              </span>
-              {isCurrent && <IconCheckmarkLine />}
-            </>
-          );
-
-          return isCurrent ? (
+        {VERSIONS.map((version) =>
+          version === current ? (
             <div
               aria-current
               key={version.label}
               className={itemVariants({
                 className: "text-fd-primary pointer-events-none justify-between",
               })}
             >
-              {content}
+              {version.label}
+              <IconCheckmarkLine />
             </div>
           ) : (
             <a
@@ -112,10 +61,10 @@ export function ReactVersionSwitcher() {
               className={itemVariants({ className: "justify-between" })}
               onClick={() => setOpen(false)}
             >
-              {content}
+              {version.label}
             </a>
-          );
-        })}
+          ),
+        )}
       </PopoverContent>
     </Popover>
   );