feat(web): surface latest release in landing hero

Add a "What's new" badge above the hero headline that pulls the most
recent entry from the existing changelog dictionary and links straight
to its anchor on /changelog. Visitors now see at a glance that the
product is shipping every few days, addressing the GitHub feedback that
the changelog was buried.

Refs multica-ai/multica#2361

Co-authored-by: multica-agent <github@multica.ai>

apps/web/features/landing/components/landing-hero.tsx

@@ -2,7 +2,7 @@
 
 import Image from "next/image";
 import Link from "next/link";
-import { Download } from "lucide-react";
+import { ArrowRight, Download } from "lucide-react";
 import { useAuthStore } from "@multica/core/auth";
 import { captureDownloadIntent } from "@multica/core/analytics";
 import { useLocale } from "../i18n";
@@ -18,6 +18,7 @@ import {
 export function LandingHero() {
   const { t } = useLocale();
   const user = useAuthStore((s) => s.user);
+  const latestRelease = t.changelog.entries[0];
 
   return (
     <div className="relative min-h-full overflow-hidden bg-[#05070b] text-white">
@@ -29,6 +30,13 @@ export function LandingHero() {
           className="mx-auto max-w-[1320px] px-4 pb-16 pt-28 sm:px-6 sm:pt-32 lg:px-8 lg:pb-24 lg:pt-36"
         >
           <div className="mx-auto max-w-[1120px] text-center">
+            {latestRelease && (
+              <WhatsNewBadge
+                label={t.hero.whatsNewLabel}
+                version={latestRelease.version}
+                title={latestRelease.title}
+              />
+            )}
             <h1 className="font-[family-name:var(--font-serif)] text-[3.65rem] leading-[0.93] tracking-[-0.038em] text-white drop-shadow-[0_10px_34px_rgba(0,0,0,0.32)] sm:text-[4.85rem] lg:text-[6.4rem]">
               {t.hero.headlineLine1}
               <br />
@@ -91,6 +99,39 @@ export function LandingHero() {
   );
 }
 
+function WhatsNewBadge({
+  label,
+  version,
+  title,
+}: {
+  label: string;
+  version: string;
+  title: string;
+}) {
+  const anchor = `release-${version.replace(/\./g, "-")}`;
+  return (
+    <div className="mb-7 flex justify-center">
+      <Link
+        href={`/changelog#${anchor}`}
+        className="group inline-flex max-w-full items-center gap-2 rounded-full border border-white/18 bg-white/8 px-3 py-1.5 text-[12px] font-medium text-white/85 backdrop-blur-sm transition-colors hover:border-white/32 hover:bg-white/12 sm:gap-2.5 sm:text-[13px]"
+      >
+        <span className="inline-flex items-center gap-1.5 rounded-full bg-white/12 px-2 py-0.5 text-[11px] font-semibold uppercase tracking-[0.08em] text-white">
+          {label}
+        </span>
+        <span className="tabular-nums text-white/70">v{version}</span>
+        <span aria-hidden className="hidden h-3 w-px bg-white/18 sm:inline-block" />
+        <span className="hidden truncate sm:inline-block sm:max-w-[420px]">
+          {title}
+        </span>
+        <ArrowRight
+          aria-hidden
+          className="size-3.5 shrink-0 text-white/60 transition-transform group-hover:translate-x-0.5 group-hover:text-white"
+        />
+      </Link>
+    </div>
+  );
+}
+
 function LandingBackdrop() {
   return (
     <div className="pointer-events-none absolute inset-0">

apps/web/features/landing/i18n/en.ts

@@ -19,6 +19,7 @@ export function createEnDict(allowSignup: boolean): LandingDict {
     downloadDesktop: "Download Desktop",
     worksWith: "Works with",
     imageAlt: "Multica board view \u2014 issues managed by humans and agents",
+    whatsNewLabel: "What\u2019s new",
   },
 
   features: {

apps/web/features/landing/i18n/types.ts

@@ -29,6 +29,7 @@ export type LandingDict = {
     downloadDesktop: string;
     worksWith: string;
     imageAlt: string;
+    whatsNewLabel: string;
   };
   features: {
     teammates: FeatureSection;

apps/web/features/landing/i18n/zh.ts

@@ -19,6 +19,7 @@ export function createZhDict(allowSignup: boolean): LandingDict {
     downloadDesktop: "下载桌面端",
     worksWith: "支持",
     imageAlt: "Multica \u770b\u677f\u89c6\u56fe\u2014\u2014\u4eba\u7c7b\u548c 智能体 \u534f\u540c\u7ba1\u7406\u4efb\u52a1",
+    whatsNewLabel: "\u6700\u65b0\u66f4\u65b0",
   },
 
   features: {