feat: releases 版本接口 + 全站仓库链接修正

- 后端 /api/releases/latest 代理 gitea Releases（10min 缓存，无发布/不可达时回退 SUNDYNIX_FALLBACK_VERSION）
- 前端 use-release hook 就绪（下载区动态接线暂缓）
- 仓库链接统一指向 git.sundynix.cn/sundynix/sundynix-agentix，下载按钮 # 占位改为 releases 页

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/components/layout/site-footer.tsx

@@ -15,7 +15,7 @@ const COLUMNS = [
     title: 'RESOURCES',
     links: [
       { label: '博客', href: '/blog', internal: true },
-      { label: 'GitHub', href: SITE.github },
+      { label: '源码仓库', href: SITE.repo },
       { label: 'RSS 订阅', href: '/rss.xml' },
     ],
   },

web/src/content/site.ts

@@ -1,9 +1,10 @@
 /** 站点文案与数据，改这里即可，不用动组件 */
 
 export const SITE = {
+  /** 静态回退版本号；线上以 /api/releases/latest 为准 */
   version: 'v0.1.2',
   tagline: '事件驱动的 AI Agent 工作台',
-  github: 'https://github.com/sundynix/agentix',
+  repo: 'https://git.sundynix.cn/sundynix/sundynix-agentix',
   icp: '滇ICP备2025056308号-1',
 }
 
@@ -118,21 +119,21 @@ export const DOWNLOADS = [
     os: 'macOS',
     meta: 'universal · .app · v0.1.2',
     action: '下载 .dmg',
-    href: '#',
+    href: `${SITE.repo}/releases`,
     highlight: true,
   },
   {
     os: 'Windows',
     meta: 'x64 · .exe · v0.1.2',
     action: '下载 .exe',
-    href: '#',
+    href: `${SITE.repo}/releases`,
     highlight: false,
   },
   {
     os: '自托管',
     meta: 'docker compose · 全平台',
     action: '部署文档',
-    href: '#',
+    href: SITE.repo,
     highlight: false,
   },
 ]

web/src/hooks/use-release.ts

@@ -0,0 +1,53 @@
+import { useEffect, useState } from 'react'
+import { SITE } from '@/content/site'
+
+export interface ReleaseInfo {
+  version: string
+  page_url: string
+  macos_url?: string
+  windows_url?: string
+  source: 'gitea' | 'fallback'
+}
+
+const STATIC_FALLBACK: ReleaseInfo = {
+  version: SITE.version,
+  page_url: `${SITE.repo}/releases`,
+  source: 'fallback',
+}
+
+// 模块级缓存：整个会话只请求一次，多处组件共享
+let cache: ReleaseInfo | null = null
+let inflight: Promise<ReleaseInfo> | null = null
+
+function load(): Promise<ReleaseInfo> {
+  if (cache) return Promise.resolve(cache)
+  inflight ??= fetch('/api/releases/latest')
+    .then(async (res) => {
+      const body = (await res.json()) as { code: number; data: ReleaseInfo }
+      if (!res.ok || body.code !== 0) throw new Error('release api failed')
+      cache = body.data
+      return cache
+    })
+    .catch(() => {
+      cache = STATIC_FALLBACK
+      return cache
+    })
+  return inflight
+}
+
+/** 最新版本信息；请求完成前先给静态回退值，避免闪空 */
+export function useRelease(): ReleaseInfo {
+  const [release, setRelease] = useState<ReleaseInfo>(cache ?? STATIC_FALLBACK)
+
+  useEffect(() => {
+    let cancelled = false
+    load().then((r) => {
+      if (!cancelled) setRelease(r)
+    })
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  return release
+}

web/src/pages/home/hero.tsx

@@ -40,7 +40,7 @@ export function Hero() {
             下载桌面版 <Download className="size-4" />
           </Link>
           <a
-            href={SITE.github}
+            href={SITE.repo}
             target="_blank"
             rel="noreferrer"
             className="inline-flex items-center rounded-lg border border-hairline-strong px-6 py-2.5 font-mono text-[14px] transition-colors hover:border-accent"

web/src/pages/home/quickstart.tsx

@@ -24,7 +24,7 @@ export function Quickstart() {
               <span className="text-white/35"># 内嵌 NATS，零配置体验</span>
               {'\n'}
               <span className="text-[#22d3ee]">$</span> git clone
-              https://github.com/sundynix/agentix{'\n'}
+              https://git.sundynix.cn/sundynix/sundynix-agentix{'\n'}
               <span className="text-[#22d3ee]">$</span> make demo{'\n'}
               {'\n'}
               <span className="text-white/35"># 或一条命令私有化部署</span>