Site: downloads in the hero; hero links on one baseline, Source translated [skip ci]

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

site/src/text.ts

@@ -18,6 +18,7 @@ const en = {
   unsigned: "Not notarized. If macOS blocks the app, open System Settings › Privacy & Security and click Open Anyway.",
   get: "Download",
   count: "{n} downloads so far.",
+  source: "Source",
   other: "中文",
   roads: "Drag a file down the road.",
   fileDoc: "ElyDoc file",
@@ -55,6 +56,7 @@ const zh: typeof en = {
   unsigned: "未经公证。macOS 拦下应用时，打开“系统设置 › 隐私与安全性”，点“仍要打开”。",
   get: "前往下载",
   count: "已下载 {n} 次。",
+  source: "源码",
   other: "English",
   roads: "把文件沿着路拖过去。",
   fileDoc: "ElyDoc 文件",