style(site): unify platform download badges

Give App Store and macOS downloads matching dimensions and two-line typography so platform choice stays clear without extra labels.

docs/assets/badges/macos-zh.svg

@@ -1,11 +1,11 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="120" height="40" viewBox="0 0 120 40" role="img" aria-labelledby="title">
-  <title id="title">&#30452;&#25509;&#19979;&#36733; macOS &#29256;</title>
-  <rect width="120" height="40" rx="7" fill="#000"/>
-  <rect x=".75" y=".75" width="118.5" height="38.5" rx="6.25" fill="none" stroke="#a6a6a6" stroke-width="1.5"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="144" height="40" viewBox="0 0 144 40" role="img" aria-labelledby="title">
+  <title id="title">&#31435;&#21363;&#19979;&#36733; macOS &#29256;&#26412;</title>
+  <rect width="144" height="40" rx="7" fill="#000"/>
+  <rect x=".75" y=".75" width="142.5" height="38.5" rx="6.25" fill="none" stroke="#a6a6a6" stroke-width="1.5"/>
   <g fill="none" stroke="#fff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.7">
     <rect x="10.5" y="8.5" width="22" height="15.5" rx="2"/>
     <path d="M17.5 29.5h8M21.5 24v5.5M17.5 20.5h8"/>
   </g>
-  <text x="40" y="14" fill="#fff" font-family="-apple-system, BlinkMacSystemFont, sans-serif" font-size="7.2">&#30452;&#25509;&#19979;&#36733;</text>
-  <text x="40" y="29" fill="#fff" font-family="-apple-system, BlinkMacSystemFont, sans-serif" font-size="15.5" font-weight="600">macOS &#29256;</text>
+  <text x="40" y="14" fill="#fff" font-family="-apple-system, BlinkMacSystemFont, sans-serif" font-size="7.2">&#31435;&#21363;&#19979;&#36733;</text>
+  <text x="40" y="29" fill="#fff" font-family="-apple-system, BlinkMacSystemFont, sans-serif" font-size="15.5" font-weight="600">macOS &#29256;&#26412;</text>
 </svg>