fix: typography and avatar polish from copilot review

- Use a proper ellipsis character in the search placeholder
- Give maintainer avatars explicit width/height and lazy loading to
  prevent layout shift for non-critical images

Author: thonatos

apps/web/app/components/cnpm/MaintainersCard.tsx

@@ -26,7 +26,13 @@ function MaintainerRow({ maintainer }: { maintainer: Maintainer }) {
   return (
     <div className="flex items-center gap-2.5">
       <Avatar className="size-8">
-        <AvatarImage src={gravatarUrl(hash)} alt={maintainer.name} />
+        <AvatarImage
+          src={gravatarUrl(hash)}
+          alt={maintainer.name}
+          width={32}
+          height={32}
+          loading="lazy"
+        />
         <AvatarFallback>{initials(maintainer.name)}</AvatarFallback>
       </Avatar>
       <div className="min-w-0">

apps/web/app/components/cnpm/NpmSearchForm.tsx

@@ -49,7 +49,7 @@ export function NpmSearchForm({
           value={value}
           autoFocus={autoFocus}
           onChange={(event) => setValue(event.target.value)}
-          placeholder="搜索 npm 包，如 react、@babel/core..."
+          placeholder="搜索 npm 包，如 react、@babel/core…"
           aria-label="搜索 npm 包"
           className={cn("h-full", large && "text-base")}
         />