fix: avoid showing "No README is available" while README is loading

Author: akadotsh

app/pages/package/[[org]]/[name].vue

@@ -46,7 +46,7 @@ if (import.meta.server) {
 }
 
 // Fetch README for specific version if requested, otherwise latest
-const { data: readmeData } = useLazyFetch<ReadmeResponse>(
+const { data: readmeData, status: readmeStatus } = useLazyFetch<ReadmeResponse>(
   () => {
     const base = `/api/registry/readme/${packageName.value}`
     const version = resolvedVersion.value
@@ -1040,7 +1040,10 @@ const showSkeleton = shallowRef(false)
 
           <!-- eslint-disable vue/no-v-html -- HTML is sanitized server-side -->
           <Readme v-if="readmeData?.html" :html="readmeData.html" />
-          <p v-else class="text-fg-muted italic">
+          <p
+            v-else-if="readmeStatus === 'success' && !readmeData?.html"
+            class="text-fg-muted italic"
+          >
             {{ $t('package.readme.no_readme') }}
             <a
               v-if="repositoryUrl"