fix(nostr-feed): Fetch profiles for submission authors

Add watchers to fetch profiles when submissions and comments load,
ensuring display names are shown instead of pubkeys.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/modules/nostr-feed/components/SubmissionDetail.vue

@@ -4,7 +4,7 @@
  * Displays complete submission content and threaded comments
  */
 
-import { ref, computed } from 'vue'
+import { ref, computed, watch } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { formatDistanceToNow } from 'date-fns'
 import {
@@ -85,9 +85,7 @@ const currentUserPubkey = computed(() => authService?.user?.value?.pubkey || nul
 // Get display name for a pubkey
 function getDisplayName(pubkey: string): string {
   if (profileService) {
-    const profile = profileService.getProfile(pubkey)
-    if (profile?.display_name) return profile.display_name
-    if (profile?.name) return profile.name
+    return profileService.getDisplayName(pubkey)
   }
   return `${pubkey.slice(0, 8)}...`
 }
@@ -203,7 +201,7 @@ async function submitComment() {
     await submissionService.createComment(
       props.submissionId,
       commentText.value.trim(),
-      null // Top-level comment
+      undefined // Top-level comment
     )
     cancelReply()
   } catch (err: any) {
@@ -260,6 +258,33 @@ function countReplies(comment: SubmissionCommentType): number {
 function goBack() {
   router.back()
 }
+
+// Helper to collect all pubkeys from comments recursively
+function collectCommentPubkeys(comments: SubmissionCommentType[]): string[] {
+  const pubkeys: string[] = []
+  for (const comment of comments) {
+    pubkeys.push(comment.pubkey)
+    if (comment.replies?.length) {
+      pubkeys.push(...collectCommentPubkeys(comment.replies))
+    }
+  }
+  return pubkeys
+}
+
+// Fetch profiles when submission loads
+watch(submission, (sub) => {
+  if (profileService && sub) {
+    profileService.fetchProfiles([sub.pubkey])
+  }
+}, { immediate: true })
+
+// Fetch profiles when comments load
+watch(comments, (newComments) => {
+  if (profileService && newComments.length > 0) {
+    const pubkeys = [...new Set(collectCommentPubkeys(newComments))]
+    profileService.fetchProfiles(pubkeys)
+  }
+}, { immediate: true })
 </script>
 
 <template>

src/modules/nostr-feed/components/SubmissionList.vue

@@ -76,9 +76,7 @@ const isAuthenticated = computed(() => authService?.isAuthenticated?.value || fa
 // Get display name for a pubkey
 function getDisplayName(pubkey: string): string {
   if (profileService) {
-    const profile = profileService.getProfile(pubkey)
-    if (profile?.display_name) return profile.display_name
-    if (profile?.name) return profile.name
+    return profileService.getDisplayName(pubkey)
   }
   // Fallback to truncated pubkey
   return `${pubkey.slice(0, 8)}...`
@@ -143,6 +141,14 @@ function onReport(submission: SubmissionWithMeta) {
   console.log('Report:', submission.id)
 }
 
+// Fetch profiles when submissions change
+watch(submissions, (newSubmissions) => {
+  if (profileService && newSubmissions.length > 0) {
+    const pubkeys = [...new Set(newSubmissions.map(s => s.pubkey))]
+    profileService.fetchProfiles(pubkeys)
+  }
+}, { immediate: true })
+
 // Subscribe when community changes
 watch(() => props.community, () => {
   subscribe({