feat(nostr-feed): Add submission detail view (Phase 4)

- Add SubmissionDetail.vue for full post view with content display
- Add SubmissionComment.vue for recursive threaded comments
- Add SubmissionDetailPage.vue route wrapper
- Add /submission/:id route to module
- Update SubmissionList share URL to use correct route
- Update test page to navigate to detail view on click
- Update plan document with Phase 4 completion

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

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

src/modules/nostr-feed/LINK_AGGREGATOR_PLAN.md

@@ -78,30 +78,37 @@ Transform the nostr-feed module into a Reddit-style link aggregator with support
 
 ## Implementation Phases
 
-### Phase 1: Core Data Model (Current)
+### Phase 1: Core Data Model
 - [x] Create feature branch
 - [x] Document plan
-- [ ] Create `types/submission.ts` - Type definitions
-- [ ] Create `SubmissionService.ts` - Submission CRUD
-- [ ] Create `LinkPreviewService.ts` - OG tag fetching
-- [ ] Extend `FeedService.ts` - Handle kind 1111
+- [x] Create `types/submission.ts` - Type definitions
+- [x] Create `SubmissionService.ts` - Submission CRUD
+- [x] Create `LinkPreviewService.ts` - OG tag fetching
+- [x] Extend `FeedService.ts` - Handle kind 1111
 
-### Phase 2: Post Creation
+### Phase 2: Post Creation (Pending)
 - [ ] Create `SubmitComposer.vue` - Multi-type composer
 - [ ] Add link preview on URL paste
 - [ ] Integrate with pictrs for media upload
 - [ ] Add NSFW toggle
 
 ### Phase 3: Feed Display
-- [ ] Create `SubmissionCard.vue` - Link aggregator card
-- [ ] Create `VoteButtons.vue` - Up/down voting
-- [ ] Add feed sorting (hot, new, top, controversial)
-- [ ] Add score calculation
+- [x] Create `SubmissionRow.vue` - Link aggregator row (Reddit/Lemmy style)
+- [x] Create `VoteControls.vue` - Up/down voting
+- [x] Create `SortTabs.vue` - Sort tabs (hot, new, top, controversial)
+- [x] Create `SubmissionList.vue` - Main feed container
+- [x] Create `SubmissionThumbnail.vue` - Thumbnail display
+- [x] Add feed sorting (hot, new, top, controversial)
+- [x] Add score calculation
+- [x] Create `LinkAggregatorTest.vue` - Test page with mock data & live mode
 
 ### Phase 4: Detail View
-- [ ] Create `SubmissionDetail.vue` - Full post view
-- [ ] Integrate `ThreadedPost.vue` for comments
-- [ ] Add comment sorting
+- [x] Create `SubmissionDetail.vue` - Full post view with content display
+- [x] Create `SubmissionComment.vue` - Recursive threaded comments
+- [x] Create `SubmissionDetailPage.vue` - Route page wrapper
+- [x] Add route `/submission/:id` for detail view
+- [ ] Add comment sorting (pending)
+- [ ] Integrate comment submission (pending)
 
 ### Phase 5: Communities (Future)
 - [ ] Create `CommunityService.ts`

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

@@ -0,0 +1,206 @@
+<script setup lang="ts">
+/**
+ * SubmissionComment - Recursive comment component for submission threads
+ * Displays a single comment with vote controls and nested replies
+ */
+
+import { computed } from 'vue'
+import { formatDistanceToNow } from 'date-fns'
+import { ChevronUp, ChevronDown, Reply, Flag, MoreHorizontal } from 'lucide-vue-next'
+import VoteControls from './VoteControls.vue'
+import type { SubmissionComment as CommentType } from '../types/submission'
+
+interface Props {
+  comment: CommentType
+  depth: number
+  collapsedComments: Set<string>
+  getDisplayName: (pubkey: string) => string
+  isAuthenticated: boolean
+  currentUserPubkey?: string | null
+}
+
+interface Emits {
+  (e: 'toggle-collapse', commentId: string): void
+  (e: 'reply', comment: CommentType): void
+  (e: 'upvote', comment: CommentType): void
+  (e: 'downvote', comment: CommentType): void
+}
+
+const props = defineProps<Props>()
+const emit = defineEmits<Emits>()
+
+// Is this comment collapsed
+const isCollapsed = computed(() => props.collapsedComments.has(props.comment.id))
+
+// Has replies
+const hasReplies = computed(() => props.comment.replies && props.comment.replies.length > 0)
+
+// Count total nested replies
+const replyCount = computed(() => {
+  const count = (c: CommentType): number => {
+    let total = c.replies?.length || 0
+    c.replies?.forEach(r => { total += count(r) })
+    return total
+  }
+  return count(props.comment)
+})
+
+// Format time
+function formatTime(timestamp: number): string {
+  return formatDistanceToNow(timestamp * 1000, { addSuffix: true })
+}
+
+// Depth colors for threading lines
+const depthColors = [
+  'border-blue-400',
+  'border-green-400',
+  'border-yellow-400',
+  'border-red-400',
+  'border-purple-400',
+  'border-pink-400',
+  'border-orange-400',
+  'border-cyan-400'
+]
+
+const borderColor = computed(() => depthColors[props.depth % depthColors.length])
+
+// Is own comment
+const isOwnComment = computed(() =>
+  props.currentUserPubkey && props.currentUserPubkey === props.comment.pubkey
+)
+</script>
+
+<template>
+  <div
+    :class="[
+      'relative',
+      depth > 0 ? 'ml-3' : ''
+    ]"
+  >
+    <!-- Threading line -->
+    <div
+      v-if="depth > 0"
+      :class="[
+        'absolute left-0 top-0 bottom-0 w-0.5',
+        borderColor,
+        'hover:w-1 transition-all cursor-pointer'
+      ]"
+      @click="emit('toggle-collapse', comment.id)"
+    />
+
+    <!-- Comment content -->
+    <div
+      :class="[
+        'py-2',
+        depth > 0 ? 'pl-3' : '',
+        'hover:bg-accent/20 transition-colors'
+      ]"
+    >
+      <!-- Header row -->
+      <div class="flex items-center gap-2 text-xs">
+        <!-- Collapse toggle -->
+        <button
+          v-if="hasReplies"
+          class="text-muted-foreground hover:text-foreground"
+          @click="emit('toggle-collapse', comment.id)"
+        >
+          <ChevronDown v-if="!isCollapsed" class="h-3.5 w-3.5" />
+          <ChevronUp v-else class="h-3.5 w-3.5" />
+        </button>
+        <div v-else class="w-3.5" />
+
+        <!-- Author -->
+        <span class="font-medium hover:underline cursor-pointer">
+          {{ getDisplayName(comment.pubkey) }}
+        </span>
+
+        <!-- Score -->
+        <span class="text-muted-foreground">
+          {{ comment.votes.score }} {{ comment.votes.score === 1 ? 'point' : 'points' }}
+        </span>
+
+        <!-- Time -->
+        <span class="text-muted-foreground">
+          {{ formatTime(comment.created_at) }}
+        </span>
+
+        <!-- Collapsed indicator -->
+        <span v-if="isCollapsed && hasReplies" class="text-muted-foreground">
+          ({{ replyCount }} {{ replyCount === 1 ? 'child' : 'children' }})
+        </span>
+      </div>
+
+      <!-- Content (hidden when collapsed) -->
+      <div v-if="!isCollapsed">
+        <!-- Comment body -->
+        <div class="mt-1 text-sm whitespace-pre-wrap leading-relaxed pl-5">
+          {{ comment.content }}
+        </div>
+
+        <!-- Actions -->
+        <div class="flex items-center gap-1 mt-1 pl-5">
+          <!-- Vote buttons (inline style) -->
+          <button
+            class="p-1 text-muted-foreground hover:text-orange-500 transition-colors"
+            :class="{ 'text-orange-500': comment.votes.userVote === 'upvote' }"
+            :disabled="!isAuthenticated"
+            @click="emit('upvote', comment)"
+          >
+            <ChevronUp class="h-4 w-4" />
+          </button>
+          <button
+            class="p-1 text-muted-foreground hover:text-blue-500 transition-colors"
+            :class="{ 'text-blue-500': comment.votes.userVote === 'downvote' }"
+            :disabled="!isAuthenticated"
+            @click="emit('downvote', comment)"
+          >
+            <ChevronDown class="h-4 w-4" />
+          </button>
+
+          <!-- Reply -->
+          <button
+            class="flex items-center gap-1 px-2 py-1 text-xs text-muted-foreground hover:text-foreground hover:bg-accent rounded transition-colors"
+            @click="emit('reply', comment)"
+          >
+            <Reply class="h-3 w-3" />
+            <span>reply</span>
+          </button>
+
+          <!-- Report (not for own comments) -->
+          <button
+            v-if="!isOwnComment"
+            class="flex items-center gap-1 px-2 py-1 text-xs text-muted-foreground hover:text-foreground hover:bg-accent rounded transition-colors"
+          >
+            <Flag class="h-3 w-3" />
+            <span>report</span>
+          </button>
+
+          <!-- More options -->
+          <button
+            class="p-1 text-muted-foreground hover:text-foreground hover:bg-accent rounded transition-colors"
+          >
+            <MoreHorizontal class="h-3 w-3" />
+          </button>
+        </div>
+
+        <!-- Nested replies -->
+        <div v-if="hasReplies" class="mt-1">
+          <SubmissionComment
+            v-for="reply in comment.replies"
+            :key="reply.id"
+            :comment="reply"
+            :depth="depth + 1"
+            :collapsed-comments="collapsedComments"
+            :get-display-name="getDisplayName"
+            :is-authenticated="isAuthenticated"
+            :current-user-pubkey="currentUserPubkey"
+            @toggle-collapse="emit('toggle-collapse', $event)"
+            @reply="emit('reply', $event)"
+            @upvote="emit('upvote', $event)"
+            @downvote="emit('downvote', $event)"
+          />
+        </div>
+      </div>
+    </div>
+  </div>
+</template>

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

@@ -0,0 +1,464 @@
+<script setup lang="ts">
+/**
+ * SubmissionDetail - Full post view with comments
+ * Displays complete submission content and threaded comments
+ */
+
+import { ref, computed, onMounted, watch } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import { formatDistanceToNow } from 'date-fns'
+import {
+  ArrowLeft,
+  MessageSquare,
+  Share2,
+  Bookmark,
+  Flag,
+  ExternalLink,
+  Image as ImageIcon,
+  FileText,
+  Loader2,
+  ChevronUp,
+  ChevronDown,
+  Reply,
+  Send
+} from 'lucide-vue-next'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import VoteControls from './VoteControls.vue'
+import SubmissionCommentComponent from './SubmissionComment.vue'
+import { useSubmission, useSubmissions } from '../composables/useSubmissions'
+import { tryInjectService, SERVICE_TOKENS } from '@/core/di-container'
+import type { ProfileService } from '../services/ProfileService'
+import type {
+  SubmissionWithMeta,
+  SubmissionComment as SubmissionCommentType,
+  LinkSubmission,
+  MediaSubmission,
+  SelfSubmission
+} from '../types/submission'
+
+interface Props {
+  /** Submission ID to display */
+  submissionId: string
+}
+
+const props = defineProps<Props>()
+const router = useRouter()
+
+// Inject services
+const profileService = tryInjectService<ProfileService>(SERVICE_TOKENS.PROFILE_SERVICE)
+const authService = tryInjectService<any>(SERVICE_TOKENS.AUTH_SERVICE)
+
+// Use submission composable
+const { submission, comments, upvote, downvote } = useSubmission(props.submissionId)
+
+// Subscribe to fetch the submission if not already loaded
+const { subscribe, isLoading, error } = useSubmissions({ autoSubscribe: false })
+
+// Comment composer state
+const showComposer = ref(false)
+const replyingTo = ref<{ id: string; author: string } | null>(null)
+const commentText = ref('')
+const isSubmittingComment = ref(false)
+
+// Collapsed comments state
+const collapsedComments = ref(new Set<string>())
+
+// Auth state
+const isAuthenticated = computed(() => authService?.isAuthenticated?.value || false)
+const currentUserPubkey = computed(() => authService?.user?.value?.pubkey || null)
+
+// 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 `${pubkey.slice(0, 8)}...`
+}
+
+// Format timestamp
+function formatTime(timestamp: number): string {
+  return formatDistanceToNow(timestamp * 1000, { addSuffix: true })
+}
+
+// Extract domain from URL
+function extractDomain(url: string): string {
+  try {
+    return new URL(url).hostname.replace('www.', '')
+  } catch {
+    return url
+  }
+}
+
+// Cast submission to specific type
+const linkSubmission = computed(() =>
+  submission.value?.postType === 'link' ? submission.value as LinkSubmission : null
+)
+const mediaSubmission = computed(() =>
+  submission.value?.postType === 'media' ? submission.value as MediaSubmission : null
+)
+const selfSubmission = computed(() =>
+  submission.value?.postType === 'self' ? submission.value as SelfSubmission : null
+)
+
+// Community name
+const communityName = computed(() => {
+  if (!submission.value?.communityRef) return null
+  const parts = submission.value.communityRef.split(':')
+  return parts.length >= 3 ? parts.slice(2).join(':') : null
+})
+
+// Handle voting
+async function onUpvote() {
+  if (!isAuthenticated.value) return
+  try {
+    await upvote()
+  } catch (err) {
+    console.error('Failed to upvote:', err)
+  }
+}
+
+async function onDownvote() {
+  if (!isAuthenticated.value) return
+  try {
+    await downvote()
+  } catch (err) {
+    console.error('Failed to downvote:', err)
+  }
+}
+
+// Handle share
+function onShare() {
+  const url = window.location.href
+  navigator.clipboard?.writeText(url)
+  // TODO: Show toast
+}
+
+// Handle comment reply
+function startReply(comment?: SubmissionCommentType) {
+  if (comment) {
+    replyingTo.value = { id: comment.id, author: getDisplayName(comment.pubkey) }
+  } else {
+    replyingTo.value = null
+  }
+  showComposer.value = true
+  commentText.value = ''
+}
+
+function cancelReply() {
+  showComposer.value = false
+  replyingTo.value = null
+  commentText.value = ''
+}
+
+async function submitComment() {
+  if (!commentText.value.trim() || !isAuthenticated.value) return
+
+  isSubmittingComment.value = true
+  try {
+    // TODO: Implement comment submission via SubmissionService
+    console.log('Submit comment:', {
+      text: commentText.value,
+      parentId: replyingTo.value?.id || props.submissionId
+    })
+    cancelReply()
+  } catch (err) {
+    console.error('Failed to submit comment:', err)
+  } finally {
+    isSubmittingComment.value = false
+  }
+}
+
+// Toggle comment collapse
+function toggleCollapse(commentId: string) {
+  if (collapsedComments.value.has(commentId)) {
+    collapsedComments.value.delete(commentId)
+  } else {
+    collapsedComments.value.add(commentId)
+  }
+  // Trigger reactivity
+  collapsedComments.value = new Set(collapsedComments.value)
+}
+
+// Count total replies
+function countReplies(comment: SubmissionCommentType): number {
+  let count = comment.replies?.length || 0
+  comment.replies?.forEach(reply => {
+    count += countReplies(reply)
+  })
+  return count
+}
+
+// Go back
+function goBack() {
+  router.back()
+}
+
+// Subscribe on mount if submission not loaded
+onMounted(() => {
+  if (!submission.value) {
+    subscribe({ limit: 50 })
+  }
+})
+</script>
+
+<template>
+  <div class="min-h-screen bg-background">
+    <!-- Header -->
+    <header class="sticky top-0 z-40 bg-background/95 backdrop-blur border-b">
+      <div class="max-w-4xl mx-auto px-4 py-3">
+        <div class="flex items-center gap-3">
+          <Button variant="ghost" size="sm" @click="goBack" class="h-8 w-8 p-0">
+            <ArrowLeft class="h-4 w-4" />
+          </Button>
+          <div class="flex-1 min-w-0">
+            <h1 class="text-sm font-medium truncate">
+              {{ submission?.title || 'Loading...' }}
+            </h1>
+            <p v-if="communityName" class="text-xs text-muted-foreground">
+              {{ communityName }}
+            </p>
+          </div>
+        </div>
+      </div>
+    </header>
+
+    <!-- Loading state -->
+    <div v-if="isLoading && !submission" class="flex items-center justify-center py-16">
+      <Loader2 class="h-6 w-6 animate-spin text-muted-foreground" />
+      <span class="ml-2 text-sm text-muted-foreground">Loading submission...</span>
+    </div>
+
+    <!-- Error state -->
+    <div v-else-if="error" class="max-w-4xl mx-auto p-4">
+      <div class="text-center py-8">
+        <p class="text-sm text-destructive">{{ error }}</p>
+        <Button variant="outline" size="sm" class="mt-4" @click="goBack">
+          Go Back
+        </Button>
+      </div>
+    </div>
+
+    <!-- Submission content -->
+    <main v-else-if="submission" class="max-w-4xl mx-auto">
+      <article class="p-4 border-b">
+        <!-- Post header with votes -->
+        <div class="flex gap-3">
+          <!-- Vote controls -->
+          <VoteControls
+            :score="submission.votes.score"
+            :user-vote="submission.votes.userVote"
+            :disabled="!isAuthenticated"
+            @upvote="onUpvote"
+            @downvote="onDownvote"
+          />
+
+          <!-- Content -->
+          <div class="flex-1 min-w-0">
+            <!-- Title -->
+            <h1 class="text-xl font-semibold leading-tight mb-2">
+              {{ submission.title }}
+            </h1>
+
+            <!-- Badges -->
+            <div v-if="submission.nsfw || submission.flair" class="flex items-center gap-2 mb-2">
+              <Badge v-if="submission.nsfw" variant="destructive" class="text-xs">
+                NSFW
+              </Badge>
+              <Badge v-if="submission.flair" variant="secondary" class="text-xs">
+                {{ submission.flair }}
+              </Badge>
+            </div>
+
+            <!-- Metadata -->
+            <div class="text-sm text-muted-foreground mb-4">
+              <span>submitted {{ formatTime(submission.created_at) }}</span>
+              <span> by </span>
+              <span class="font-medium hover:underline cursor-pointer">
+                {{ getDisplayName(submission.pubkey) }}
+              </span>
+              <template v-if="communityName">
+                <span> to </span>
+                <span class="font-medium hover:underline cursor-pointer">{{ communityName }}</span>
+              </template>
+            </div>
+
+            <!-- Link post content -->
+            <div v-if="linkSubmission" class="mb-4">
+              <a
+                :href="linkSubmission.url"
+                target="_blank"
+                rel="noopener noreferrer"
+                class="block p-4 border rounded-lg hover:bg-accent/30 transition-colors group"
+              >
+                <div class="flex items-start gap-4">
+                  <!-- Preview image -->
+                  <div
+                    v-if="linkSubmission.preview?.image"
+                    class="flex-shrink-0 w-32 h-24 rounded overflow-hidden bg-muted"
+                  >
+                    <img
+                      :src="linkSubmission.preview.image"
+                      :alt="linkSubmission.preview.title || ''"
+                      class="w-full h-full object-cover"
+                    />
+                  </div>
+                  <div v-else class="flex-shrink-0 w-16 h-16 rounded bg-muted flex items-center justify-center">
+                    <ExternalLink class="h-6 w-6 text-muted-foreground" />
+                  </div>
+
+                  <!-- Preview content -->
+                  <div class="flex-1 min-w-0">
+                    <div class="flex items-center gap-2 text-xs text-muted-foreground mb-1">
+                      <ExternalLink class="h-3 w-3" />
+                      <span>{{ extractDomain(linkSubmission.url) }}</span>
+                    </div>
+                    <h3 v-if="linkSubmission.preview?.title" class="font-medium text-sm group-hover:underline">
+                      {{ linkSubmission.preview.title }}
+                    </h3>
+                    <p v-if="linkSubmission.preview?.description" class="text-xs text-muted-foreground mt-1 line-clamp-2">
+                      {{ linkSubmission.preview.description }}
+                    </p>
+                  </div>
+                </div>
+              </a>
+
+              <!-- Optional body -->
+              <div v-if="linkSubmission.body" class="mt-4 text-sm whitespace-pre-wrap">
+                {{ linkSubmission.body }}
+              </div>
+            </div>
+
+            <!-- Media post content -->
+            <div v-if="mediaSubmission" class="mb-4">
+              <div class="rounded-lg overflow-hidden bg-muted">
+                <img
+                  v-if="mediaSubmission.media.mimeType?.startsWith('image/')"
+                  :src="mediaSubmission.media.url"
+                  :alt="mediaSubmission.media.alt || ''"
+                  class="max-w-full max-h-[600px] mx-auto"
+                />
+                <video
+                  v-else-if="mediaSubmission.media.mimeType?.startsWith('video/')"
+                  :src="mediaSubmission.media.url"
+                  controls
+                  class="max-w-full max-h-[600px] mx-auto"
+                />
+                <div v-else class="p-8 flex flex-col items-center justify-center">
+                  <ImageIcon class="h-12 w-12 text-muted-foreground mb-2" />
+                  <a
+                    :href="mediaSubmission.media.url"
+                    target="_blank"
+                    class="text-sm text-primary hover:underline"
+                  >
+                    View media
+                  </a>
+                </div>
+              </div>
+
+              <!-- Caption -->
+              <div v-if="mediaSubmission.body" class="mt-4 text-sm whitespace-pre-wrap">
+                {{ mediaSubmission.body }}
+              </div>
+            </div>
+
+            <!-- Self post content -->
+            <div v-if="selfSubmission" class="mb-4">
+              <div class="text-sm whitespace-pre-wrap leading-relaxed">
+                {{ selfSubmission.body }}
+              </div>
+            </div>
+
+            <!-- Actions -->
+            <div class="flex items-center gap-4 text-sm text-muted-foreground">
+              <button
+                class="flex items-center gap-1.5 hover:text-foreground transition-colors"
+                @click="startReply()"
+              >
+                <MessageSquare class="h-4 w-4" />
+                <span>{{ submission.commentCount }} comments</span>
+              </button>
+              <button
+                class="flex items-center gap-1.5 hover:text-foreground transition-colors"
+                @click="onShare"
+              >
+                <Share2 class="h-4 w-4" />
+                <span>share</span>
+              </button>
+              <button class="flex items-center gap-1.5 hover:text-foreground transition-colors">
+                <Bookmark class="h-4 w-4" />
+                <span>save</span>
+              </button>
+              <button class="flex items-center gap-1.5 hover:text-foreground transition-colors">
+                <Flag class="h-4 w-4" />
+                <span>report</span>
+              </button>
+            </div>
+          </div>
+        </div>
+      </article>
+
+      <!-- Comment composer -->
+      <div v-if="showComposer || isAuthenticated" class="p-4 border-b">
+        <div v-if="replyingTo" class="text-xs text-muted-foreground mb-2">
+          Replying to {{ replyingTo.author }}
+          <button class="ml-2 text-primary hover:underline" @click="cancelReply">Cancel</button>
+        </div>
+        <div class="flex gap-2">
+          <textarea
+            v-model="commentText"
+            :placeholder="isAuthenticated ? 'Write a comment...' : 'Login to comment'"
+            :disabled="!isAuthenticated"
+            rows="3"
+            class="flex-1 px-3 py-2 text-sm border rounded-lg bg-background resize-none focus:outline-none focus:ring-2 focus:ring-primary"
+          />
+        </div>
+        <div class="flex justify-end mt-2">
+          <Button
+            size="sm"
+            :disabled="!commentText.trim() || isSubmittingComment || !isAuthenticated"
+            @click="submitComment"
+          >
+            <Loader2 v-if="isSubmittingComment" class="h-4 w-4 animate-spin mr-2" />
+            <Send v-else class="h-4 w-4 mr-2" />
+            Comment
+          </Button>
+        </div>
+      </div>
+
+      <!-- Comments section -->
+      <section class="divide-y divide-border">
+        <div v-if="comments.length === 0" class="p-8 text-center text-sm text-muted-foreground">
+          No comments yet. Be the first to comment!
+        </div>
+
+        <!-- Recursive comment rendering -->
+        <template v-for="comment in comments" :key="comment.id">
+          <SubmissionCommentComponent
+            :comment="comment"
+            :depth="0"
+            :collapsed-comments="collapsedComments"
+            :get-display-name="getDisplayName"
+            :is-authenticated="isAuthenticated"
+            :current-user-pubkey="currentUserPubkey"
+            @toggle-collapse="toggleCollapse"
+            @reply="startReply"
+          />
+        </template>
+      </section>
+    </main>
+
+    <!-- Not found state -->
+    <div v-else class="max-w-4xl mx-auto p-4">
+      <div class="text-center py-16">
+        <FileText class="h-12 w-12 text-muted-foreground mx-auto mb-4" />
+        <p class="text-sm text-muted-foreground">Submission not found</p>
+        <Button variant="outline" size="sm" class="mt-4" @click="goBack">
+          Go Back
+        </Button>
+      </div>
+    </div>
+  </div>
+</template>

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

@@ -120,7 +120,7 @@ function onSubmissionClick(submission: SubmissionWithMeta) {
 // Handle share
 function onShare(submission: SubmissionWithMeta) {
   // Copy link to clipboard or open share dialog
-  const url = `${window.location.origin}/post/${submission.id}`
+  const url = `${window.location.origin}/submission/${submission.id}`
   navigator.clipboard?.writeText(url)
   // TODO: Show toast notification
 }

src/modules/nostr-feed/index.ts

@@ -4,10 +4,12 @@ import { container, SERVICE_TOKENS } from '@/core/di-container'
 import NostrFeed from './components/NostrFeed.vue'
 import SubmissionList from './components/SubmissionList.vue'
 import SubmissionRow from './components/SubmissionRow.vue'
+import SubmissionDetail from './components/SubmissionDetail.vue'
+import SubmissionComment from './components/SubmissionComment.vue'
 import VoteControls from './components/VoteControls.vue'
 import SortTabs from './components/SortTabs.vue'
 import { useFeed } from './composables/useFeed'
-import { useSubmissions } from './composables/useSubmissions'
+import { useSubmissions, useSubmission } from './composables/useSubmissions'
 import { FeedService } from './services/FeedService'
 import { ProfileService } from './services/ProfileService'
 import { ReactionService } from './services/ReactionService'
@@ -23,6 +25,18 @@ export const nostrFeedModule: ModulePlugin = {
   version: '1.0.0',
   dependencies: ['base'],
 
+  routes: [
+    {
+      path: '/submission/:id',
+      name: 'submission-detail',
+      component: () => import('./views/SubmissionDetailPage.vue'),
+      meta: {
+        title: 'Submission',
+        requiresAuth: false
+      }
+    }
+  ],
+
   async install(app: App) {
     console.log('nostr-feed module: Starting installation...')
 
@@ -76,13 +90,16 @@ export const nostrFeedModule: ModulePlugin = {
     NostrFeed,
     SubmissionList,
     SubmissionRow,
+    SubmissionDetail,
+    SubmissionComment,
     VoteControls,
     SortTabs
   },
 
   composables: {
     useFeed,
-    useSubmissions
+    useSubmissions,
+    useSubmission
   }
 }
 

src/modules/nostr-feed/views/SubmissionDetailPage.vue

@@ -0,0 +1,18 @@
+<script setup lang="ts">
+/**
+ * SubmissionDetailPage - Page wrapper for submission detail view
+ * Extracts route params and passes to SubmissionDetail component
+ */
+
+import { computed } from 'vue'
+import { useRoute } from 'vue-router'
+import SubmissionDetail from '../components/SubmissionDetail.vue'
+
+const route = useRoute()
+
+const submissionId = computed(() => route.params.id as string)
+</script>
+
+<template>
+  <SubmissionDetail :submission-id="submissionId" />
+</template>

src/pages/LinkAggregatorTest.vue

@@ -321,6 +321,7 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted } from 'vue'
+import { useRouter } from 'vue-router'
 import { MessageSquare, Share2, Bookmark, EyeOff, Send, Loader2, ChevronDown, ChevronUp, Wifi, WifiOff } from 'lucide-vue-next'
 import { SimplePool, finalizeEvent, generateSecretKey, getPublicKey, type Event as NostrEvent } from 'nostr-tools'
 import { bytesToHex, hexToBytes } from '@noble/hashes/utils'
@@ -331,6 +332,8 @@ import SubmissionThumbnail from '@/modules/nostr-feed/components/SubmissionThumb
 import { tryInjectService, SERVICE_TOKENS } from '@/core/di-container'
 import type { SortType, TimeRange, VoteType } from '@/modules/nostr-feed/types/submission'
 
+const router = useRouter()
+
 // View mode
 const viewMode = ref<'submissions' | 'mock'>('mock')
 
@@ -710,6 +713,6 @@ function onMockDownvote(submission: MockSubmission) {
 // Real submission click handler
 function onSubmissionClick(submission: any) {
   console.log('Clicked submission:', submission)
-  // TODO: Navigate to detail view
+  router.push({ name: 'submission-detail', params: { id: submission.id } })
 }
 </script>