diff --git a/src/app.ts b/src/app.ts
index 459283e..ccfed43 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -63,6 +63,12 @@ export async function createAppInstance() {
         component: () => import('./pages/Login.vue'),
         meta: { requiresAuth: false }
       },
+      {
+        path: '/link-aggregator-test',
+        name: 'link-aggregator-test',
+        component: () => import('./pages/LinkAggregatorTest.vue'),
+        meta: { requiresAuth: false }
+      },
       // Pre-register module routes
       ...moduleRoutes
     ]
diff --git a/src/pages/LinkAggregatorTest.vue b/src/pages/LinkAggregatorTest.vue
new file mode 100644
index 0000000..1b45c5b
--- /dev/null
+++ b/src/pages/LinkAggregatorTest.vue
@@ -0,0 +1,715 @@
+<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 justify-between">
+          <div>
+            <h1 class="text-lg font-semibold">Link Aggregator Test</h1>
+            <p class="text-xs text-muted-foreground">Reddit/Lemmy-style feed UI</p>
+          </div>
+          <div class="flex items-center gap-2">
+            <!-- View toggle -->
+            <div class="flex items-center gap-1 text-sm">
+              <button
+                :class="[
+                  'px-2 py-1 rounded text-xs',
+                  viewMode === 'submissions' ? 'bg-primary text-primary-foreground' : 'text-muted-foreground hover:bg-accent'
+                ]"
+                @click="viewMode = 'submissions'"
+              >
+                Submissions
+              </button>
+              <button
+                :class="[
+                  'px-2 py-1 rounded text-xs',
+                  viewMode === 'mock' ? 'bg-primary text-primary-foreground' : 'text-muted-foreground hover:bg-accent'
+                ]"
+                @click="viewMode = 'mock'"
+              >
+                Mock Data
+              </button>
+            </div>
+          </div>
+        </div>
+      </div>
+    </header>
+
+    <!-- Main content -->
+    <main class="max-w-4xl mx-auto">
+      <!-- Test Relay Connection & Composer Panel -->
+      <div class="p-4 border-b">
+        <button
+          @click="showComposer = !showComposer"
+          class="flex items-center gap-2 text-sm font-medium w-full"
+        >
+          <component :is="showComposer ? ChevronUp : ChevronDown" class="h-4 w-4" />
+          Test Relay & Submission Composer
+          <span
+            :class="[
+              'ml-2 px-2 py-0.5 rounded text-xs',
+              isConnected ? 'bg-green-500/20 text-green-600' : 'bg-muted text-muted-foreground'
+            ]"
+          >
+            {{ isConnected ? 'Connected' : 'Disconnected' }}
+          </span>
+        </button>
+
+        <div v-if="showComposer" class="mt-4 space-y-4">
+          <!-- Relay connection -->
+          <div class="flex items-center gap-2">
+            <input
+              v-model="testRelayUrl"
+              type="text"
+              placeholder="Relay URL"
+              class="flex-1 px-3 py-2 text-sm border rounded-lg bg-background"
+              :disabled="isConnected"
+            />
+            <button
+              v-if="!isConnected"
+              @click="connectToRelay"
+              :disabled="isConnecting"
+              class="px-4 py-2 text-sm bg-primary text-primary-foreground rounded-lg hover:bg-primary/90 disabled:opacity-50 flex items-center gap-2"
+            >
+              <Loader2 v-if="isConnecting" class="h-4 w-4 animate-spin" />
+              <Wifi v-else class="h-4 w-4" />
+              {{ isConnecting ? 'Connecting...' : 'Connect' }}
+            </button>
+            <button
+              v-else
+              @click="disconnectFromRelay"
+              class="px-4 py-2 text-sm bg-destructive text-destructive-foreground rounded-lg hover:bg-destructive/90 flex items-center gap-2"
+            >
+              <WifiOff class="h-4 w-4" />
+              Disconnect
+            </button>
+          </div>
+
+          <div v-if="connectionError" class="text-sm text-destructive">
+            {{ connectionError }}
+          </div>
+
+          <div v-if="publicKey" class="text-xs text-muted-foreground">
+            Pubkey: {{ publicKey.slice(0, 16) }}...{{ publicKey.slice(-8) }}
+          </div>
+
+          <!-- Submission form (only when connected) -->
+          <div v-if="isConnected" class="border rounded-lg p-4 space-y-3">
+            <div class="flex gap-2">
+              <button
+                @click="postType = 'self'"
+                :class="[
+                  'px-3 py-1 text-sm rounded',
+                  postType === 'self' ? 'bg-primary text-primary-foreground' : 'bg-muted'
+                ]"
+              >
+                Self Post
+              </button>
+              <button
+                @click="postType = 'link'"
+                :class="[
+                  'px-3 py-1 text-sm rounded',
+                  postType === 'link' ? 'bg-primary text-primary-foreground' : 'bg-muted'
+                ]"
+              >
+                Link Post
+              </button>
+            </div>
+
+            <input
+              v-model="title"
+              type="text"
+              placeholder="Title"
+              class="w-full px-3 py-2 text-sm border rounded-lg bg-background"
+            />
+
+            <input
+              v-if="postType === 'link'"
+              v-model="url"
+              type="text"
+              placeholder="URL"
+              class="w-full px-3 py-2 text-sm border rounded-lg bg-background"
+            />
+
+            <textarea
+              v-model="content"
+              :placeholder="postType === 'self' ? 'Post content...' : 'Optional description...'"
+              rows="3"
+              class="w-full px-3 py-2 text-sm border rounded-lg bg-background resize-none"
+            />
+
+            <div class="flex items-center justify-between">
+              <button
+                @click="publishSubmission"
+                :disabled="isPublishing || !title"
+                class="px-4 py-2 text-sm bg-primary text-primary-foreground rounded-lg hover:bg-primary/90 disabled:opacity-50 flex items-center gap-2"
+              >
+                <Loader2 v-if="isPublishing" class="h-4 w-4 animate-spin" />
+                <Send v-else class="h-4 w-4" />
+                {{ isPublishing ? 'Publishing...' : 'Publish to Relay' }}
+              </button>
+
+              <div v-if="publishResult" :class="['text-sm', publishResult.success ? 'text-green-600' : 'text-destructive']">
+                {{ publishResult.message }}
+              </div>
+            </div>
+          </div>
+
+          <!-- Received events -->
+          <div v-if="isConnected && receivedEvents.length > 0" class="border rounded-lg p-4">
+            <h4 class="text-sm font-medium mb-2">Received Kind 1111 Events ({{ receivedEvents.length }})</h4>
+            <div class="space-y-2 max-h-48 overflow-y-auto">
+              <div
+                v-for="event in receivedEvents"
+                :key="event.id"
+                class="text-xs p-2 bg-muted rounded"
+              >
+                <div class="font-mono text-muted-foreground">{{ event.id.slice(0, 24) }}...</div>
+                <div class="font-medium mt-1">
+                  {{ event.tags.find(t => t[0] === 'title')?.[1] || '(no title)' }}
+                </div>
+                <div class="text-muted-foreground truncate">{{ event.content.slice(0, 100) }}</div>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <!-- Real submissions from Nostr -->
+      <div v-if="viewMode === 'submissions'" class="p-4">
+        <div class="mb-4 p-3 bg-muted/50 rounded-lg text-sm">
+          <p class="font-medium">Live Mode</p>
+          <p class="text-muted-foreground text-xs mt-1">
+            Fetching kind 1111 submissions from connected relays.
+            If empty, no submissions exist yet.
+          </p>
+        </div>
+        <SubmissionList
+          :show-ranks="showRanks"
+          :show-time-range="true"
+          initial-sort="hot"
+          @submission-click="onSubmissionClick"
+        />
+      </div>
+
+      <!-- Mock data demo -->
+      <div v-else class="p-4">
+        <div class="mb-4 p-3 bg-muted/50 rounded-lg text-sm">
+          <p class="font-medium">Mock Data Mode</p>
+          <p class="text-muted-foreground text-xs mt-1">
+            Displaying sample submissions to preview the UI.
+          </p>
+        </div>
+
+        <!-- Options -->
+        <div class="flex items-center gap-4 mb-4 text-sm">
+          <label class="flex items-center gap-2">
+            <input type="checkbox" v-model="showRanks" class="rounded" />
+            <span>Show ranks</span>
+          </label>
+        </div>
+
+        <!-- Sort tabs -->
+        <SortTabs
+          :current-sort="currentSort"
+          :current-time-range="currentTimeRange"
+          :show-time-range="true"
+          @update:sort="currentSort = $event"
+          @update:time-range="currentTimeRange = $event"
+        />
+
+        <!-- Mock submission rows -->
+        <div class="divide-y divide-border">
+          <div
+            v-for="(submission, index) in sortedMockSubmissions"
+            :key="submission.id"
+            class="flex items-start gap-2 py-2 px-1 hover:bg-accent/30 transition-colors group"
+          >
+            <!-- Rank -->
+            <div v-if="showRanks" class="w-6 text-right text-sm text-muted-foreground font-medium pt-1">
+              {{ index + 1 }}
+            </div>
+
+            <!-- Vote controls -->
+            <VoteControls
+              :score="submission.votes.score"
+              :user-vote="submission.votes.userVote"
+              @upvote="onMockUpvote(submission)"
+              @downvote="onMockDownvote(submission)"
+            />
+
+            <!-- Thumbnail -->
+            <SubmissionThumbnail
+              :src="submission.thumbnail"
+              :post-type="submission.postType"
+              :nsfw="submission.nsfw"
+              :size="70"
+            />
+
+            <!-- Content -->
+            <div class="flex-1 min-w-0">
+              <!-- Title row -->
+              <div class="flex items-start gap-2">
+                <h3 class="text-sm font-medium leading-snug cursor-pointer hover:underline">
+                  {{ submission.title }}
+                </h3>
+                <span v-if="submission.domain" class="text-xs text-muted-foreground flex-shrink-0">
+                  ({{ submission.domain }})
+                </span>
+                <span v-if="submission.postType === 'self'" class="text-xs text-muted-foreground flex-shrink-0">
+                  (self)
+                </span>
+              </div>
+
+              <!-- Badges -->
+              <div v-if="submission.nsfw || submission.flair" class="flex items-center gap-1 mt-0.5">
+                <span v-if="submission.nsfw" class="text-[10px] px-1 py-0 bg-destructive text-destructive-foreground rounded">
+                  NSFW
+                </span>
+                <span v-if="submission.flair" class="text-[10px] px-1 py-0 bg-secondary text-secondary-foreground rounded">
+                  {{ submission.flair }}
+                </span>
+              </div>
+
+              <!-- Metadata -->
+              <div class="text-xs text-muted-foreground mt-1">
+                <span>submitted {{ submission.timeAgo }}</span>
+                <span> by </span>
+                <span class="hover:underline cursor-pointer">{{ submission.author }}</span>
+                <template v-if="submission.community">
+                  <span> to </span>
+                  <span class="hover:underline cursor-pointer font-medium">{{ submission.community }}</span>
+                </template>
+              </div>
+
+              <!-- Actions -->
+              <div class="flex items-center gap-3 mt-1 text-xs text-muted-foreground">
+                <button class="flex items-center gap-1 hover:text-foreground">
+                  <MessageSquare class="h-3.5 w-3.5" />
+                  <span>{{ submission.commentCount }} comments</span>
+                </button>
+                <button class="flex items-center gap-1 hover:text-foreground opacity-0 group-hover:opacity-100">
+                  <Share2 class="h-3.5 w-3.5" />
+                  <span>share</span>
+                </button>
+                <button class="flex items-center gap-1 hover:text-foreground opacity-0 group-hover:opacity-100">
+                  <Bookmark class="h-3.5 w-3.5" />
+                  <span>save</span>
+                </button>
+                <button class="flex items-center gap-1 hover:text-foreground opacity-0 group-hover:opacity-100">
+                  <EyeOff class="h-3.5 w-3.5" />
+                  <span>hide</span>
+                </button>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+    </main>
+
+    <!-- Floating back button -->
+    <div class="fixed bottom-6 left-6">
+      <button
+        @click="$router.push('/')"
+        class="px-4 py-2 bg-primary text-primary-foreground rounded-full shadow-lg hover:shadow-xl transition-all text-sm font-medium"
+      >
+        Back to Feed
+      </button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted, onUnmounted } from 'vue'
+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'
+import SubmissionList from '@/modules/nostr-feed/components/SubmissionList.vue'
+import VoteControls from '@/modules/nostr-feed/components/VoteControls.vue'
+import SortTabs from '@/modules/nostr-feed/components/SortTabs.vue'
+import SubmissionThumbnail from '@/modules/nostr-feed/components/SubmissionThumbnail.vue'
+import { tryInjectService, SERVICE_TOKENS } from '@/core/di-container'
+import type { SortType, TimeRange, VoteType } from '@/modules/nostr-feed/types/submission'
+
+// View mode
+const viewMode = ref<'submissions' | 'mock'>('mock')
+
+// ===== Direct Relay Connection =====
+const testRelayUrl = ref('ws://localhost:5000/nostrrelay/test')
+const pool = new SimplePool()
+const isConnected = ref(false)
+const connectionError = ref<string | null>(null)
+const isConnecting = ref(false)
+
+// Composer state
+const showComposer = ref(true)
+const isPublishing = ref(false)
+const publishResult = ref<{ success: boolean; message: string } | null>(null)
+const receivedEvents = ref<NostrEvent[]>([])
+
+// Form state
+const postType = ref<'self' | 'link'>('self')
+const title = ref('Test submission from Link Aggregator')
+const content = ref('This is a test self post to verify kind 1111 submissions work correctly.')
+const url = ref('https://example.com/test-article')
+
+// Test keypair (generate new or use stored)
+const privateKey = ref<Uint8Array | null>(null)
+const publicKey = ref<string>('')
+
+// Try to get user's key from auth service, otherwise generate test key
+const authService = tryInjectService<any>(SERVICE_TOKENS.AUTH_SERVICE)
+
+function initKeys() {
+  // Try to use authenticated user's key
+  if (authService?.user?.value?.prvkey) {
+    try {
+      privateKey.value = hexToBytes(authService.user.value.prvkey)
+      publicKey.value = authService.user.value.pubkey
+      console.log('Using authenticated user key:', publicKey.value.slice(0, 16) + '...')
+      return
+    } catch (e) {
+      console.warn('Failed to use auth key:', e)
+    }
+  }
+
+  // Generate test keypair
+  const stored = localStorage.getItem('test_nostr_privkey')
+  if (stored) {
+    try {
+      privateKey.value = hexToBytes(stored)
+      publicKey.value = getPublicKey(privateKey.value)
+      console.log('Using stored test key:', publicKey.value.slice(0, 16) + '...')
+      return
+    } catch (e) {
+      console.warn('Failed to restore stored key:', e)
+    }
+  }
+
+  // Generate new
+  privateKey.value = generateSecretKey()
+  publicKey.value = getPublicKey(privateKey.value)
+  localStorage.setItem('test_nostr_privkey', bytesToHex(privateKey.value))
+  console.log('Generated new test key:', publicKey.value.slice(0, 16) + '...')
+}
+
+async function connectToRelay() {
+  isConnecting.value = true
+  connectionError.value = null
+
+  try {
+    await pool.ensureRelay(testRelayUrl.value)
+    isConnected.value = true
+    console.log('Connected to relay:', testRelayUrl.value)
+
+    // Subscribe to kind 1111 events
+    subscribeToSubmissions()
+  } catch (err: any) {
+    connectionError.value = err.message || 'Failed to connect'
+    isConnected.value = false
+    console.error('Connection error:', err)
+  } finally {
+    isConnecting.value = false
+  }
+}
+
+function disconnectFromRelay() {
+  pool.close([testRelayUrl.value])
+  isConnected.value = false
+  receivedEvents.value = []
+}
+
+let activeSub: any = null
+
+function subscribeToSubmissions() {
+  if (activeSub) {
+    activeSub.close()
+  }
+
+  receivedEvents.value = []
+
+  activeSub = pool.subscribeMany(
+    [testRelayUrl.value],
+    [{ kinds: [1111], limit: 50 }],
+    {
+      onevent(event: NostrEvent) {
+        console.log('Received event:', event)
+        // Add to beginning, avoid duplicates
+        if (!receivedEvents.value.find(e => e.id === event.id)) {
+          receivedEvents.value = [event, ...receivedEvents.value]
+        }
+      },
+      oneose() {
+        console.log('EOSE received')
+      }
+    }
+  )
+}
+
+async function publishSubmission() {
+  if (!privateKey.value || !isConnected.value) {
+    publishResult.value = { success: false, message: 'Not connected or no key' }
+    return
+  }
+
+  isPublishing.value = true
+  publishResult.value = null
+
+  try {
+    // Build kind 1111 event
+    const tags: string[][] = [
+      ['title', title.value],
+      ['post-type', postType.value]
+    ]
+
+    let eventContent = ''
+
+    if (postType.value === 'link') {
+      tags.push(['r', url.value])
+      eventContent = content.value || `Link: ${url.value}`
+    } else {
+      eventContent = content.value
+    }
+
+    const eventTemplate = {
+      kind: 1111,
+      created_at: Math.floor(Date.now() / 1000),
+      tags,
+      content: eventContent
+    }
+
+    const signedEvent = finalizeEvent(eventTemplate, privateKey.value)
+    console.log('Publishing event:', signedEvent)
+
+    // Publish
+    await Promise.any(pool.publish([testRelayUrl.value], signedEvent))
+
+    publishResult.value = {
+      success: true,
+      message: `Published! Event ID: ${signedEvent.id.slice(0, 16)}...`
+    }
+
+    // Refresh subscription
+    subscribeToSubmissions()
+
+  } catch (err: any) {
+    console.error('Publish error:', err)
+    publishResult.value = {
+      success: false,
+      message: err.message || 'Failed to publish'
+    }
+  } finally {
+    isPublishing.value = false
+  }
+}
+
+onMounted(() => {
+  initKeys()
+})
+
+onUnmounted(() => {
+  if (activeSub) activeSub.close()
+  pool.close([testRelayUrl.value])
+})
+
+// UI options
+const showRanks = ref(true)
+const currentSort = ref<SortType>('hot')
+const currentTimeRange = ref<TimeRange>('day')
+
+// Mock submission type
+interface MockSubmission {
+  id: string
+  title: string
+  postType: 'link' | 'media' | 'self'
+  domain?: string
+  thumbnail?: string
+  author: string
+  community?: string
+  timeAgo: string
+  commentCount: number
+  votes: {
+    score: number
+    upvotes: number
+    downvotes: number
+    userVote: VoteType
+  }
+  nsfw?: boolean
+  flair?: string
+  created_at: number
+}
+
+// Mock data
+const mockSubmissions = ref<MockSubmission[]>([
+  {
+    id: '1',
+    title: 'What are some cool and obscure data structures you know of?',
+    postType: 'self',
+    author: 'lil_shi',
+    community: 'Programming',
+    timeAgo: '10 hours ago',
+    commentCount: 29,
+    votes: { score: 84, upvotes: 92, downvotes: 8, userVote: null },
+    created_at: Date.now() / 1000 - 36000
+  },
+  {
+    id: '2',
+    title: "I haven't written code at all these holidays",
+    postType: 'self',
+    author: 'Matty_r',
+    community: 'Programming',
+    timeAgo: '1 day ago',
+    commentCount: 25,
+    votes: { score: 77, upvotes: 85, downvotes: 8, userVote: null },
+    created_at: Date.now() / 1000 - 86400
+  },
+  {
+    id: '3',
+    title: 'HDMI monitor for headless linux server',
+    postType: 'link',
+    domain: 'ttrp.network',
+    author: 'AldinTheMage',
+    community: 'Linux',
+    timeAgo: '19 hours ago',
+    commentCount: 19,
+    votes: { score: 28, upvotes: 32, downvotes: 4, userVote: null },
+    created_at: Date.now() / 1000 - 68400
+  },
+  {
+    id: '4',
+    title: '2026 is THE year of the linux desktop',
+    postType: 'self',
+    author: 'cm0002',
+    community: 'Linux',
+    timeAgo: '9 hours ago',
+    commentCount: 20,
+    votes: { score: 57, upvotes: 65, downvotes: 8, userVote: null },
+    flair: 'Discussion',
+    created_at: Date.now() / 1000 - 32400
+  },
+  {
+    id: '5',
+    title: 'NTFSPlus Becomes "NTFS" as Driver Moves Closer to Kernel Integration',
+    postType: 'link',
+    domain: 'itsfoss.com',
+    thumbnail: 'https://picsum.photos/seed/ntfs/200',
+    author: 'cm0002',
+    community: 'Linux',
+    timeAgo: '1 hour ago',
+    commentCount: 0,
+    votes: { score: 32, upvotes: 35, downvotes: 3, userVote: null },
+    flair: 'News',
+    created_at: Date.now() / 1000 - 3600
+  },
+  {
+    id: '6',
+    title: 'ReactOS Starts 2026 With Another "Major Step" Toward Windows NT6 Compatibility',
+    postType: 'link',
+    domain: 'phoronix.com',
+    thumbnail: 'https://picsum.photos/seed/reactos/200',
+    author: 'cm0002',
+    community: 'Linux',
+    timeAgo: '49 minutes ago',
+    commentCount: 0,
+    votes: { score: 15, upvotes: 17, downvotes: 2, userVote: null },
+    created_at: Date.now() / 1000 - 2940
+  },
+  {
+    id: '7',
+    title: 'Check out this mass adoption happening at a Bitcoin meetup',
+    postType: 'media',
+    thumbnail: 'https://picsum.photos/seed/bitcoin/200',
+    author: 'satoshi_fan',
+    community: 'Bitcoin',
+    timeAgo: '3 hours ago',
+    commentCount: 42,
+    votes: { score: 156, upvotes: 180, downvotes: 24, userVote: null },
+    created_at: Date.now() / 1000 - 10800
+  },
+  {
+    id: '8',
+    title: 'NSFW content should be behind a toggle [Meta Discussion]',
+    postType: 'self',
+    author: 'moderator_joe',
+    community: 'Meta',
+    timeAgo: '2 days ago',
+    commentCount: 89,
+    votes: { score: 234, upvotes: 290, downvotes: 56, userVote: null },
+    nsfw: true,
+    created_at: Date.now() / 1000 - 172800
+  }
+])
+
+// Sort mock submissions
+const sortedMockSubmissions = computed(() => {
+  const sorted = [...mockSubmissions.value]
+
+  switch (currentSort.value) {
+    case 'new':
+      return sorted.sort((a, b) => b.created_at - a.created_at)
+    case 'top':
+      return sorted.sort((a, b) => b.votes.score - a.votes.score)
+    case 'controversial':
+      // Balance between up and down votes
+      const controversy = (s: MockSubmission) => {
+        const total = s.votes.upvotes + s.votes.downvotes
+        if (total === 0) return 0
+        const balance = Math.min(s.votes.upvotes, s.votes.downvotes) / Math.max(s.votes.upvotes, s.votes.downvotes)
+        return Math.pow(total, 0.8) * balance
+      }
+      return sorted.sort((a, b) => controversy(b) - controversy(a))
+    case 'hot':
+    default:
+      // Hot rank: score + recency
+      const hotRank = (s: MockSubmission) => {
+        const order = Math.log10(Math.max(Math.abs(s.votes.score), 1))
+        const sign = s.votes.score > 0 ? 1 : s.votes.score < 0 ? -1 : 0
+        return sign * order + s.created_at / 45000
+      }
+      return sorted.sort((a, b) => hotRank(b) - hotRank(a))
+  }
+})
+
+// Mock vote handlers
+function onMockUpvote(submission: MockSubmission) {
+  if (submission.votes.userVote === 'upvote') {
+    // Remove upvote
+    submission.votes.score -= 1
+    submission.votes.upvotes -= 1
+    submission.votes.userVote = null
+  } else {
+    // Add upvote (remove downvote if exists)
+    if (submission.votes.userVote === 'downvote') {
+      submission.votes.score += 1
+      submission.votes.downvotes -= 1
+    }
+    submission.votes.score += 1
+    submission.votes.upvotes += 1
+    submission.votes.userVote = 'upvote'
+  }
+}
+
+function onMockDownvote(submission: MockSubmission) {
+  if (submission.votes.userVote === 'downvote') {
+    // Remove downvote
+    submission.votes.score += 1
+    submission.votes.downvotes -= 1
+    submission.votes.userVote = null
+  } else {
+    // Add downvote (remove upvote if exists)
+    if (submission.votes.userVote === 'upvote') {
+      submission.votes.score -= 1
+      submission.votes.upvotes -= 1
+    }
+    submission.votes.score -= 1
+    submission.votes.downvotes += 1
+    submission.votes.userVote = 'downvote'
+  }
+}
+
+// Real submission click handler
+function onSubmissionClick(submission: any) {
+  console.log('Clicked submission:', submission)
+  // TODO: Navigate to detail view
+}
+</script>