diff --git a/frontend/src/components/posts/PostModal.vue b/frontend/src/components/posts/PostModal.vue
new file mode 100644
index 0000000..3c25ccb
--- /dev/null
+++ b/frontend/src/components/posts/PostModal.vue
@@ -0,0 +1,211 @@
+<template>
+  <v-dialog
+    :model-value="store.isOpen"
+    max-width="1100"
+    scrollable
+    @update:model-value="(v) => { if (!v) close() }"
+  >
+    <v-card v-if="store.currentPost" class="fc-post-modal">
+      <div class="fc-post-modal__head">
+        <v-chip size="x-small" variant="tonal">{{ post.source.platform }}</v-chip>
+        <RouterLink
+          :to="{ name: 'artist', params: { slug: post.artist.slug } }"
+          class="fc-post-modal__artist"
+          @click="close"
+        >{{ post.artist.name }}</RouterLink>
+        <span class="fc-post-modal__date" :title="absoluteDate">
+          {{ relativeDate }}
+        </span>
+        <span v-if="post.thumbnails?.length" class="fc-post-modal__meta">
+          · {{ post.thumbnails.length }} image{{ post.thumbnails.length === 1 ? '' : 's' }}
+        </span>
+        <span v-if="post.attachments?.length" class="fc-post-modal__meta">
+          · {{ post.attachments.length }} attachment{{ post.attachments.length === 1 ? '' : 's' }}
+        </span>
+        <v-spacer />
+        <v-btn
+          v-if="post.post_url"
+          :href="post.post_url" target="_blank" rel="noopener"
+          icon="mdi-open-in-new" size="small" variant="text"
+          :aria-label="`open original post on ${post.source.platform}`"
+        />
+        <v-btn
+          icon="mdi-close" size="small" variant="text"
+          aria-label="Close"
+          @click="close"
+        />
+      </div>
+
+      <v-card-text class="fc-post-modal__body">
+        <section v-if="post.thumbnails?.length" class="fc-post-modal__sec">
+          <PostImageGrid :thumbnails="post.thumbnails" />
+          <div v-if="!store.detailLoaded" class="fc-post-modal__loading-hint">
+            Loading full image list…
+          </div>
+        </section>
+
+        <section v-if="post.post_title" class="fc-post-modal__sec">
+          <h2 class="fc-post-modal__title">{{ post.post_title }}</h2>
+        </section>
+
+        <section v-if="descriptionHtml" class="fc-post-modal__sec">
+          <div class="fc-post-modal__desc" v-html="descriptionHtml" />
+        </section>
+
+        <section v-if="post.attachments?.length" class="fc-post-modal__sec">
+          <h3 class="fc-post-modal__h3">Attachments</h3>
+          <div class="fc-post-modal__atts">
+            <a
+              v-for="att in post.attachments" :key="att.id"
+              :href="att.download_url" download
+              class="fc-post-modal__att"
+            >
+              <v-icon size="small" class="fc-post-modal__att-icon">mdi-paperclip</v-icon>
+              <span class="fc-post-modal__att-name">{{ att.original_filename }}</span>
+              <span class="fc-post-modal__att-size">({{ formatBytes(att.size_bytes) }})</span>
+            </a>
+          </div>
+        </section>
+      </v-card-text>
+    </v-card>
+  </v-dialog>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+import { RouterLink } from 'vue-router'
+
+import { usePostModalStore } from '../../stores/postModal.js'
+import { sanitizeHtml } from '../../utils/htmlSanitize.js'
+import PostImageGrid from './PostImageGrid.vue'
+
+const store = usePostModalStore()
+const post = computed(() => store.currentPost || {})
+
+const sortDateIso = computed(() => post.value.post_date || post.value.downloaded_at)
+const absoluteDate = computed(() => sortDateIso.value
+  ? new Date(sortDateIso.value).toLocaleString()
+  : '')
+const relativeDate = computed(() => {
+  if (!sortDateIso.value) return ''
+  const then = new Date(sortDateIso.value).getTime()
+  const diff = (Date.now() - then) / 1000
+  if (diff < 60) return `${Math.floor(diff)}s ago`
+  if (diff < 3600) return `${Math.floor(diff / 60)}m ago`
+  if (diff < 86400) return `${Math.floor(diff / 3600)}h ago`
+  if (diff < 86400 * 30) return `${Math.floor(diff / 86400)}d ago`
+  return new Date(sortDateIso.value).toLocaleDateString()
+})
+
+const descriptionHtml = computed(() => {
+  // Detail endpoint returns description_full as plain text (the
+  // existing service uses html_to_plain on the stored description).
+  // Render the plain text in <p> wrappers; the sanitizer below is
+  // defensive for the case where the backend ever switches to raw HTML.
+  const raw = post.value.description_full || post.value.description_plain
+  if (!raw) return ''
+  if (/[<>]/.test(raw)) return sanitizeHtml(raw)
+  const esc = raw
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+  return esc
+    .split(/\n\s*\n/)
+    .map(p => `<p>${p.replace(/\n/g, '<br>')}</p>`)
+    .join('')
+})
+
+function close () {
+  store.close()
+}
+
+function formatBytes (n) {
+  if (!n) return '0 B'
+  if (n < 1024) return `${n} B`
+  if (n < 1024 * 1024) return `${(n / 1024).toFixed(1)} KB`
+  if (n < 1024 * 1024 * 1024) return `${(n / 1024 / 1024).toFixed(1)} MB`
+  return `${(n / 1024 / 1024 / 1024).toFixed(1)} GB`
+}
+</script>
+
+<style scoped>
+.fc-post-modal {
+  background: rgb(var(--v-theme-surface));
+  max-height: 90vh;
+  display: flex;
+  flex-direction: column;
+}
+.fc-post-modal__head {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 12px 16px;
+  font-size: 0.85rem;
+  color: rgb(var(--v-theme-on-surface-variant));
+  border-bottom: 1px solid rgb(var(--v-theme-on-surface-variant) / 0.15);
+}
+.fc-post-modal__artist {
+  color: rgb(var(--v-theme-on-surface));
+  text-decoration: none;
+  font-weight: 600;
+}
+.fc-post-modal__artist:hover { color: rgb(var(--v-theme-accent)); }
+.fc-post-modal__date { white-space: nowrap; }
+.fc-post-modal__meta { white-space: nowrap; }
+.fc-post-modal__body {
+  padding: 16px;
+  overflow-y: auto;
+  flex: 1 1 auto;
+}
+.fc-post-modal__sec {
+  margin-bottom: 24px;
+}
+.fc-post-modal__sec:last-child { margin-bottom: 0; }
+.fc-post-modal__title {
+  font-family: 'Fraunces', Georgia, serif;
+  font-size: 24px;
+  font-weight: 500;
+  margin: 0;
+  color: rgb(var(--v-theme-on-surface));
+}
+.fc-post-modal__h3 {
+  font-family: 'Fraunces', Georgia, serif;
+  font-size: 16px;
+  font-weight: 500;
+  margin: 0 0 8px 0;
+  color: rgb(var(--v-theme-on-surface));
+}
+.fc-post-modal__desc {
+  font-size: 0.95rem;
+  line-height: 1.55;
+  color: rgb(var(--v-theme-on-surface));
+}
+.fc-post-modal__desc :deep(p) { margin: 0 0 12px 0; }
+.fc-post-modal__desc :deep(a) { color: rgb(var(--v-theme-accent)); }
+.fc-post-modal__loading-hint {
+  margin-top: 8px;
+  font-size: 0.8rem;
+  color: rgb(var(--v-theme-on-surface-variant));
+}
+.fc-post-modal__atts {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+.fc-post-modal__att {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 6px 12px;
+  border: 1px solid rgb(var(--v-theme-on-surface-variant));
+  border-radius: 999px;
+  color: rgb(var(--v-theme-on-surface));
+  text-decoration: none;
+  font-size: 0.85rem;
+}
+.fc-post-modal__att:hover {
+  color: rgb(var(--v-theme-accent));
+  border-color: rgb(var(--v-theme-accent));
+}
+.fc-post-modal__att-size { color: rgb(var(--v-theme-on-surface-variant)); }
+</style>