feat(ui): hidden-view review strip — flagged auto-hides with keep / un-hide (#141 step 5)

When "Show hidden" is on, a review strip appears atop the gallery listing the
auto-hidden chrome flagged "also looks like content" (most-concerning first):
thumbnail + "also looks like <X>" + Keep hidden / Un-hide. Un-hide removes the
presentation tag (image returns to the gallery) and trains the head; Keep
resolves the flag. Self-hides when there's nothing to review; theme-token styled.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM

frontend/src/components/gallery/HiddenReviewStrip.vue

@@ -0,0 +1,151 @@
+<template>
+  <!-- Shown atop the gallery when "Show hidden" is on: auto-hidden chrome that
+       ALSO looked like real content, most-concerning first, with keep / un-hide
+       (#141). Renders nothing when there's nothing to review. -->
+  <section v-if="items.length" class="fc-review" aria-label="Hidden images to review">
+    <div class="fc-review__head">
+      <v-icon size="18" color="warning">mdi-alert-outline</v-icon>
+      <span class="fc-review__title">
+        {{ items.length }} auto-hidden {{ items.length === 1 ? 'image' : 'images' }}
+        may be real content — review before they stay hidden
+      </span>
+    </div>
+    <div class="fc-review__cards">
+      <div
+        v-for="it in items" :key="keyOf(it)" class="fc-review-card"
+      >
+        <img
+          :src="it.thumbnail_url" :alt="it.tag_name"
+          class="fc-review-card__thumb" loading="lazy"
+        >
+        <div class="fc-review-card__body">
+          <div
+            class="fc-review-card__conflict"
+            :title="`Scored ${Math.round(it.conflict_score * 100)}% on “${it.conflict_name || 'a content tag'}”`"
+          >
+            also looks like <strong>{{ it.conflict_name || 'content' }}</strong>
+          </div>
+          <div class="fc-review-card__tag">hidden as {{ it.tag_name }}</div>
+          <div class="fc-review-card__acts">
+            <button
+              type="button" class="fc-review-btn fc-review-btn--keep"
+              :disabled="busy.includes(keyOf(it))" @click="resolve(it, 'keep')"
+            >Keep hidden</button>
+            <button
+              type="button" class="fc-review-btn fc-review-btn--unhide"
+              :disabled="busy.includes(keyOf(it))" @click="resolve(it, 'unhide')"
+            >Un-hide</button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </section>
+</template>
+
+<script setup>
+import { ref, watch } from 'vue'
+import { useApi } from '../../composables/useApi.js'
+import { useGalleryStore } from '../../stores/gallery.js'
+import { toast } from '../../utils/toast.js'
+
+const api = useApi()
+const store = useGalleryStore()
+
+const items = ref([])
+const busy = ref([])
+
+function keyOf(it) { return `${it.image_id}:${it.tag_id}` }
+
+async function load() {
+  if (!store.filter.include_hidden) { items.value = []; return }
+  try {
+    const body = await api.get('/api/gallery/hidden-review')
+    items.value = body.items || []
+  } catch { items.value = [] }
+}
+
+async function resolve(it, action) {
+  const k = keyOf(it)
+  busy.value = [...busy.value, k]
+  try {
+    await api.post(`/api/gallery/hidden-review/${it.image_id}/${it.tag_id}/${action}`)
+    items.value = items.value.filter((x) => keyOf(x) !== k)
+    if (action === 'unhide') {
+      toast({ text: `Un-hidden — “${it.tag_name}” removed; it'll train the head`, type: 'success' })
+    }
+  } catch (e) {
+    toast({
+      text: `Could not ${action === 'keep' ? 'keep hidden' : 'un-hide'}: ${e.message}`,
+      type: 'error',
+    })
+  } finally {
+    busy.value = busy.value.filter((x) => x !== k)
+  }
+}
+
+// Fetch whenever "Show hidden" flips on (immediate covers a mount already-on).
+watch(() => store.filter.include_hidden, load, { immediate: true })
+</script>
+
+<style scoped>
+.fc-review {
+  margin-bottom: 14px;
+  padding: 12px;
+  border: 1px solid rgb(var(--v-theme-warning), 0.4);
+  background: rgb(var(--v-theme-warning), 0.06);
+  border-radius: 8px;
+}
+.fc-review__head {
+  display: flex; align-items: center; gap: 8px; margin-bottom: 10px;
+}
+.fc-review__title {
+  font-size: 14px; font-weight: 600;
+  color: rgb(var(--v-theme-on-surface));
+}
+.fc-review__cards {
+  display: flex; gap: 10px; overflow-x: auto; padding-bottom: 4px;
+}
+.fc-review-card {
+  flex: 0 0 auto; width: 150px;
+  display: flex; flex-direction: column;
+  border: 1px solid rgb(var(--v-theme-surface-light));
+  border-radius: 6px; overflow: hidden;
+  background: rgb(var(--v-theme-surface));
+}
+.fc-review-card__thumb {
+  width: 100%; height: 96px; object-fit: cover; display: block;
+  background: rgb(var(--v-theme-surface-light));
+}
+.fc-review-card__body { padding: 6px 8px; }
+.fc-review-card__conflict {
+  font-size: 11px; color: rgb(var(--v-theme-on-surface));
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+.fc-review-card__conflict strong { color: rgb(var(--v-theme-warning)); }
+.fc-review-card__tag {
+  font-size: 10px; color: rgb(var(--v-theme-on-surface-variant));
+  margin: 1px 0 6px;
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+.fc-review-card__acts { display: flex; gap: 4px; }
+.fc-review-btn {
+  flex: 1; font-size: 11px; padding: 3px 4px; border-radius: 4px;
+  cursor: pointer; border: 1px solid transparent;
+}
+.fc-review-btn:disabled { opacity: 0.5; cursor: default; }
+.fc-review-btn--keep {
+  background: transparent;
+  color: rgb(var(--v-theme-on-surface-variant));
+  border-color: rgb(var(--v-theme-on-surface-variant), 0.4);
+}
+.fc-review-btn--keep:hover:not(:disabled) {
+  background: rgb(var(--v-theme-on-surface-variant), 0.1);
+}
+.fc-review-btn--unhide {
+  background: rgb(var(--v-theme-accent)); color: #fff;
+}
+.fc-review-btn--unhide:hover:not(:disabled) { opacity: 0.9; }
+.fc-review-btn:focus-visible {
+  outline: 2px solid rgb(var(--v-theme-accent)); outline-offset: 1px;
+}
+</style>

frontend/src/views/GalleryView.vue

@@ -13,6 +13,7 @@
       <div class="fc-gallery-layout__main">
         <PostInfoHeader />
         <GalleryFilterBar v-if="store.filter.post_id == null" />
+        <HiddenReviewStrip />
         <EmptyState v-if="store.isEmpty" />
         <GalleryGrid v-else @open="openImage" />
       </div>
@@ -33,6 +34,7 @@ import { useGalleryStore } from '../stores/gallery.js'
 import { useModalStore } from '../stores/modal.js'
 import GalleryGrid from '../components/gallery/GalleryGrid.vue'
 import GalleryFilterBar from '../components/gallery/GalleryFilterBar.vue'
+import HiddenReviewStrip from '../components/gallery/HiddenReviewStrip.vue'
 import TimelineSidebar from '../components/gallery/TimelineSidebar.vue'
 import EmptyState from '../components/gallery/EmptyState.vue'
 import PostInfoHeader from '../components/gallery/PostInfoHeader.vue'