feat(frontend): inline tag rename, merge confirm dialog, TagsView wiring

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/views/TagsView.vue

@@ -25,7 +25,8 @@
 
     <div class="fc-tags__grid">
       <TagCard
-        v-for="c in store.cards" :key="c.id" :card="c" @open="openTag"
+        v-for="c in store.cards" :key="c.id" :card="c"
+        @open="openTag" @rename="onRename"
       />
     </div>
 
@@ -33,6 +34,13 @@
       <v-progress-circular indeterminate color="accent" size="28" />
     </div>
     <div v-else-if="store.hasMore" ref="sentinelEl" class="fc-tags__sentinel" />
+
+    <MergeConfirmDialog
+      :model-value="pendingMerge !== null"
+      :collision="pendingMerge"
+      @confirm="confirmMerge"
+      @cancel="pendingMerge = null"
+    />
   </v-container>
 </template>
 
@@ -41,6 +49,7 @@ import { ref, watch, onMounted, onUnmounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { useTagDirectoryStore } from '../stores/tagDirectory.js'
 import TagCard from '../components/discovery/TagCard.vue'
+import MergeConfirmDialog from '../components/discovery/MergeConfirmDialog.vue'
 
 const KINDS = ['artist', 'character', 'copyright', 'general', 'series', 'meta']
 const store = useTagDirectoryStore()
@@ -49,6 +58,18 @@ const router = useRouter()
 const search = ref('')
 const kind = ref(null)
 const sentinelEl = ref(null)
+const pendingMerge = ref(null)
+
+async function onRename({ id, name }) {
+  const res = await store.rename(id, name)
+  if (res.collision) pendingMerge.value = res.collision
+}
+
+async function confirmMerge() {
+  const c = pendingMerge.value
+  pendingMerge.value = null
+  if (c) await store.merge(c.sourceId, c.target.id)
+}
 
 let debounce = null
 watch(search, (v) => {