feat(reader): Read entry points — TagCard icon, TagsView route, SeriesManageView button

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

frontend/src/views/SeriesManageView.vue

@@ -3,6 +3,13 @@
     <div class="fc-series__head">
       <span class="fc-series__name">{{ store.series?.name || 'Series' }}</span>
       <span class="fc-series__count">{{ store.pages.length }} page(s)</span>
+      <v-btn
+        v-if="store.pages.length > 0"
+        size="small" variant="tonal" color="accent"
+        prepend-icon="mdi-book-open"
+        class="fc-series__read"
+        @click="$router.push({ name: 'series-read', params: { tagId: store.tagId } })"
+      >Read</v-btn>
     </div>
 
     <div class="fc-series__body">

frontend/src/views/TagsView.vue

@@ -26,7 +26,7 @@
     <div class="fc-tags__grid">
       <TagCard
         v-for="c in store.cards" :key="c.id" :card="c"
-        @open="openTag" @rename="onRename" @manage="onManage"
+        @open="openTag" @rename="onRename" @manage="onManage" @read="onRead"
       />
     </div>
 
@@ -101,6 +101,10 @@ function openTag(tagId) {
 function onManage(id) {
   router.push({ name: 'series-manage', params: { tagId: id } })
 }
+
+function onRead(id) {
+  router.push({ name: 'series-read', params: { tagId: id } })
+}
 </script>
 
 <style scoped>