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/components/discovery/TagCard.vue

@@ -25,6 +25,11 @@
             icon="mdi-book-open-page-variant"
             title="Manage series" @click.stop="$emit('manage', card.id)"
           />
+          <v-icon
+            v-if="card.kind === 'series'"
+            class="fc-tagcard__edit" size="14" icon="mdi-book-open"
+            title="Read series" @click.stop="$emit('read', card.id)"
+          />
         </template>
         <v-text-field
           v-else
@@ -49,7 +54,7 @@
 import { ref } from 'vue'
 
 const props = defineProps({ card: { type: Object, required: true } })
-const emit = defineEmits(['open', 'rename', 'manage'])
+const emit = defineEmits(['open', 'rename', 'manage', 'read'])
 
 const editing = ref(false)
 const draft = ref('')