feat(fc3c): /subscriptions Check Now button — wires SourceRow → store.checkNow

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

frontend/src/components/subscriptions/ArtistSection.vue

@@ -13,9 +13,11 @@
     <div v-if="open" class="fc-artist-section__body">
       <SourceRow
         v-for="s in sources" :key="s.id" :source="s"
+        :checking="checkingIds.has(s.id)"
         @edit="$emit('edit', $event)"
         @remove="$emit('remove', $event)"
         @toggle="$emit('toggle-source', $event)"
+        @check="$emit('check', $event)"
       />
       <v-btn
         size="small" variant="text" prepend-icon="mdi-plus"
@@ -34,8 +36,9 @@ const props = defineProps({
   artist: { type: Object, required: true },
   sources: { type: Array, required: true },
   open: { type: Boolean, default: false },
+  checkingIds: { type: Set, default: () => new Set() },
 })
-defineEmits(['toggle', 'edit', 'remove', 'toggle-source', 'add-source'])
+defineEmits(['toggle', 'edit', 'remove', 'toggle-source', 'add-source', 'check'])
 
 const latestChecked = computed(() => {
   const dates = props.sources.map(s => s.last_checked_at).filter(Boolean)

frontend/src/components/subscriptions/SourceRow.vue

@@ -11,14 +11,22 @@
       density="compact" hide-details color="accent"
       @update:model-value="onToggleEnabled"
     />
+    <v-btn
+      icon="mdi-play" size="x-small" variant="text"
+      :loading="checking"
+      @click="$emit('check', source)"
+    />
     <v-btn icon="mdi-pencil" size="x-small" variant="text" @click="$emit('edit', source)" />
     <v-btn icon="mdi-close" size="x-small" variant="text" @click="$emit('remove', source)" />
   </div>
 </template>
 
 <script setup>
-const props = defineProps({ source: { type: Object, required: true } })
-const emit = defineEmits(['edit', 'remove', 'toggle'])
+const props = defineProps({
+  source: { type: Object, required: true },
+  checking: { type: Boolean, default: false },
+})
+const emit = defineEmits(['edit', 'remove', 'toggle', 'check'])
 function onToggleEnabled(value) {
   emit('toggle', { source: props.source, enabled: value })
 }
@@ -27,7 +35,7 @@ function onToggleEnabled(value) {
 <style scoped>
 .fc-source-row {
   display: grid;
-  grid-template-columns: 96px 1fr auto auto auto;
+  grid-template-columns: 96px 1fr auto auto auto auto;
   gap: 0.75rem;
   align-items: center;
   padding: 0.4rem 0;