feat(ia): wave 3 — Subscriptions landing answers 'what needs me, what came in?'

Daily-use reorder of the Subscriptions tab: needs-attention strip first
(FailingSourcesCard moves up from below the Downloads fold — a broken
subscription was invisible unless you went looking), then a new Recent
arrivals card (real downloads only, no-change scans filtered out, artist
links), then the source list. Both cards render nothing when there's nothing
to say.

Retry logic moves into the downloads store (retrySource / retryAllFailing) so
the needs-attention card and the Downloads maintenance menu share one
implementation — single-retry forces past cooldown, bulk keeps cooldown
enforcement, same tally shape. The card's Logs button deep-links into the
Downloads tab pre-filtered (?source_id now watched, not just read on mount).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM

frontend/src/components/subscriptions/SubscriptionsTab.vue

@@ -2,6 +2,12 @@
   <div>
     <SchedulerStatusBar :status="store.scheduleStatus" class="fc-subs__sched" />
 
+    <!-- Daily-use ordering (2026-07-02): what needs me → what came in →
+         the full source list. Both cards render nothing when there's
+         nothing to say. -->
+    <NeedsAttentionCard />
+    <RecentArrivalsCard />
+
     <div class="fc-subs__bar">
       <v-btn color="accent" prepend-icon="mdi-plus" @click="openAddSource(null)">
         Add subscription
@@ -319,6 +325,8 @@ import { useRoute, useRouter } from 'vue-router'
 import { useSourcesStore } from '../../stores/sources.js'
 import { usePlatformsStore } from '../../stores/platforms.js'
 import { useImportStore } from '../../stores/import.js'
+import NeedsAttentionCard from './NeedsAttentionCard.vue'
+import RecentArrivalsCard from './RecentArrivalsCard.vue'
 import SourceRow from './SourceRow.vue'
 import SourceCard from './SourceCard.vue'
 import SourceHealthDot from './SourceHealthDot.vue'