feat(fc3c): downloads Pinia store + sources.checkNow action + vitests

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

frontend/src/stores/downloads.js

@@ -0,0 +1,72 @@
+import { defineStore } from 'pinia'
+import { ref } from 'vue'
+import { useApi } from '../composables/useApi.js'
+
+export const useDownloadsStore = defineStore('downloads', () => {
+  const api = useApi()
+
+  const events = ref([])
+  const cursor = ref(null)
+  const hasMore = ref(true)
+  const filter = ref({ status: null, source_id: null, artist_id: null })
+  const selected = ref(null)
+  const loading = ref(false)
+  const error = ref(null)
+
+  function _params(extra = {}) {
+    const out = { limit: 50, ...extra }
+    if (filter.value.status) out.status = filter.value.status
+    if (filter.value.source_id != null) out.source_id = filter.value.source_id
+    if (filter.value.artist_id != null) out.artist_id = filter.value.artist_id
+    return out
+  }
+
+  async function loadFirst() {
+    loading.value = true
+    error.value = null
+    try {
+      const body = await api.get('/api/downloads', { params: _params() })
+      events.value = body
+      cursor.value = body.length ? body[body.length - 1].id : null
+      hasMore.value = body.length === 50
+    } catch (e) {
+      error.value = e
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function loadMore() {
+    if (!hasMore.value || cursor.value == null) return
+    loading.value = true
+    try {
+      const body = await api.get('/api/downloads', { params: _params({ before: cursor.value }) })
+      events.value.push(...body)
+      cursor.value = body.length ? body[body.length - 1].id : cursor.value
+      hasMore.value = body.length === 50
+    } catch (e) {
+      error.value = e
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function loadOne(id) {
+    selected.value = await api.get(`/api/downloads/${id}`)
+    return selected.value
+  }
+
+  async function applyFilter(patch) {
+    filter.value = { ...filter.value, ...patch }
+    await loadFirst()
+  }
+
+  function closeDetail() {
+    selected.value = null
+  }
+
+  return {
+    events, cursor, hasMore, filter, selected, loading, error,
+    loadFirst, loadMore, loadOne, applyFilter, closeDetail,
+  }
+})

frontend/src/stores/sources.js

@@ -70,6 +70,20 @@ export const useSourcesStore = defineStore('sources', () => {
     return await api.get('/api/artists/autocomplete', { params: { q: query, limit } })
   }
 
+  // FC-3c: trigger a download for one source. Returns {download_event_id,status}.
+  const checkingIds = ref(new Set())
+
+  async function checkNow(id) {
+    checkingIds.value = new Set(checkingIds.value).add(id)
+    try {
+      return await api.post(`/api/sources/${id}/check`)
+    } finally {
+      const next = new Set(checkingIds.value)
+      next.delete(id)
+      checkingIds.value = next
+    }
+  }
+
   function sourcesByArtistGrouped() {
     // returns [{artist: {id,name,slug}, sources: [...]}, ...]
     const arr = byArtist.value.get(null) ?? []
@@ -92,8 +106,10 @@ export const useSourcesStore = defineStore('sources', () => {
   return {
     byArtist, loading, error,
     allSources,
+    checkingIds,
     loadAll, loadForArtist,
     create, update, remove,
+    checkNow,
     findOrCreateArtist, autocompleteArtist,
     sourcesByArtistGrouped,
   }