fc3f: artistDirectory Pinia store — cursor scroll + q + platform filters

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

frontend/src/stores/artistDirectory.js

@@ -0,0 +1,57 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import { useApi } from '../composables/useApi.js'
+
+const PAGE = 60
+
+export const useArtistDirectoryStore = defineStore('artistDirectory', () => {
+  const api = useApi()
+  const cards = ref([])
+  const nextCursor = ref(null)
+  const loading = ref(false)
+  const error = ref(null)
+  const q = ref('')
+  const platform = ref(null)
+  let started = false
+
+  async function loadMore() {
+    if (loading.value) return
+    if (started && nextCursor.value === null) return
+    loading.value = true
+    error.value = null
+    try {
+      const params = { limit: PAGE }
+      if (q.value) params.q = q.value
+      if (platform.value) params.platform = platform.value
+      if (nextCursor.value) params.cursor = nextCursor.value
+      const body = await api.get('/api/artists/directory', { params })
+      cards.value.push(...body.cards)
+      nextCursor.value = body.next_cursor
+      started = true
+    } catch (e) {
+      error.value = e.message
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function reset() {
+    cards.value = []
+    nextCursor.value = null
+    started = false
+    await loadMore()
+  }
+
+  function setQuery(text) { q.value = text; reset() }
+  function setPlatform(p) { platform.value = p; reset() }
+
+  const hasMore = computed(() => !started || nextCursor.value !== null)
+  const isEmpty = computed(
+    () => !loading.value && cards.value.length === 0 && error.value === null
+  )
+
+  return {
+    cards, loading, error, q, platform, hasMore, isEmpty,
+    loadMore, reset, setQuery, setPlatform,
+  }
+})