feat: add playlists mvp for web and subsonic

apps/web/src/lib/api.ts

@@ -64,6 +64,21 @@ export type HomePayload = {
   artists: Artist[]
 }
 
+export type PlaylistSummary = {
+  id: string
+  name: string
+  comment: string
+  public: boolean
+  songCount: number
+  durationSeconds: number
+  createdAt: string
+  updatedAt: string
+}
+
+export type PlaylistDetail = PlaylistSummary & {
+  tracks: Track[]
+}
+
 const API_BASE = import.meta.env.VITE_API_BASE ?? 'http://localhost:4040'
 
 async function request<T>(path: string, init?: RequestInit): Promise<T> {
@@ -81,6 +96,10 @@ async function request<T>(path: string, init?: RequestInit): Promise<T> {
     throw new Error(`Request failed: ${response.status}`)
   }
 
+  if (response.status === 204) {
+    return undefined as T
+  }
+
   return response.json() as Promise<T>
 }
 
@@ -131,6 +150,46 @@ export async function triggerScan() {
   return request<ScanStatus>('/api/admin/scan', { method: 'POST' })
 }
 
+export async function fetchPlaylists() {
+  return request<{ items: PlaylistSummary[] }>('/api/playlists')
+}
+
+export async function fetchPlaylist(id: string) {
+  return request<PlaylistDetail>(`/api/playlists/${id}`)
+}
+
+export async function createPlaylist(input: {
+  name: string
+  comment?: string
+  public?: boolean
+  trackIds?: string[]
+}) {
+  return request<PlaylistDetail>('/api/playlists', {
+    method: 'POST',
+    body: JSON.stringify(input),
+  })
+}
+
+export async function updatePlaylist(
+  id: string,
+  input: {
+    name?: string
+    comment?: string
+    public?: boolean
+    addTrackIds?: string[]
+    removeTrackIds?: string[]
+  },
+) {
+  return request<PlaylistDetail>(`/api/playlists/${id}`, {
+    method: 'PATCH',
+    body: JSON.stringify(input),
+  })
+}
+
+export async function deletePlaylist(id: string) {
+  await request<void>(`/api/playlists/${id}`, { method: 'DELETE' })
+}
+
 export function coverArtUrl(id: string) {
   const token = useSessionStore.getState().token
   return `${API_BASE}/api/cover-art/${id}${token ? `?token=${encodeURIComponent(token)}` : ''}`