feat(web): add spaces, grouped channels and file chat

web/src/core-bridge/channelAccess.ts

@@ -0,0 +1,9 @@
+import { callWorker } from './workerClient';
+import type { ChannelInfo } from './types';
+import type { ParsedChannelLink } from '@/lib/channelLink';
+const apiBase = import.meta.env.VITE_WEBDROP_API_URL ?? '/api/v1';
+export interface ChannelMember { username: string; role: 'owner' | 'member'; joined_at: number }
+export const channelAccessApi = {
+  members: (id: string) => callWorker<ChannelMember[]>('channelMembers', { id, apiBase }),
+  preview: (link: ParsedChannelLink) => callWorker<ChannelInfo>('previewChannel', { link, apiBase }),
+};