feat(web): add account workspaces and signed content flows

web/src/core-bridge/protocol/workspace.ts

@@ -0,0 +1,15 @@
+/** Encrypted resource metadata v1. Account and structure DTOs are generated from the backend. */
+export interface PublishedFile {
+  id: string;
+  kind: 'file';
+  threadId: string;
+  folderId?: string;
+  name: string;
+  mime: string;
+  size: number;
+  ts: number;
+  deviceId: string;
+  gated: boolean;
+}
+export type ResourceControl = { op: 'file.published'; item: PublishedFile };
+export const WORKSPACE_APP = 'webdrop.workspace';