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

web/src/core-bridge/worker/resourceMetadata.ts

@@ -0,0 +1,19 @@
+import type { ChannelInfo, ShareInfo } from '../generated/api';
+import type { SavedResource } from '../database';
+
+/** Server-owned fields only: preserve local credentials, drafts, and user edit timestamps. */
+export function channelCache(raw: ChannelInfo): Partial<SavedResource> {
+  return { name: raw.settings.name ?? undefined, creatorAccount: raw.creator_account ?? undefined,
+    createdAt: raw.created_at, expiresAt: raw.expires_at, seats: raw.settings.seats,
+    maxDownloads: raw.settings.file_max_downloads,
+    ttlSeconds: raw.settings.ttl_seconds, channelMetadata: raw };
+}
+export function shareCache(raw: ShareInfo): Partial<SavedResource> {
+  if (raw.state !== 'draft' && raw.state !== 'sealed') throw new Error('分享状态无效');
+  return { createdAt: raw.sealed_at ?? raw.created_at, expiresAt: raw.expires_at, state: raw.state,
+    ttlSeconds: raw.settings.ttl_seconds, maxVisitors: raw.settings.max_visitors,
+    maxDownloads: raw.settings.file_max_downloads || null, shareMetadata: raw };
+}
+export function isOfflineFailure(error: unknown): boolean {
+  return error instanceof Error && error.message === '网络连接失败';
+}