Method syncWorkspaces

src/browser/stores/WorkspaceStore.ts:3840–3865

* Sync workspaces with metadata - add new, remove deleted.

(workspaceMetadata: Map<string, FrontendWorkspaceMetadata>)

   * Sync workspaces with metadata - add new, remove deleted.
   */
  syncWorkspaces(workspaceMetadata: Map<string, FrontendWorkspaceMetadata>): void {
    const metadataIds = new Set(Array.from(workspaceMetadata.values()).map((m) => m.id));
    const currentIds = new Set(this.workspaceMetadata.keys());

    // Add new workspaces
    for (const metadata of workspaceMetadata.values()) {
      if (!currentIds.has(metadata.id)) {
        this.addWorkspace(metadata);
      }
    }

    // Remove deleted workspaces
    for (const workspaceId of currentIds) {
      if (!metadataIds.has(workspaceId)) {
        this.removeWorkspace(workspaceId);
      }
    }

    // Re-evaluate the active subscription after additions/removals.
    // removeWorkspace can null activeWorkspaceId when the removed workspace
    // was active (e.g., stale singleton state between integration tests),
    // leaving addWorkspace's ensureActiveOnChatSubscription targeting the
    // old workspace. This final call reconciles the subscription with the
    // current activeWorkspaceId + registration state.
    this.ensureActiveOnChatSubscription();
  }

  /**
   * Cleanup all subscriptions (call on unmount).