fix: block creation when workspace summaries fail

frontend/src/workspaces/drafts.ts

@@ -9,6 +9,8 @@ export interface WorkspaceDraft {
   updatedAt: string;
 }
 
+export class WorkspaceSelectionError extends Error {}
+
 type PolicySelection = {
   workspaceId: string;
   generation: number;
@@ -65,6 +67,13 @@ export const workspacePolicyGate = {
     }
   },
 
+  rejectSummary(workspaceId: string): void {
+    if (!selection || selection.workspaceId !== workspaceId || selection.state !== "summary") return;
+    selection.state = "error";
+    selection.error = new WorkspaceSelectionError("Could not load workspace registry. Please retry.");
+    selection.settle();
+  },
+
   clear(): void {
     selection?.supersede();
     selection = undefined;
@@ -79,7 +88,7 @@ export const workspacePolicyGate = {
   reject(workspaceId: string): void {
     if (!selection || selection.workspaceId !== workspaceId || selection.state !== "pending") return;
     selection.state = "error";
-    selection.error = new Error("Selected workspace policy could not be loaded.");
+    selection.error = new WorkspaceSelectionError("Could not load selected workspace policy. Please retry.");
     selection.settle();
   },