changes

src/app/fastcheck.service.ts

@@ -0,0 +1,28 @@
+import { Injectable, signal } from '@angular/core';
+
+export interface FastcheckData {
+  fastcheck: string;
+  amount: number;
+  code: string;
+  expiration?: string;
+}
+
+/**
+ * Shared state between the home (Fastcheck) page and the create-new page.
+ * When a new fastcheck is created via POST /fastcheck, the create page stores
+ * the returned data here and the home page reads it to autofill its fields.
+ */
+@Injectable({ providedIn: 'root' })
+export class FastcheckService {
+  readonly created = signal<FastcheckData | null>(null);
+
+  setCreated(data: FastcheckData): void {
+    this.created.set(data);
+  }
+
+  consume(): FastcheckData | null {
+    const value = this.created();
+    this.created.set(null);
+    return value;
+  }
+}