Upload feature (c): atomic UI components (atoms/molecules/organisms) + stories

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/shared/ui/upload/upload-status-banner/upload-status-banner.component.ts

@@ -0,0 +1,23 @@
+import { Component, computed, input } from '@angular/core';
+import { AlertComponent } from '@shared/ui/alert/alert.component';
+
+type BannerType = 'info' | 'warning' | 'error';
+type AlertType = 'info' | 'ok' | 'warning' | 'error';
+
+/** Molecule: a polite, announced status banner. Wraps the alert atom and maps the
+    banner type to an alert type. Pure UI: the container computes the message. */
+@Component({
+  selector: 'app-upload-status-banner',
+  imports: [AlertComponent],
+  template: `
+    <div aria-live="polite">
+      <app-alert [type]="alertType()">{{ message() }}</app-alert>
+    </div>
+  `,
+})
+export class UploadStatusBannerComponent {
+  message = input.required<string>();
+  type = input<BannerType>('info');
+
+  protected readonly alertType = computed<AlertType>(() => (this.type() === 'info' ? 'info' : this.type()));
+}

src/app/shared/ui/upload/upload-status-banner/upload-status-banner.stories.ts

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+import type { Meta, StoryObj } from '@storybook/angular';
+import { UploadStatusBannerComponent } from './upload-status-banner.component';
+
+const meta: Meta<UploadStatusBannerComponent> = {
+  title: 'Molecules/UploadStatusBanner',
+  component: UploadStatusBannerComponent,
+  render: (args) => ({
+    props: args,
+    template: `<app-upload-status-banner [message]="message" [type]="type" />`,
+  }),
+};
+export default meta;
+type Story = StoryObj<UploadStatusBannerComponent>;
+
+export const Info: Story = {
+  args: { type: 'info', message: 'Uw documenten worden geüpload.' },
+};
+
+export const Error: Story = {
+  args: { type: 'error', message: 'De categorieën konden niet worden geladen.' },
+};