Render a guest email for podcast-episode-brief docs

backend/src/sponsorDocs/templates.ts

@@ -1675,10 +1675,26 @@ export function renderSponsorEmailDraft(options: {
     return { subject, body };
   }
 
+  if (options.template === 'podcast-episode-brief') {
+    const firstName = options.recipientName?.trim().split(/\s+/)[0];
+    const body = [
+      firstName ? `Hi ${firstName},` : 'Hi <NAME>,',
+      '',
+      `Here is the episode brief with the structure and questions for ${pubDate}:`,
+      '',
+      options.shareUrl,
+      `(Access code if prompted: ${options.accessCode})`,
+      '',
+      'Please have a look and let us know if you would like any changes to the structure or the questions.',
+      '',
+      'Thank you!',
+    ].join('\n');
+    return { subject, body };
+  }
+
   if (
     options.template === 'podcast-guest-research'
     || options.template === 'podcast-run-sheet'
-    || options.template === 'podcast-episode-brief'
   ) {
     const body = [
       'Hi team,',

backend/tests/podcast-doc-email.test.ts

@@ -0,0 +1,25 @@
+import { describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { renderSponsorEmailDraft } from '../src/sponsorDocs/templates';
+
+const base = { sponsorName: 'Sofiia Hordiienko', publicationDate: '2026-11-20 15:00', shareUrl: 'https://example.test/doc', accessCode: 'code-1' };
+
+describe('podcast doc emails', () => {
+  it('renders a guest email for the episode brief', () => {
+    const { body } = renderSponsorEmailDraft({ ...base, template: 'podcast-episode-brief', recipientName: 'Sofiia Hordiienko' });
+    assert.match(body, /Hi Sofiia,/);
+    assert.match(body, /episode brief with the structure and questions for 2026-11-20 15:00/);
+    assert.match(body, /https:\/\/example\.test\/doc/);
+    assert.match(body, /code-1/);
+    assert.match(body, /any changes/);
+    assert.doesNotMatch(body, /Hi team|staff-only|Internal/);
+  });
+
+  for (const template of ['podcast-guest-research', 'podcast-run-sheet'] as const) {
+    it(`keeps staff wording for ${template}`, () => {
+      const { body } = renderSponsorEmailDraft({ ...base, template });
+      assert.match(body, /Hi team,/);
+      assert.match(body, /staff-only working document/);
+    });
+  }
+});