fix(email-renderer): include brand logos in AMP and MJML exports

packages/email-renderer/test/email.test.ts

@@ -57,6 +57,27 @@ const document: BlockDocument = {
 };
 
 describe("email renderer", () => {
+  test("global brand logo survives HTML, AMP, and strict MJML export", async () => {
+    const draft = structuredClone(document);
+    draft.root.props.logoUrl = "https://example.com/logo.png";
+    draft.root.props.logoAlt = 'Brand & "Company"';
+    const result = await renderEmail(draft,{amp:true,mjml:true});
+    expect(result.ok).toBe(true);
+    if (!result.ok) return;
+    for (const output of [result.value.parts.html.content,result.value.parts.amp?.content,result.value.exports?.mjml]) {
+      expect(output).toContain('src="https://example.com/logo.png"');
+      expect(output).toContain('alt="Brand & "Company""');
+    }
+    expect(result.value.parts.amp?.validation.valid).toBe(true);
+    expect(await validateMjml(result.value.exports!.mjml!)).toEqual([]);
+    draft.root.props.logoUrl = "";
+    const empty = await renderEmail(draft,{amp:true,mjml:true});
+    expect(empty.ok).toBe(true);
+    if (empty.ok) {
+      expect(empty.value.parts.amp?.content).not.toContain("<amp-img");
+      expect(empty.value.exports?.mjml).not.toContain("<mj-image");
+    }
+  });
   test("text line breaks survive all formats without interpreting entered markup", async () => {
     const draft = structuredClone(document);
     const text = 'First line\r\nSecond line\n\n<script>alert("x")</script>\rLast line';