Fix sanitizeLinks to preserve nested elements (internal-8812)

GitOrigin-RevId: 2a466ce26aaa289522a0031eba01ebac83c70087

Author: stepankuzmin

src/util/sanitize.ts

@@ -11,11 +11,11 @@ export function sanitizeLinks(html: string): string {
     const doc = parser.parseFromString(html, 'text/html');
     const elements = Array.from(doc.body.querySelectorAll('*'));
 
-    elements.forEach(el => {
+    elements.reverse().forEach(el => {
         const text = el.textContent || '';
 
         if (el.tagName !== 'A') {
-            el.replaceWith(doc.createTextNode(text));
+            el.replaceWith(...el.childNodes);
             return;
         }
 

test/unit/util/sanitize.test.ts

@@ -152,5 +152,14 @@ describe('sanitize', () => {
 
             expect(result).toBe(text);
         });
+
+        test('preserves links nested in other elements', () => {
+            const nested = '<div>Please click <a href="https://google.com">here</a></div>';
+            const result = sanitizeLinks(nested);
+
+            expect(result).toContain('<a');
+            expect(result).toContain('href="https://google.com"');
+            expect(result).toContain('>here</a>');
+        });
     });
 });