fix: Double recursive loops can cause server lockup on deeply nested docs (#5222)

server/utils/parseImages.test.ts

@@ -3,6 +3,7 @@ import parseImages from "./parseImages";
 it("should not return non images", () => {
   expect(parseImages(`# Header`).length).toBe(0);
 });
+
 it("should return an array of images", () => {
   const result = parseImages(`# Header
   
@@ -11,9 +12,22 @@ it("should return an array of images", () => {
   expect(result.length).toBe(1);
   expect(result[0]).toBe("/attachments/image.png");
 });
+
+it("should return deeply nested images", () => {
+  const result = parseImages(`# Header
+  
+- one
+  - two
+    - three ![internal](/attachments/image.png)
+  `);
+  expect(result.length).toBe(1);
+  expect(result[0]).toBe("/attachments/image.png");
+});
+
 it("should not return non document links", () => {
   expect(parseImages(`[google](http://www.google.com)`).length).toBe(0);
 });
+
 it("should not return non document relative links", () => {
   expect(parseImages(`[relative](/developers)`).length).toBe(0);
 });