Support comment updates and multipart post uploads

test/app.e2e-spec.ts

@@ -66,6 +66,7 @@ describe('Oudelaa smoke (e2e)', () => {
     secondRefreshToken: '',
   };
   let postId = '';
+  let editableCommentId = '';
 
   beforeAll(async () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
@@ -270,6 +271,57 @@ describe('Oudelaa smoke (e2e)', () => {
     expect(mention).toBeTruthy();
   });
 
+  it('updates own comment content and mention usernames', async () => {
+    const createResponse = await request(app.getHttpServer())
+      .post('/api/v1/comments')
+      .set('Authorization', `Bearer ${secondary.accessToken}`)
+      .send({
+        postId,
+        content: 'Needs edit',
+      })
+      .expect(201);
+
+    editableCommentId = createResponse.body._id || createResponse.body.id;
+
+    const updatedContent = `Edited with @${primary.username}`;
+    const updateResponse = await request(app.getHttpServer())
+      .patch(`/api/v1/comments/${editableCommentId}`)
+      .set('Authorization', `Bearer ${secondary.accessToken}`)
+      .send({
+        content: updatedContent,
+        mentionUsernames: [primary.username],
+      })
+      .expect(200);
+
+    expect(updateResponse.body.content).toBe(updatedContent);
+    expect(updateResponse.body.mentionUsernames).toContain(primary.username.toLowerCase());
+
+    const commentsResponse = await request(app.getHttpServer())
+      .get(`/api/v1/comments/post/${postId}?page=1&limit=20`)
+      .set('Authorization', `Bearer ${primary.accessToken}`)
+      .expect(200);
+
+    const updatedComment = (commentsResponse.body.items ?? []).find(
+      (item: any) => (item._id || item.id) === editableCommentId,
+    );
+
+    expect(updatedComment?.content).toBe(updatedContent);
+
+    const notificationsResponse = await request(app.getHttpServer())
+      .get('/api/v1/notifications?resourceType=comment')
+      .set('Authorization', `Bearer ${primary.accessToken}`)
+      .expect(200);
+
+    const mention = (notificationsResponse.body.items ?? []).find(
+      (item: any) =>
+        item.type === 'mention' &&
+        item.resourceType === 'comment' &&
+        item.previewText === updatedContent,
+    );
+
+    expect(mention).toBeTruthy();
+  });
+
   it('supports superadmin sessions refresh rotation and notifications access', async () => {
     const loginOne = await request(app.getHttpServer())
       .post('/api/v1/auth/superadmin/login')