PR Review

This pull request was nicely done! I appreciate your changes to Header.tsx for the Apartment and Landlord pages! The macro-level split between mobile and desktop layouts made it difficult to adjust every time a small change was made, but you made the code structure more concise by combining the two and using ternary operators to differentiate at the micro level. The photo carousel was also really well done. The modal design works perfectly on both desktop and mobile.

I would say it is nearly perfect, but I would like to point out a few things that could be improved for consistency and simplicity purposes.

1. After removing parts of the code in Header.tsx, you can remove the imports that are no longer used to simplify the code, below is what eslint noticed:

src/components/Apartment/Header.tsx
  Line 6:3:    'Button' is defined but never used               @typescript-eslint/no-unused-vars
  Line 9:3:    'Avatar' is defined but never used               @typescript-eslint/no-unused-vars
  Line 192:5:  'btnSection' is assigned a value but never used  @typescript-eslint/no-unused-vars

src/components/Landlord/Header.tsx
  Line 10:3:   'Avatar' is defined but never used         @typescript-eslint/no-unused-vars
  Line 150:9:  'icon' is assigned a value but never used  @typescript-eslint/no-unused-vars

src/components/PhotoCarousel/PhotoCarousel.tsx
  Line 2:10:  'Modal' is defined but never used  @typescript-eslint/no-unused-vars

2. On mobile, the marginLeft styling seems to incorrectly shift the header image, causing the header image to not fully extend to the edges of the screen. If you zoom in on the left, you can see a pixel gap between the edge of the screen and the image. This is a really small thing, but it could be nice to fix if you have the time. It could also have to do with the root paddingLeft and paddingRight, because when I disabled those in developer tools, it resolved the issue.

Overall, these are extremely minor issues, so great work on this PR, it looks great!

Clean implementation. UI looks good.