various css fixes, fix new image loading bug when previewing, path docs

Jacky Zhao

2023-08-08 527ce6546e7ec50e7720ff7b9b6ff79a89c3b7fc

 quartz/components/Header.tsx

@@ -9,7 +9,7 @@
  display: flex;
  flex-direction: row;
  align-items: center;
  margin: 2em 0;
  margin: 2rem 0;
  gap: 1.5rem;
}