Styled the admin section of categories.

handlers/posts.go

@@ -53,6 +53,7 @@ func (ph PostsHandler) New(c fiber.Ctx) error {
 		"post":               p,
 		"categories":         cats,
 		"selectedCategories": map[int64]bool{},
+		"bodyClass":          "post-edit-page",
 	})
 }
 
@@ -93,6 +94,7 @@ func (ph PostsHandler) Edit(c fiber.Ctx) error {
 			"post":               post,
 			"categories":         cats,
 			"selectedCategories": selectedCategories,
+			"bodyClass":          "post-edit-page",
 		})
 	}))
 }