style: remove hyphens from compound adjectives in comments and messages

Remove hyphens from compound adjectives such as "logged-in", "one-time", "password-protected", "full-height", "multi-file", and "S3-compatible" in comments, test error messages, and UI labels to improve readability and consistency.

backend/libs/handlers/upload.go

@@ -222,7 +222,7 @@ func (a *App) createOrAppendBox(r *http.Request, user services.User, loggedIn bo
 }
 
 // batchBoxMatches guards that a batched append only ever touches a box owned by
-// the same uploader (account for logged-in users, creator IP for anonymous).
+// the same uploader (account for logged in users, creator IP for anonymous).
 func (a *App) batchBoxMatches(box services.Box, user services.User, loggedIn bool, r *http.Request) bool {
 	if loggedIn {
 		return box.OwnerID == user.ID