fix: allow posts to be made with empty content if an image is uploaded

fix: chats websocket message delete

crates/core/src/database/posts.rs

@@ -836,7 +836,7 @@ impl DataManager {
         };
 
         if !is_reposting {
-            if data.content.len() < 2 {
+            if data.content.len() < 2 && data.uploads.len() == 0 {
                 return Err(Error::DataTooShort("content".to_string()));
             } else if data.content.len() > 4096 {
                 return Err(Error::DataTooLong("content".to_string()));