Fix journal AJAX save in embed so trades stay loaded.

Delegate submit handling for late-mounted #journal-form across OKX/Binance/Gate, avoid full reload fallback, and soft-refresh trade rows after save.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/common/static/instance_embed.js

@@ -155,6 +155,9 @@
         const root = pageRoot() || document;
         global.JournalUploadSlots.init(root);
       }
+      if (global.JournalFormSave && typeof global.JournalFormSave.init === "function") {
+        global.JournalFormSave.init();
+      }
     }
   }