Speed up journal save with AJAX and async K-line charts.

Defer exchange chart generation to a background thread and save via XHR so fill-from-trade no longer blocks on full page reload.

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

lib/instance/templates/embed_boot_scripts.html

@@ -1318,13 +1318,6 @@ if(window.ManualOrderRrPreview){
 
 refreshAccountSnapshot();
 if (window.AccountRiskBadge) AccountRiskBadge.startTicker();
-const _journalFormEl = document.getElementById("journal-form");
-if(_journalFormEl){
-    _journalFormEl.addEventListener("submit", function(ev){
-        if(!validateJournalEntryReason()) ev.preventDefault();
-    });
-}
-
 const addOrderForm = document.getElementById("add-order-form");
 if(addOrderForm){
     addOrderForm.addEventListener("submit", function(ev){