Completer.js: Trigger autosubmit when no suggestion is selected and completer isn’t in term input

Ensure the form submits automatically when:

- The completer is not part of term input or instrumented
- The completer has the autosubmit dataset attribute
- No suggestion is explicitly selected

Author: raviks789

asset/js/widget/Completer.js

@@ -498,6 +498,13 @@ define(["../notjQuery"], function ($) {
                     }
 
                     this.hideSuggestions();
+
+                    // Autosubmit when user leaves without selecting a suggestion.
+                    // Only for non-instrumented mode — instrumented inputs (e.g. TermInput) handle
+                    // autosubmit themselves via BaseInput.autoSubmit() with proper term data.
+                    if (! this.instrumented && this.shouldAutoSubmit()) {
+                        $(completedInput.form).trigger('submit', { submittedBy: completedInput });
+                    }
                 }
             }, 250);
         }