fix: Link attachment in webform for new file (bp #12097) (#12102)

(cherry picked from commit 85d6a64)

Co-authored-by: Suraj Shetty <13928957+surajshetty3416@users.noreply.github.com>

frappe/public/js/frappe/web_form/web_form.js

@@ -103,6 +103,7 @@ export default class WebForm extends frappe.ui.FieldGroup {
 	}
 
 	save() {
+		let is_new = this.is_new;
 		if (this.validate && !this.validate()) {
 			frappe.throw(__("Couldn't save, please check the data you have entered"), __("Validation Error"));
 		}
@@ -139,6 +140,18 @@ export default class WebForm extends frappe.ui.FieldGroup {
 					this.handle_success(response.message);
 					frappe.web_form.events.trigger('after_save');
 					this.after_save && this.after_save();
+					// args doctype and docname added to link doctype in file manager
+					if (is_new) {
+						frappe.call({
+							type: 'POST',
+							method: "frappe.handler.upload_file",
+							args: {
+								file_url: response.message.attachment,
+								doctype: response.message.doctype,
+								docname: response.message.name
+							}
+						});
+					}
 				}
 			},
 			always: function() {