修改

static/form_submit_guard.js

@@ -49,10 +49,24 @@
         return !!(form && form.dataset.submitGuard === "locked");
     }
 
+    /** 已锁定时仅更新按钮文案（校验通过 → 真正提交前） */
+    function setSubmitLabel(form, label) {
+        if (!form || !label) return;
+        submitButtons(form).forEach(function (btn) {
+            if (btn.tagName === "BUTTON") btn.textContent = label;
+            else btn.value = label;
+        });
+    }
+
     /** 已通过前端校验，发起最终 POST（页面将跳转） */
     function nativeSubmitOnce(form, label) {
         if (!form) return;
-        lockForm(form, label || "提交中…");
+        var text = label || "提交中…";
+        if (form.dataset.submitGuard === "locked") {
+            setSubmitLabel(form, text);
+        } else {
+            lockForm(form, text);
+        }
         form.submit();
     }
 
@@ -60,6 +74,7 @@
         lock: lockForm,
         unlock: unlockForm,
         isLocked: isLocked,
+        setSubmitLabel: setSubmitLabel,
         nativeSubmitOnce: nativeSubmitOnce,
     };
 })(typeof window !== "undefined" ? window : this);