Fix double POST on open position in embed shell mode.

Embed capture-phase form handler and allowManualOrderSubmit both submitted /add_order; skip custom forms and use a single fetch reload path.

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

static/key_monitor_form.js

@@ -74,6 +74,20 @@
     });
   }
 
+  function submitKeyForm(keyForm, label) {
+    if (
+      document.body &&
+      document.body.getAttribute("data-embed-shell") === "1" &&
+      global.InstanceEmbed &&
+      typeof global.InstanceEmbed.postFormAndReload === "function"
+    ) {
+      global.InstanceEmbed.postFormAndReload(keyForm, label || "提交中…");
+      return;
+    }
+    if (global.FormSubmitGuard) global.FormSubmitGuard.nativeSubmitOnce(keyForm, label || "提交中…");
+    else keyForm.submit();
+  }
+
   function bindKeyMonitorForm() {
     const keyForm = document.getElementById("key-form");
     const keyTypeSel = document.querySelector('#key-form [name="type"]');
@@ -103,8 +117,7 @@
       }
       const typeVal = (keyForm.querySelector('[name="type"]') || {}).value || "";
       if (typeVal === "假突破") {
-        if (global.FormSubmitGuard) global.FormSubmitGuard.nativeSubmitOnce(keyForm, "提交中…");
-        else keyForm.submit();
+        submitKeyForm(keyForm, "提交中…");
         return;
       }
       if (global.FormSubmitGuard) global.FormSubmitGuard.lock(keyForm, "校验排名中…");
@@ -125,8 +138,7 @@
             if (global.FormSubmitGuard) global.FormSubmitGuard.unlock(keyForm);
             return;
           }
-          if (global.FormSubmitGuard) global.FormSubmitGuard.nativeSubmitOnce(keyForm, "提交中…");
-          else keyForm.submit();
+          submitKeyForm(keyForm, "提交中…");
         })
         .catch(() => {
           alert("日成交量排名检查失败，请稍后重试");