fix: mount create action bar in main content

apps/ui/src/pages/operation-create/page.tsx

@@ -1,10 +1,5 @@
 import { OperationForm } from "../../features/operation-form/operation-form";
 
 export function OperationCreatePage() {
-  return (
-    <div className="create-page-layout">
-      <OperationForm actionBarContainerId="operation-create-action-bar" />
-      <div className="sticky-action-bar-slot" id="operation-create-action-bar" />
-    </div>
-  );
+  return <OperationForm actionBarContainerId="app-main-content" />;
 }

apps/ui/src/shared/ui/app-shell.tsx

@@ -121,7 +121,7 @@ export function AppShell({ children }: AppShellProps) {
           </div>
         </header>
 
-        <main className="main-content">
+        <main className="main-content" id="app-main-content">
           <div className="page-header">
             <h1>{meta.heading}</h1>
             <p>{meta.subtitle}</p>

apps/ui/src/styles.css

@@ -398,7 +398,6 @@ button {
 .page-stack,
 .stack-layout,
 .builder-stack,
-.create-page-layout,
 .service-grid,
 .service-method-list {
   display: grid;
@@ -893,10 +892,6 @@ button {
   font-size: 12.5px;
 }
 
-.sticky-action-bar-slot {
-  width: 100%;
-}
-
 .field-error {
   color: #a1422c;
   font-size: 12px;