feat(10.1-02): render header and form partials through an allowlisted node renderer

- partialNodes rebuilds the server node tree with h() under the server's tag, attribute and URL lists
- PartialHost owns the skeleton, empty and failure states and keeps nodes visible on refetch
- type: partial is a valueless group-labelled field rendered on create and update
- ListView shows headerPartial above the list card and refetches it after bulk delete
- summer-partial and summer-stats style kit in main.css, documented in the cabana README; dist rebuilt

modules/boardwalk/dist/index.html

@@ -6,8 +6,8 @@
     <meta name="robots" content="noindex, nofollow" />
     <meta name="summer-admin-base" content="__SUMMER_ADMIN_BASE__" />
     <title>SummerCMS</title>
-    <script type="module" crossorigin src="./assets/index-CnkxaoJL.js"></script>
-    <link rel="stylesheet" crossorigin href="./assets/index-DQRkkGSM.css">
+    <script type="module" crossorigin src="./assets/index-D9vrCBt0.js"></script>
+    <link rel="stylesheet" crossorigin href="./assets/index-CfeX_snf.css">
   </head>
   <body>
     <div id="app"></div>