feat(editor): save leptos island and page aggregate alignment progress

- switch main document flow toward leptos tiptap island host and generated runtime assets

- align page aggregate loading, page head single-source updates, and AI tool result recovery

- add tests and smoke scripts for title sync, AI route recovery, and editor host cutover

wolai-frontend/src/lib/runtime-config.ts

@@ -34,12 +34,17 @@ export type MnoteRuntimeConfig = {
   mnoteWebTreeShellEnabled?: boolean;
   /**
    * 编辑器 host 选择。
-   * 说明：这里只允许显式选择实验 host，默认主链仍由 BlockNote 承担。
+   * 说明：默认主链为 leptos_tiptap_island；可通过运行时配置显式切换。
    */
   documentEditorHost?:
     | "blocknote"
-    | "leptos_tiptap_inline"
+    | "leptos_tiptap_island"
     | "leptos_tiptap_iframe_debug";
+  /**
+   * 编辑器 BlockNote 回退总开关（kill switch）。
+   * 说明：开启后，未显式传入 query host 的文档页会优先回退到 blocknote。
+   */
+  documentEditorBlocknoteKillSwitch?: boolean;
   /**
    * 是否为桌面端（Electron）运行。
    */
@@ -81,6 +86,37 @@ const parseRuntimeBoolean = (value: unknown): boolean | undefined => {
   return undefined;
 };
 
+const parseDocumentEditorHost = (
+  value: unknown,
+): MnoteRuntimeConfig["documentEditorHost"] | undefined => {
+  if (typeof value !== "string") {
+    return undefined;
+  }
+  const normalized = value.trim().toLowerCase();
+  if (!normalized) {
+    return undefined;
+  }
+  if (normalized === "blocknote") {
+    return "blocknote";
+  }
+  if (
+    normalized === "leptos_tiptap_island" ||
+    normalized === "leptos_tiptap_runtime" ||
+    normalized === "leptos_tiptap_inline" ||
+    normalized === "leptos_tiptap"
+  ) {
+    return "leptos_tiptap_island";
+  }
+  if (
+    normalized === "leptos_tiptap_iframe_debug" ||
+    normalized === "leptos_tiptap_debug" ||
+    normalized === "iframe_debug"
+  ) {
+    return "leptos_tiptap_iframe_debug";
+  }
+  return undefined;
+};
+
 function getServerNodeBuiltin<T>(moduleName: string): T | null {
   if (typeof window !== "undefined") {
     return null;
@@ -135,6 +171,28 @@ const readFromEnv = (): MnoteRuntimeConfig => ({
         ),
       }
     : {}),
+  ...(parseRuntimeBoolean(
+    process.env.NEXT_PUBLIC_DOCUMENT_EDITOR_BLOCKNOTE_KILL_SWITCH ??
+      process.env.DOCUMENT_EDITOR_BLOCKNOTE_KILL_SWITCH,
+  ) !== undefined
+    ? {
+        documentEditorBlocknoteKillSwitch: parseRuntimeBoolean(
+          process.env.NEXT_PUBLIC_DOCUMENT_EDITOR_BLOCKNOTE_KILL_SWITCH ??
+            process.env.DOCUMENT_EDITOR_BLOCKNOTE_KILL_SWITCH,
+        ),
+      }
+    : {}),
+  ...(parseDocumentEditorHost(
+    process.env.NEXT_PUBLIC_DOCUMENT_EDITOR_HOST ??
+      process.env.DOCUMENT_EDITOR_HOST,
+  ) !== undefined
+    ? {
+        documentEditorHost: parseDocumentEditorHost(
+          process.env.NEXT_PUBLIC_DOCUMENT_EDITOR_HOST ??
+            process.env.DOCUMENT_EDITOR_HOST,
+        ),
+      }
+    : {}),
   onlyofficeBaseUrl: process.env.NEXT_PUBLIC_ONLYOFFICE_BASE_URL,
   onlyofficeStorageHostOverride: process.env.NEXT_PUBLIC_ONLYOFFICE_STORAGE_HOST_OVERRIDE,
   onlyofficeProxyOrigin: process.env.NEXT_PUBLIC_ONLYOFFICE_PROXY_ORIGIN,
@@ -223,12 +281,18 @@ const normalizeRuntimeConfig = (cfg: MnoteRuntimeConfig): MnoteRuntimeConfig =>
   const mnoteWebBaseUrl = (cfg.mnoteWebBaseUrl ?? "").trim().replace(/\/+$/, "");
   const mnoteWebTreeShellEnabled =
     parseRuntimeBoolean(cfg.mnoteWebTreeShellEnabled) ?? false;
+  const documentEditorHost =
+    parseDocumentEditorHost(cfg.documentEditorHost) ?? "leptos_tiptap_island";
+  const documentEditorBlocknoteKillSwitch =
+    parseRuntimeBoolean(cfg.documentEditorBlocknoteKillSwitch) ?? false;
 
   return {
     ...cfg,
     isDesktop,
     mnoteWebBaseUrl,
     mnoteWebTreeShellEnabled,
+    documentEditorHost,
+    documentEditorBlocknoteKillSwitch,
     onlyofficeBaseUrl,
     onlyofficeStorageHostOverride,
     onlyofficeProxyOrigin,