feat(lesson-preparation): add readonly view, anchor node selector, and type guards

- Add lesson-plan-readonly-view for viewing published plans

- Add anchor-node-selector and textbook-segments for canvas anchor positioning

- Add i18n-errors and type-guards lib utilities

- Add lesson-plan-provider-setup for provider initialization

- Update actions, data-access (knowledge, versions, main), publish-service

- Update blocks (blackboard, exercise, homework, import, key-point, objective, reflection)

- Update editor, node-editor, node-edit-panel, pickers, and providers

src/modules/lesson-preparation/data-access-versions.ts

@@ -114,6 +114,8 @@ export async function revertToVersion(
   planId: string,
   versionNo: number,
   userId: string,
+  // V3 修复：由 actions 层传入 i18n 翻译的回退标签，避免 data-access 硬编码中文
+  revertLabel: string,
 ): Promise<{ newVersionNo: number } | null> {
   const content = await getVersionContent(planId, versionNo, userId);
   if (!content) return null;
@@ -138,7 +140,7 @@ export async function revertToVersion(
       id: createId(),
       planId,
       versionNo: newNo,
-      label: `回退到 v${versionNo}`,
+      label: revertLabel,
       content,
       isAuto: false,
       creatorId: userId,