feat(lesson-preparation): add anchor canvas design, new blocks, and textbook content node

- Add anchor injector for canvas-based anchor positioning

- Add new block components: blackboard, homework, import, key-point, new-teaching, objective, summary

- Add textbook content node for React Flow canvas

- Update actions (kp, publish, main), data-access (templates, versions, main)

- Update editor, node-editor, block-renderer, and picker components

- Update schema, types, hooks, and lib utilities (document-migration, node-summary, rf-mappers)

src/modules/lesson-preparation/lib/node-summary.ts

@@ -1,4 +1,4 @@
-import type { LessonPlanNode } from "../types";
+import type { LessonPlanNode, TextbookContentNode } from "../types";
 
 /**
  * 节点摘要翻译函数接口。
@@ -6,7 +6,17 @@ import type { LessonPlanNode } from "../types";
  * values 类型对齐 next-intl 的 TranslationValues（string | number | Date）。
  */
 export interface NodeSummaryT {
-  (key: "editor.questionCount" | "editor.charCount" | "editor.nodeSummaryEmpty", values?: Record<string, string | number | Date>): string;
+  (
+    key:
+      | "editor.questionCount"
+      | "editor.charCount"
+      | "editor.nodeSummaryEmpty"
+      | "editor.itemCount"
+      | "editor.pointCount"
+      | "editor.assignmentCount"
+      | "editor.durationMin",
+    values?: Record<string, string | number | Date>,
+  ): string;
 }
 
 /**
@@ -16,17 +26,69 @@ export interface NodeSummaryT {
  */
 export function getNodeSummary(node: LessonPlanNode, t: NodeSummaryT): string {
   const data = node.data as {
+    // 富文本类
     html?: string;
+    // 文本研习
     sourceText?: string;
+    annotations?: unknown[];
+    // 练习
     items?: unknown[];
+    // 教学目标
+    objectives?: unknown[];
+    // 重难点
+    keyPoints?: unknown[];
+    // 导入
+    durationMin?: number;
+    prompt?: string;
+    // 新授
+    teachingPoints?: unknown[];
+    // 小结
+    summaryPoints?: unknown[];
+    // 作业
+    assignments?: unknown[];
+    // 板书
+    content?: string;
+    // 反思
+    reflection?: unknown[];
+    // 知识点
     knowledgePointIds?: string[];
   };
+
+  // 按类型优先级提取摘要
   if (data.items !== undefined) {
     return t("editor.questionCount", { count: data.items.length });
   }
+  if (data.objectives !== undefined) {
+    return t("editor.itemCount", { count: data.objectives.length });
+  }
+  if (data.keyPoints !== undefined) {
+    return t("editor.itemCount", { count: data.keyPoints.length });
+  }
+  if (data.teachingPoints !== undefined) {
+    return t("editor.pointCount", { count: data.teachingPoints.length });
+  }
+  if (data.summaryPoints !== undefined) {
+    return t("editor.itemCount", { count: data.summaryPoints.length });
+  }
+  if (data.assignments !== undefined) {
+    return t("editor.assignmentCount", { count: data.assignments.length });
+  }
+  if (data.reflection !== undefined) {
+    return t("editor.itemCount", { count: data.reflection.length });
+  }
+  if (data.durationMin !== undefined) {
+    return t("editor.durationMin", { count: data.durationMin });
+  }
+  if (data.annotations !== undefined && data.sourceText !== undefined) {
+    return t("editor.charCount", { count: data.sourceText.length });
+  }
   if (data.sourceText !== undefined && data.sourceText) {
     return t("editor.charCount", { count: data.sourceText.length });
   }
+  if (data.content !== undefined && data.content) {
+    const text = data.content.replace(/<[^>]+>/g, "").trim();
+    return text.slice(0, 40) || t("editor.nodeSummaryEmpty");
+  }
   if (data.html) {
     // 去标签后取前 40 字
     const text = data.html.replace(/<[^>]+>/g, "").trim();
@@ -35,6 +97,17 @@ export function getNodeSummary(node: LessonPlanNode, t: NodeSummaryT): string {
   return t("editor.nodeSummaryEmpty");
 }
 
+/**
+ * 纯函数：获取正文节点摘要。
+ */
+export function getTextbookContentSummary(
+  node: TextbookContentNode,
+  t: NodeSummaryT,
+): string {
+  if (!node.data.content) return t("editor.nodeSummaryEmpty");
+  return t("editor.charCount", { count: node.data.content.length });
+}
+
 /**
  * 节点类型 → 图标颜色（Material Design 色板）。
  * 供 lesson-node 和 minimap 复用。
@@ -52,6 +125,7 @@ export const NODE_COLORS: Record<string, string> = {
   exercise: "#e91e63",
   rich_text: "#9e9e9e",
   reflection: "#cddc39",
+  textbook_content: "#455a64",
 };
 
 export function getNodeColor(type: string): string {