refactor(lesson-preparation): V2 审计深度修复 — Server Actions i18n + 错误码模式 + 类型断言清零 + a11y 深度修复 + Tracker 埋点接入

V2-1: 12 个 Server Action 通过 getTranslations 翻译错误消息；Service/DataAccess 层抛出错误码异常（PublishServiceError/LessonPlanDataError），Actions 层通过 PUBLISH_ERROR_KEY_MAP 翻译为 i18n 消息
V2-2: SYSTEM_TEMPLATES name/title 改为 i18n 键，createLessonPlan 接受 translateTitle 函数在服务端翻译后存储到 DB
V2-3: 8 处 as unknown as 断言替换为显式类型映射函数（mapRowToLessonPlan/mapRowToListItem/mapRowToTemplate/mapRowToVersion）+ 类型守卫（isLessonPlanStatus/isTemplateType/isTemplateScope）
V2-4: MiniMap nodeColor 复用 lib/node-summary.ts 的 getNodeColor
V2-5: a11y 深度修复 — lesson-plan-filters/exercise-block/inline-question-editor 的 select 添加 label htmlFor 关联；exercise-block 题目列表改为 ul/li；node-editor 画布添加 role=application + 键盘导航配置
V2-6: Tracker 埋点接入 — 新增 useLessonPlanTrackerSafe hook，在 create/save/publish/revert/duplicate/archive 6 处调用 tracker.track

同步更新架构图 004 和 005 文档

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

@@ -6,12 +6,48 @@ import { createId } from "@paralleldrive/cuid2";
 import { db } from "@/shared/db";
 import { lessonPlanTemplates, lessonPlans } from "@/shared/db/schema";
 import { SYSTEM_TEMPLATES } from "./constants";
-import { normalizeDocument } from "./data-access";
+import { normalizeDocument, LessonPlanDataError } from "./data-access";
 import type {
   LessonPlanTemplate,
   TemplateBlockSkeleton,
+  TemplateType,
+  TemplateScope,
 } from "./types";
 
+// ---- 类型守卫：安全地将 DB string 收窄为联合类型 ----
+const TEMPLATE_TYPES = ["system", "personal"] as const;
+function isTemplateType(v: string): v is TemplateType {
+  return (TEMPLATE_TYPES as readonly string[]).includes(v);
+}
+const TEMPLATE_SCOPES = ["regular", "review", "experiment", "inquiry", "blank", "custom"] as const;
+function isTemplateScope(v: string): v is TemplateScope {
+  return (TEMPLATE_SCOPES as readonly string[]).includes(v);
+}
+
+// ---- 类型映射：Drizzle 行 → LessonPlanTemplate（Date → ISO string）----
+function mapRowToTemplate(row: {
+  id: string;
+  name: string;
+  type: string;
+  scope: string;
+  blocks: unknown;
+  creatorId: string | null;
+  createdAt: Date;
+  updatedAt: Date;
+}): LessonPlanTemplate {
+  return {
+    id: row.id,
+    name: row.name,
+    type: isTemplateType(row.type) ? row.type : "personal",
+    scope: isTemplateScope(row.scope) ? row.scope : "custom",
+    // 从 unknown 转换为 TemplateBlockSkeleton[]（DB JSON 字段）
+    blocks: row.blocks as LessonPlanTemplate["blocks"],
+    creatorId: row.creatorId,
+    createdAt: row.createdAt.toISOString(),
+    updatedAt: row.updatedAt.toISOString(),
+  };
+}
+
 export async function getLessonPlanTemplates(
   userId: string,
 ): Promise<LessonPlanTemplate[]> {
@@ -36,8 +72,7 @@ export async function getLessonPlanTemplates(
         eq(lessonPlanTemplates.creatorId, userId),
       ),
     );
-  const personalTemplates =
-    personalRows as unknown as LessonPlanTemplate[];
+  const personalTemplates = personalRows.map(mapRowToTemplate);
 
   return [...systemTemplates, ...personalTemplates];
 }
@@ -58,7 +93,7 @@ export async function saveAsTemplate(input: {
       ),
     )
     .limit(1);
-  if (plan.length === 0) throw new Error("课案不存在或无权访问");
+  if (plan.length === 0) throw new LessonPlanDataError("NOT_FOUND");
 
   const doc = normalizeDocument(plan[0].content);
   const skeleton: TemplateBlockSkeleton[] = doc.nodes.map((b) => ({