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-versions.ts

@@ -8,6 +8,29 @@ import { lessonPlanVersions, lessonPlans } from "@/shared/db/schema";
 import { normalizeDocument } from "./data-access";
 import type { LessonPlanDocument, LessonPlanVersion } from "./types";
 
+// ---- 类型映射：Drizzle 行 → LessonPlanVersion（Date → ISO string）----
+function mapRowToVersion(row: {
+  id: string;
+  planId: string;
+  versionNo: number;
+  label: string | null;
+  content: unknown;
+  isAuto: boolean;
+  creatorId: string;
+  createdAt: Date;
+}): LessonPlanVersion {
+  return {
+    id: row.id,
+    planId: row.planId,
+    versionNo: row.versionNo,
+    label: row.label,
+    content: normalizeDocument(row.content),
+    isAuto: row.isAuto,
+    creatorId: row.creatorId,
+    createdAt: row.createdAt.toISOString(),
+  };
+}
+
 export async function getLessonPlanVersions(
   planId: string,
   userId: string,
@@ -27,7 +50,7 @@ export async function getLessonPlanVersions(
     .from(lessonPlanVersions)
     .where(eq(lessonPlanVersions.planId, planId))
     .orderBy(desc(lessonPlanVersions.versionNo));
-  return rows as unknown as LessonPlanVersion[];
+  return rows.map(mapRowToVersion);
 }
 
 export async function createLessonPlanVersion(input: {