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/shared/i18n/messages/en/lesson-preparation.json

@@ -63,9 +63,30 @@
       "tpl_experiment": "Experiment Lesson",
       "tpl_inquiry": "Inquiry Lesson",
       "tpl_blank": "Blank Template"
+    },
+    "blocks": {
+      "tpl_review": {
+        "1": "Knowledge Network",
+        "2": "Typical Examples",
+        "3": "Variant Training"
+      },
+      "tpl_experiment": {
+        "1": "Equipment Preparation",
+        "2": "Experiment Steps",
+        "3": "Observation Record",
+        "4": "Discussion"
+      },
+      "tpl_inquiry": {
+        "0": "Scenario Introduction",
+        "1": "Problem Driven",
+        "2": "Group Inquiry",
+        "3": "Results Presentation",
+        "4": "Inductive Elevation"
+      }
     }
   },
   "editor": {
+    "canvasLabel": "Lesson Plan Canvas",
     "canvasEmpty": "Canvas is empty",
     "canvasEmptyHint": "Click \"Add Node\" at the bottom left to start",
     "selectNodeHint": "Click a node to edit content, or drag to connect",
@@ -142,6 +163,7 @@
     "addBtn": "Add"
   },
   "exercise": {
+    "purposeLabel": "Purpose",
     "purpose": {
       "class_practice": "Class Practice",
       "after_class_homework": "After-class Homework"

src/shared/i18n/messages/zh-CN/lesson-preparation.json

@@ -63,9 +63,30 @@
       "tpl_experiment": "实验课",
       "tpl_inquiry": "探究课",
       "tpl_blank": "空白模板"
+    },
+    "blocks": {
+      "tpl_review": {
+        "1": "知识网络梳理",
+        "2": "典型例题精讲",
+        "3": "变式训练"
+      },
+      "tpl_experiment": {
+        "1": "器材准备",
+        "2": "实验步骤",
+        "3": "观察记录表",
+        "4": "交流讨论"
+      },
+      "tpl_inquiry": {
+        "0": "情境导入",
+        "1": "问题驱动",
+        "2": "小组探究",
+        "3": "成果展示",
+        "4": "归纳提升"
+      }
     }
   },
   "editor": {
+    "canvasLabel": "备课画布",
     "canvasEmpty": "画布为空",
     "canvasEmptyHint": "点击左下角\"添加节点\"开始备课",
     "selectNodeHint": "点击节点编辑内容，或拖拽连线建立流程",
@@ -142,6 +163,7 @@
     "addBtn": "添加"
   },
   "exercise": {
+    "purposeLabel": "用途",
     "purpose": {
       "class_practice": "课堂练习",
       "after_class_homework": "课后作业"