feat(shared,tests): add error boundaries, lib utils, i18n messages, and integration tests

shared:

- Add class-filter, error-state, route-error, section-error-boundary, widget-boundary components

- Add ui/alert component

- Add constants directory

- Add breached-password, export-utils, permission-bitmap, rate-limit, resolve-action-error, route-permissions, route-resolver, type-guards lib

- Add i18n messages (en, zh-CN) for invitation-codes, parent, questions, rbac

tests:

- Add integration tests for elective

- Add tests/setup/empty-stub

scripts:

- Add update-md.cjs, tmp_append_en.ps1, tmp_merge_en.ps1 utilities

src/shared/i18n/messages/zh-CN/course-plans.json

@@ -12,5 +12,223 @@
   "create": {
     "title": "新建课程计划",
     "description": "创建新的课程教学计划。"
+  },
+  "status": {
+    "planning": "规划中",
+    "active": "进行中",
+    "completed": "已完成",
+    "paused": "已暂停"
+  },
+  "filter": {
+    "all": "全部",
+    "placeholder": "按状态筛选"
+  },
+  "list": {
+    "new": "新建课程计划",
+    "empty": "暂无课程计划。",
+    "emptyFiltered": "当前筛选条件下无课程计划。",
+    "unknownSubject": "未知学科",
+    "noClass": "无班级",
+    "semester": "第 {semester} 学期",
+    "created": "创建于 {date}",
+    "teacher": "教师：{name}",
+    "unassigned": "未分配",
+    "emptyCta": "立即创建第一个课程计划"
+  },
+  "detail": {
+    "back": "返回课程计划列表",
+    "heading": "课程计划",
+    "edit": "编辑",
+    "delete": "删除",
+    "noClass": "无班级",
+    "unknownSubject": "未知学科",
+    "unknownSubjectHeading": "课程计划",
+    "semester": "第 {semester} 学期",
+    "teacher": "教师：{name}",
+    "unassigned": "未分配",
+    "created": "创建于 {date}",
+    "startDate": "开始 {date}",
+    "endDate": "结束 {date}",
+    "syllabus": "教学大纲",
+    "objectives": "教学目标",
+    "weekPlans": "周计划",
+    "addWeekPlan": "添加周计划",
+    "emptyWeekPlans": "暂无周计划。",
+    "emptyWeekPlansCta": "点击「添加周计划」创建第一条。",
+    "week": "周次",
+    "topic": "主题",
+    "hours": "课时",
+    "chapter": "章节",
+    "statusCol": "状态",
+    "completed": "已完成",
+    "pending": "待完成",
+    "notes": "备注：{notes}",
+    "dragHandle": "拖拽手柄（按住可调整顺序）",
+    "selectWeekAria": "选择第 {week} 周",
+    "reorderFailed": "调整顺序失败，请重试",
+    "reorderSaved": "顺序已保存",
+    "viewTextbookAria": "查看教材章节：{chapter}",
+    "viewHomeworkAria": "查看相关作业",
+    "deleteTitle": "删除课程计划",
+    "deleteDescription": "此操作将永久删除该课程计划及其所有周计划。"
+  },
+  "form": {
+    "new": "新建课程计划",
+    "edit": "编辑课程计划",
+    "class": "班级",
+    "selectClass": "选择班级",
+    "subject": "学科",
+    "selectSubject": "选择学科",
+    "teacher": "教师",
+    "selectTeacher": "选择教师",
+    "academicYear": "学年",
+    "optional": "可选",
+    "semester": "学期",
+    "semester1": "第一学期",
+    "semester2": "第二学期",
+    "status": "状态",
+    "selectStatus": "选择状态",
+    "totalHours": "总课时",
+    "weeklyHours": "周课时",
+    "startDate": "开始日期",
+    "endDate": "结束日期",
+    "syllabus": "教学大纲",
+    "syllabusPlaceholder": "教学大纲内容...",
+    "objectives": "教学目标",
+    "objectivesPlaceholder": "教学目标内容...",
+    "cancel": "取消",
+    "create": "创建",
+    "save": "保存",
+    "saving": "保存中...",
+    "invalidState": "表单状态无效",
+    "saveFailed": "保存课程计划失败"
+  },
+  "item": {
+    "addTitle": "添加周计划",
+    "editTitle": "编辑周计划",
+    "week": "周次",
+    "hours": "课时",
+    "topic": "主题",
+    "topicPlaceholder": "本周主题",
+    "content": "内容",
+    "contentPlaceholder": "教学内容...",
+    "chapter": "教材章节",
+    "chapterPlaceholder": "如：第三章",
+    "completedAt": "完成日期",
+    "notes": "备注",
+    "notesPlaceholder": "备注...",
+    "markComplete": "标记完成",
+    "markIncomplete": "标记未完成",
+    "delete": "删除",
+    "cancel": "取消",
+    "save": "保存",
+    "saving": "保存中...",
+    "invalidState": "表单状态无效",
+    "saveFailed": "保存周计划失败",
+    "deleteFailed": "删除失败",
+    "updateFailed": "更新失败"
+  },
+  "progress": {
+    "label": "进度",
+    "hours": "{completed} / {total} 课时（{percent}%）",
+    "weekPlansCompleted": "{completed} / {total} 个周计划已完成"
+  },
+  "toast": {
+    "created": "课程计划已创建",
+    "updated": "课程计划已更新",
+    "deleted": "课程计划已删除",
+    "weekAdded": "周计划已添加",
+    "weekUpdated": "周计划已更新",
+    "weekDeleted": "周计划已删除",
+    "markedComplete": "已标记为完成",
+    "markedIncomplete": "已标记为未完成",
+    "deleteFailed": "删除失败",
+    "saveFailed": "保存失败",
+    "reorderSaved": "排序已保存",
+    "reorderFailed": "排序保存失败",
+    "bulkMarked": "已批量标记 {count} 条完成",
+    "bulkFailed": "批量操作失败",
+    "copySuccess": "课程计划已复制到 {count} 个班级",
+    "copyFailed": "复制失败",
+    "exportFailed": "导出失败",
+    "invalidGradeId": "年级 ID 无效"
+  },
+  "teacher": {
+    "title": "我的课程计划",
+    "description": "查看您的课程教学计划与周课时安排。"
+  },
+  "parent": {
+    "title": "孩子课程计划",
+    "description": "查看孩子所在班级的课程教学计划。"
+  },
+  "student": {
+    "title": "课程计划",
+    "description": "查看本班课程教学计划与每周教学安排。"
+  },
+  "errors": {
+    "notFound": "课程计划不存在",
+    "invalidForm": "表单数据无效",
+    "invalidGradeId": "年级 ID 无效",
+    "noPermission": "无权访问该课程计划",
+    "loadFailed": "课程计划加载失败",
+    "loadFailedDesc": "加载课程计划数据时发生错误，请稍后重试。",
+    "retry": "重试"
+  },
+  "error": {
+    "boundaryTitle": "课程计划区块加载失败",
+    "boundaryDescription": "加载课程计划数据时发生错误，请重试。",
+    "retry": "重试"
+  },
+  "calendar": {
+    "title": "日历视图",
+    "list": "列表视图",
+    "noPlans": "该时间段暂无教学安排",
+    "prevMonth": "上一月",
+    "nextMonth": "下一月",
+    "today": "今天",
+    "monthTitle": "{year}年{month}月",
+    "weekShort": ["一", "二", "三", "四", "五", "六", "日"],
+    "weekFull": ["周一", "周二", "周三", "周四", "周五", "周六", "周日"],
+    "week": "第 {week} 周",
+    "hours": "{hours} 课时",
+    "completed": "已完成",
+    "pending": "待完成",
+    "noStartDate": "课程计划未设置开始日期，无法在日历中显示教学安排。"
+  },
+  "export": {
+    "title": "导出",
+    "csv": "导出 CSV",
+    "pdf": "导出 PDF",
+    "excel": "导出 Excel",
+    "exported": "课程计划已导出",
+    "exportFailed": "导出失败",
+    "filename": "课程计划-{subject}-{className}",
+    "content": "内容",
+    "notes": "备注"
+  },
+  "bulk": {
+    "markComplete": "批量标记完成",
+    "copy": "复制到其他班级",
+    "copyTitle": "选择目标班级",
+    "confirm": "确认复制",
+    "selectTargets": "选择要复制到的班级"
+  },
+  "templates": {
+    "title": "课程计划模板",
+    "empty": "暂无模板",
+    "createFromTemplate": "从模板创建",
+    "saveAsTemplate": "存为模板",
+    "searchPlaceholder": "搜索班级 / 学科 / 教师",
+    "confirm": "确认创建",
+    "cancel": "取消",
+    "cloning": "正在创建...",
+    "cloneSuccess": "已从模板创建课程计划",
+    "cloneFailed": "从模板创建失败",
+    "selectTemplateFirst": "请先选择一个模板",
+    "noTargetClass": "请先选择目标班级"
+  },
+  "loading": {
+    "title": "加载中...",
+    "description": "正在加载课程计划数据..."
   }
-}
+}