refactor(grades,diagnostic): 成绩和学情诊断模块审计修复

P0-1: 10 个页面补充 requirePermission 权限校验
P0-2: diagnostic/data-access-reports.ts 移除直查 users 表，改用 getUserNamesByIds
P0-3: 新增 grade/grades/diagnostic 三组 i18n 翻译文件（zh-CN/en）
P0-4: 新增 /management/grade 重定向页面

P1-2: 抽取 toNumber/normalize/buildScopeClassFilter 到 lib/grade-utils.ts
P1-3: 为 12 个 Action 新增 Zod safeParse 校验（schema.ts +12 查询 schema）
P1-4: 修复 as 断言违规，改用类型守卫函数

P2-2: 移除 diagnostic 组件中 Tailwind 任意值

同步更新架构图文档 004 和 005

src/shared/i18n/messages/zh-CN/grades.json

@@ -0,0 +1,143 @@
+{
+  "title": {
+    "list": "成绩查询",
+    "entry": "成绩录入",
+    "analytics": "成绩分析",
+    "stats": "成绩统计",
+    "myGrades": "我的成绩",
+    "childrenGrades": "子女成绩"
+  },
+  "filters": {
+    "class": "班级",
+    "subject": "科目",
+    "type": "类型",
+    "semester": "学期",
+    "allClasses": "全部班级",
+    "allSubjects": "全部科目",
+    "allTypes": "全部类型",
+    "allSemesters": "全部学期",
+    "searchPlaceholder": "按标题搜索..."
+  },
+  "type": {
+    "exam": "考试",
+    "quiz": "测验",
+    "homework": "作业",
+    "other": "其他"
+  },
+  "semester": {
+    "s1": "第一学期",
+    "s2": "第二学期"
+  },
+  "list": {
+    "empty": "暂无成绩记录",
+    "columns": {
+      "student": "学生",
+      "class": "班级",
+      "subject": "科目",
+      "title": "标题",
+      "score": "分数",
+      "type": "类型",
+      "semester": "学期",
+      "recordedBy": "录入人",
+      "date": "日期"
+    }
+  },
+  "form": {
+    "title": "录入成绩",
+    "save": "保存",
+    "saving": "保存中...",
+    "cancel": "取消",
+    "selectClass": "选择班级",
+    "selectSubject": "选择科目",
+    "selectStudent": "选择学生",
+    "titlePlaceholder": "如期中考试",
+    "score": "分数",
+    "fullScore": "满分",
+    "remark": "备注（可选）",
+    "remarkPlaceholder": "关于此成绩的备注...",
+    "selectPrompt": "请选择班级、科目和学生"
+  },
+  "delete": {
+    "title": "删除成绩记录",
+    "confirmation": "确定要删除此成绩记录吗？此操作不可撤销。",
+    "confirm": "删除",
+    "cancel": "取消",
+    "deleting": "删除中..."
+  },
+  "export": {
+    "detail": "导出成绩明细",
+    "classReport": "导出班级成绩总表",
+    "success": "导出成功",
+    "failed": "导出失败"
+  },
+  "stats": {
+    "title": "统计",
+    "average": "平均分",
+    "median": "中位数",
+    "max": "最高分",
+    "min": "最低分",
+    "stdDev": "标准差",
+    "variance": "方差",
+    "passRate": "及格率",
+    "excellentRate": "优秀率",
+    "count": "人数"
+  },
+  "analytics": {
+    "trend": "成绩趋势",
+    "classComparison": "班级对比",
+    "subjectComparison": "科目对比",
+    "distribution": "分数分布",
+    "ranking": "排名",
+    "rankingTrend": "排名趋势",
+    "class": "班级",
+    "subject": "科目",
+    "grade": "年级",
+    "averageScore": "平均分",
+    "passRate": "及格率",
+    "excellentRate": "优秀率",
+    "studentCount": "学生数"
+  },
+  "batch": {
+    "title": "批量录入",
+    "saving": "保存中...",
+    "restored": "已恢复未保存的成绩草稿",
+    "invalidScores": "存在无效分数",
+    "fullScoreRequired": "满分必填",
+    "saved": "已录入",
+    "score": "分数",
+    "remark": "备注",
+    "fullScore": "满分",
+    "type": "类型",
+    "saveAll": "全部保存",
+    "cancel": "取消"
+  },
+  "trend": {
+    "title": "成绩趋势",
+    "empty": "暂无成绩记录",
+    "score": "分数",
+    "date": "日期"
+  },
+  "summary": {
+    "title": "成绩摘要",
+    "averageScore": "平均分",
+    "classRank": "班级排名",
+    "totalRecords": "总记录数",
+    "highestScore": "最高分",
+    "lowestScore": "最低分"
+  },
+  "empty": {
+    "noRecords": "暂无成绩记录",
+    "noData": "暂无数据",
+    "noClassSelected": "请选择班级",
+    "noStudentSelected": "请选择学生"
+  },
+  "error": {
+    "loadFailed": "加载失败",
+    "saveFailed": "保存失败",
+    "deleteFailed": "删除失败",
+    "exportFailed": "导出失败",
+    "failedToCreate": "创建失败",
+    "failedToDelete": "删除失败",
+    "retry": "重试"
+  }
+}