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/diagnostic.json

@@ -0,0 +1,87 @@
+{
+  "title": {
+    "student": "学生学情诊断",
+    "class": "班级学情诊断",
+    "reportList": "诊断报告",
+    "myDiagnostic": "我的学情诊断"
+  },
+  "type": {
+    "individual": "个人",
+    "class": "班级",
+    "grade": "年级"
+  },
+  "status": {
+    "draft": "草稿",
+    "published": "已发布",
+    "archived": "已归档"
+  },
+  "filters": {
+    "reportType": "报告类型",
+    "status": "状态",
+    "allTypes": "全部类型",
+    "allStatuses": "全部状态"
+  },
+  "summary": {
+    "overallMastery": "总体掌握度",
+    "strengths": "强项",
+    "weaknesses": "弱项",
+    "students": "学生数",
+    "avgMastery": "平均掌握度",
+    "needAttention": "需重点关注",
+    "class": "班级",
+    "student": "学生"
+  },
+  "chart": {
+    "radarTitle": "知识点掌握度",
+    "radarDescription": "掌握度雷达图（学生 vs 班级平均）",
+    "heatmapTitle": "知识点掌握度热力图",
+    "rankingTitle": "知识点排名",
+    "noMasteryData": "暂无知识点掌握度记录"
+  },
+  "report": {
+    "generate": "生成诊断报告",
+    "generateStudent": "生成学生诊断报告",
+    "generateClass": "生成班级诊断报告",
+    "publish": "发布",
+    "delete": "删除",
+    "publishTitle": "发布报告",
+    "publishConfirmation": "确定要发布此报告吗？发布后将对相关人员可见。",
+    "deleteTitle": "删除报告",
+    "deleteConfirmation": "确定要删除此报告吗？此操作不可撤销。",
+    "confirm": "确认",
+    "cancel": "取消",
+    "publishing": "发布中...",
+    "deleting": "删除中...",
+    "recommendations": "学习建议",
+    "history": "报告历史",
+    "period": "周期",
+    "createdAt": "创建时间",
+    "generatedBy": "生成者",
+    "overallScore": "总体得分",
+    "actions": "操作"
+  },
+  "strengths": {
+    "title": "强项（≥80%）",
+    "practice": "练习",
+    "empty": "暂无强项知识点"
+  },
+  "weaknesses": {
+    "title": "弱项（<60%）",
+    "practice": "练习",
+    "empty": "暂无弱项知识点"
+  },
+  "empty": {
+    "noData": "暂无诊断数据",
+    "noClassData": "无法加载班级掌握度摘要",
+    "noMastery": "暂无知识点掌握度记录",
+    "noReports": "暂无诊断报告"
+  },
+  "error": {
+    "generateFailed": "生成报告失败",
+    "generateClassFailed": "生成班级报告失败",
+    "publishFailed": "发布失败",
+    "deleteFailed": "删除失败",
+    "loadFailed": "加载失败",
+    "retry": "重试"
+  }
+}