feat(shared): add UI components, hooks, form fields, and action utils

- Add UI components: confirm-delete-dialog, empty-table-row, list-pagination, pagination, status-badge

- Add form-fields directory for reusable form field components

- Add hooks: use-action-mutation, use-action-query for server action integration

- Add action-utils lib for action state helpers

- Update a11y components, charts, global-search, onboarding-gate, question components

- Update UI components: chip-nav, filter-bar, page-header, stat-card, stat-item, switch, table

- Update hooks: use-action-with-toast, use-aria-live, use-debounce, use-local-storage, use-media-query, use-permission

- Update lib: a11y, ai, audit-logger, auth-guard, bcrypt-utils, change-logger, download, excel, file-storage, http-utils, login-logger, password-policy, password-security-service, permissions, rate-limit, role-utils, search-params, session, storage-provider

- Update types: action-state, permissions

- Update i18n messages (en, zh-CN) for dashboard, diagnostic, grades, lesson-preparation, settings

src/shared/i18n/messages/en/diagnostic.json

@@ -34,9 +34,17 @@
   "chart": {
     "radarTitle": "Knowledge Point Mastery",
     "radarDescription": "Radar chart of mastery level (student vs class average)",
+    "radarDescriptionNonEmpty": "Radar chart of mastery level (0-100) across knowledge points.",
     "heatmapTitle": "Knowledge Point Mastery Heatmap",
     "rankingTitle": "Knowledge Point Ranking",
-    "noMasteryData": "No knowledge point mastery records found."
+    "noMasteryData": "No knowledge point mastery records found.",
+    "noMasteryDataForStudent": "No knowledge point mastery records found for this student.",
+    "radarEmptyTitle": "No mastery data",
+    "radarAriaLabelEmpty": "Knowledge point mastery radar chart: no data",
+    "radarAriaLabelNonEmpty": "Knowledge point mastery radar chart: {count} knowledge points{withClassAverage}",
+    "withClassAverage": " (with class average comparison)",
+    "studentSeries": "Student",
+    "classAvgSeries": "Class Avg"
   },
   "report": {
     "generate": "Generate Diagnostic Report",
@@ -44,6 +52,7 @@
     "generateClass": "Generate Class Diagnostic Report",
     "publish": "Publish",
     "delete": "Delete",
+    "export": "Export",
     "publishTitle": "Publish Report",
     "publishConfirmation": "Are you sure you want to publish this report? It will be visible to relevant users.",
     "deleteTitle": "Delete Report",
@@ -82,6 +91,99 @@
     "publishFailed": "Failed to publish",
     "deleteFailed": "Failed to delete",
     "loadFailed": "Failed to load",
+    "exportFailed": "Export failed",
     "retry": "Retry"
+  },
+  "classDiagnostic": {
+    "noClassDataTitle": "No class data",
+    "heatmapDescription": "Average mastery level per knowledge point (green >=80%, yellow 60-79%, orange 40-59%, red <40%).",
+    "noKnowledgePointData": "No knowledge point data available.",
+    "heatmapAriaLabel": "Knowledge point mastery heatmap, {count} knowledge points. Color indicates mastery level: green >=80% excellent, yellow 60-79% good, orange 40-59% needs improvement, red <40% weak",
+    "masteryLevelExcellent": "Excellent",
+    "masteryLevelGood": "Good",
+    "masteryLevelNeedsImprovement": "Needs Improvement",
+    "masteryLevelWeak": "Weak",
+    "legendLabel": "Color Legend",
+    "noRankingData": "No data.",
+    "knowledgePointColumn": "Knowledge Point",
+    "avgMasteryColumn": "Avg Mastery",
+    "masteredColumn": "Mastered (≥80%)",
+    "notMasteredColumn": "Not Mastered (<60%)",
+    "studentsNeedingAttentionTitle": "Students Needing Attention (avg <60%)",
+    "studentsNeedingAttentionDescription": "Students with low overall mastery.",
+    "allStudentsAboveThreshold": "All students are above the attention threshold.",
+    "weakPointsColumn": "Weak Points",
+    "viewAction": "View",
+    "viewAriaLabel": "View {studentName}'s diagnostic details",
+    "filterByKpTitle": "Filter Students by Knowledge Point",
+    "filterByKpDescription": "Select a knowledge point to view all students' mastery levels for targeted tutoring.",
+    "kpFilterLabel": "Select knowledge point",
+    "kpFilterPlaceholder": "Select a knowledge point",
+    "kpFilterAll": "All knowledge points",
+    "filtering": "Filtering...",
+    "totalQuestionsColumn": "Total Questions",
+    "correctQuestionsColumn": "Correct",
+    "statusColumn": "Status",
+    "needsAttention": "Needs Attention",
+    "mastered": "Mastered",
+    "noStudentsForKp": "No mastery data available for this knowledge point.",
+    "generateDescription": "Generate a class-level diagnostic report with aggregated analysis.",
+    "periodLabel": "Period (YYYY-MM)",
+    "generating": "Generating...",
+    "generateButton": "Generate Class Report"
+  },
+  "reportList": {
+    "caption": "Diagnostic reports list",
+    "typeColumn": "Type",
+    "studentTargetColumn": "Student / Target",
+    "periodColumn": "Period",
+    "scoreColumn": "Score",
+    "statusColumn": "Status",
+    "generatedByColumn": "Generated By",
+    "dateColumn": "Date",
+    "actionsColumn": "Actions",
+    "classReportPlaceholder": "(Class report)",
+    "gradeReportPlaceholder": "(Grade report)",
+    "noReportsDescription": "Generate diagnostic reports to see them here.",
+    "publishConfirmation": "Once published, the report will be visible to students. Continue?",
+    "publishAriaLabel": "Publish report {studentName}",
+    "deleteAriaLabel": "Delete report {studentName}",
+    "exportAriaLabel": "Export report {studentName}",
+    "exportSuccess": "Report exported",
+    "share": "Share",
+    "shareAriaLabel": "Share report {studentName}",
+    "shareTitle": "Share Report",
+    "shareDescription": "Copy the report link to share with students or parents.",
+    "shareLinkLabel": "Report Link",
+    "copyLink": "Copy Link",
+    "copyLinkSuccess": "Link copied",
+    "copyLinkFailed": "Failed to copy link",
+    "shareLinkAriaLabel": "Report share link",
+    "confidenceColumn": "Confidence",
+    "confidenceHigh": "High",
+    "confidenceMedium": "Medium",
+    "confidenceLow": "Low",
+    "confidenceInsufficient": "Insufficient Data",
+    "confidenceHighHint": "Sufficient data, conclusions are reliable",
+    "confidenceMediumHint": "Limited data, consider with other information",
+    "confidenceLowHint": "Little data, conclusions are for reference only",
+    "confidenceAriaLabel": "Data confidence: {level}"
+  },
+  "studentDiagnostic": {
+    "noDataDescription": "Unable to load student mastery data.",
+    "strengthsDescription": "Knowledge points with high mastery.",
+    "weaknessesDescription": "Knowledge points needing attention.",
+    "diagnosticReportTitle": "Diagnostic Report",
+    "overallLabel": "Overall",
+    "historyDescription": "Past diagnostic reports (newest first).",
+    "untitledPeriod": "Untitled period",
+    "strengthsListAriaLabel": "Strengths knowledge points list",
+    "weaknessesListAriaLabel": "Weaknesses knowledge points list",
+    "recommendationsListAriaLabel": "Recommendations list",
+    "practiceAriaLabel": "Practice knowledge point: {name}",
+    "noStrengths": "No strengths identified yet.",
+    "noWeaknesses": "No weaknesses identified.",
+    "reportMeta": "Period: {period} · Overall: {score}%",
+    "historyReportMeta": "{date} · Overall: {score}%"
   }
 }