feat(i18n): add new i18n message files and update request config

- Add new i18n message files: audit, course-plans, files, leave, nav, practice, scheduling, student, users

- Update existing i18n messages: ai, attendance, common, diagnostic, elective, error-book, exam-homework, grades, lesson-preparation, school, settings

- Update i18n request config for new locale handling

src/shared/i18n/messages/en/error-book.json

@@ -76,11 +76,33 @@
   "parent": {
     "title": "Child Error Book",
     "description": "View your child's error statistics and learning progress",
-    "noChild": "No children linked"
+    "noChild": "No children linked",
+    "noChildDesc": "Your account is not linked to any children yet. Please contact the school administrator.",
+    "unknown": "Unknown",
+    "totalErrors": "Total Errors",
+    "dueReview": "Due Review",
+    "newItems": "New",
+    "mastered": "Mastered",
+    "mastery": "{rate}% Mastery",
+    "weakPoints": "Weak Knowledge Points",
+    "errorsAndMastery": "{count} errors \u00b7 {rate}% mastery"
   },
   "admin": {
     "title": "School-wide Error Analysis",
-    "description": "School-wide error statistics and weak point analysis"
+    "description": "School-wide error statistics and weak point analysis",
+    "description2": "View school-wide error statistics and weak knowledge points by subject.",
+    "noPermissionTitle": "Insufficient Permissions",
+    "noPermissionDescription": "You do not have permission to view school-wide error analysis data.",
+    "noStudentsTitle": "No Student Data",
+    "noStudentsDescription": "No student users in the system. Unable to display error analysis.",
+    "topStudents": "Top 50 Students with Most Errors",
+    "studentsWithErrors": "{count} students with errors",
+    "noChapterDataTitle": "No Chapter Error Data",
+    "noChapterDataDescription": "Knowledge points have not been linked to chapters. Unable to display chapter-level statistics.",
+    "noKnowledgePointDataTitle": "No Knowledge Point Data",
+    "noKnowledgePointDataDescription": "Errors have not been linked to knowledge points. Unable to display weak point statistics.",
+    "noStudentErrorsTitle": "No Student Errors",
+    "noStudentErrorsDescription": "No student error data for the selected subject."
   },
   "messages": {
     "added": "Error added",