fix: add missing i18n keys for issues modal tabs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/i18n/ar.json

@@ -510,6 +510,9 @@
   "settings.saved": "تم حفظ الإعدادات!",
   "tasks.maxFileSize": "الحد الأقصى: {size} ميجابايت",
   "tasks.fileTooLarge": "الملف \"{name}\" كبير جداً ({size} ميجابايت). الحد المسموح: {max} ميجابايت.",
+  "issues.details": "التفاصيل",
+  "issues.actions": "الإجراءات",
+  "issues.updates": "التحديثات",
   "issues.board": "لوحة",
   "issues.list": "قائمة",
   "issues.statusUpdated": "تم تحديث حالة المشكلة!",

client/src/i18n/en.json

@@ -510,6 +510,9 @@
   "settings.saved": "Settings saved!",
   "tasks.maxFileSize": "Max file size: {size} MB",
   "tasks.fileTooLarge": "File \"{name}\" is too large ({size} MB). Maximum allowed: {max} MB.",
+  "issues.details": "Details",
+  "issues.actions": "Actions",
+  "issues.updates": "Updates",
   "issues.board": "Board",
   "issues.list": "List",
   "issues.statusUpdated": "Issue status updated!",