fix(i18n): complete tasks and documents translations for all 15 locales

Add missing tasks.statusArchived, archiveButton, archivedToast,
kanbanArchived, reminderNeedsDueDate and translate the documents
section from English placeholders into all supported languages.

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

public/locales/ar.json

@@ -180,7 +180,12 @@
     "filterGroupPriority": "الأولوية",
     "filterGroupStatus": "الحالة",
     "swipedDoneToast": "تم وضع علامة مكتمل.",
-    "swipedOpenToast": "تم وضع علامة مفتوح."
+    "swipedOpenToast": "تم وضع علامة مفتوح.",
+    "statusArchived": "مؤرشف",
+    "archiveButton": "أرشفة المهمة",
+    "archivedToast": "تم أرشفة المهمة.",
+    "kanbanArchived": "مؤرشف",
+    "reminderNeedsDueDate": "حدّد تاريخ استحقاق لتفعيل تذكيرات المهمة."
   },
   "shopping": {
     "title": "التسوق",
@@ -903,38 +908,38 @@
     "title": "المستندات",
     "addButton": "إضافة مستند",
     "searchPlaceholder": "البحث في المستندات...",
-    "gridView": "Grid view",
-    "listView": "List view",
-    "viewToggle": "Document view",
+    "gridView": "عرض شبكي",
+    "listView": "عرض قائمة",
+    "viewToggle": "عرض المستندات",
     "allCategories": "كل الفئات",
     "emptyTitle": "لا توجد مستندات بعد",
     "emptyDescription": "ارفع مستندات العائلة وتحكم في من يمكنه رؤية كل ملف.",
     "newTitle": "مستند جديد",
     "editTitle": "إعدادات المستند",
-    "nameLabel": "Name",
-    "descriptionLabel": "Description",
-    "categoryLabel": "Category",
-    "fileLabel": "File",
-    "fileHint": "PDF, images, text and Office files up to 5 MB.",
-    "visibilityLabel": "Visibility",
-    "statusLabel": "Status",
-    "allowedMembersLabel": "Allowed members",
-    "uploadAction": "Upload",
-    "downloadAction": "Download",
-    "editAction": "Settings",
-    "archiveAction": "Archive",
-    "restoreAction": "Restore",
-    "savedToast": "Document saved.",
-    "uploadedToast": "Document uploaded.",
-    "archivedToast": "Document archived.",
-    "restoredToast": "Document restored.",
-    "deletedToast": "Document deleted.",
-    "deleteConfirm": "Delete document \"{{name}}\"?",
-    "fileRequired": "Select a file to upload.",
-    "fileTooLarge": "File may be at most 5 MB.",
-    "fileReadError": "File could not be read.",
-    "statusActive": "Active",
-    "statusArchived": "Archived",
+    "nameLabel": "الاسم",
+    "descriptionLabel": "الوصف",
+    "categoryLabel": "الفئة",
+    "fileLabel": "الملف",
+    "fileHint": "ملفات PDF والصور والنصوص وملفات Office حتى 5 ميغابايت.",
+    "visibilityLabel": "مستوى الرؤية",
+    "statusLabel": "الحالة",
+    "allowedMembersLabel": "الأعضاء المسموح لهم",
+    "uploadAction": "رفع",
+    "downloadAction": "تحميل",
+    "editAction": "إعدادات",
+    "archiveAction": "أرشفة",
+    "restoreAction": "استعادة",
+    "savedToast": "تم حفظ المستند.",
+    "uploadedToast": "تم رفع المستند.",
+    "archivedToast": "تم أرشفة المستند.",
+    "restoredToast": "تم استعادة المستند.",
+    "deletedToast": "تم حذف المستند.",
+    "deleteConfirm": "حذف المستند \"{{name}}\"؟",
+    "fileRequired": "يرجى اختيار ملف للرفع.",
+    "fileTooLarge": "يجب ألا يتجاوز حجم الملف 5 ميغابايت.",
+    "fileReadError": "تعذّر قراءة الملف.",
+    "statusActive": "نشط",
+    "statusArchived": "مؤرشف",
     "visibility": {
       "family": "كل العائلة",
       "restricted": "أعضاء محددون",