feat: add copy user ID menu item and rename copy link to copy direct link

Add 'Copy user ID' button to both desktop and mobile post menus, allowing users to copy the full author address. This provides a way to verify authenticity against the 8-char display ID. Also rename 'Copy link' to 'Copy direct link' for clarity. Update security comments to reflect the new approach and add translations for all 35 languages.

public/translations/ur/default.json

@@ -99,7 +99,6 @@
   "interface": "انٹرفیس",
   "invalid_url": "غیر درست یو آر ایل",
   "image_search": "تصویر کی تلاش",
-  "copy_link": "لنک کاپی کریں",
   "hide_post": "پوسٹ چھپائیں",
   "hide_thread": "دھاگہ چھپائیں",
   "unhide_post": "پوسٹ دکھائیں",
@@ -276,5 +275,7 @@
   "type": "Type",
   "yes": "Yes",
   "no": "No",
-  "pending_mod_approval": "Pending mod approval, not visible to users"
+  "pending_mod_approval": "Pending mod approval, not visible to users",
+  "copy_user_id": "صارف کی شناخت کاپی کریں",
+  "copy_direct_link": "براہ راست لنک کاپی کریں"
 }