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.

src/components/post-desktop/post-menu-desktop/post-menu-desktop.tsx

@@ -39,7 +39,7 @@ const CopyLinkButton = ({ cid, subplebbitAddress, linkType, onClose }: CopyLinkB
         }
       }}
     >
-      <div className={styles.postMenuItem}>{t('copy_link')}</div>
+      <div className={styles.postMenuItem}>{t('copy_direct_link')}</div>
     </div>
   );
 };
@@ -63,6 +63,25 @@ const CopyContentIdButton = ({ cid, onClose }: { cid: string; onClose: () => voi
   );
 };
 
+const CopyUserIdButton = ({ address, onClose }: { address: string; onClose: () => void }) => {
+  const { t } = useTranslation();
+  return (
+    <div
+      onClick={async () => {
+        try {
+          await copyToClipboard(address);
+        } catch (error) {
+          console.error('Failed to copy user id', error);
+        } finally {
+          onClose();
+        }
+      }}
+    >
+      <div className={styles.postMenuItem}>{t('copy_user_id')}</div>
+    </div>
+  );
+};
+
 const ImageSearchButton = ({ url, onClose }: { url: string; onClose: () => void }) => {
   const { t } = useTranslation();
   const [isImageSearchMenuOpen, setIsImageSearchMenuOpen] = useState(false);
@@ -178,6 +197,7 @@ const PostMenuDesktop = ({ postMenu }: PostMenuDesktopProps) => {
             <div className={styles.postMenu} ref={refs.setFloating} style={floatingStyles} aria-labelledby={headingId} {...getFloatingProps()}>
               {cid && subplebbitAddress && <CopyLinkButton cid={cid} subplebbitAddress={subplebbitAddress} linkType='thread' onClose={handleClose} />}
               {cid && <CopyContentIdButton cid={cid} onClose={handleClose} />}
+              {authorAddress && <CopyUserIdButton address={authorAddress} onClose={handleClose} />}
               {!(isInPostPageView && postCid === cid) && (
                 <div
                   className={styles.postMenuItem}