feat(frontend): add Copy Token ID action to api-tokens row dropdown

Mirrors the entry already present in the right-click context menu so
both menus expose the same set of actions (Edit / Copy Token ID /
Delete) — the dropdown was previously missing the copy shortcut.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/pages/settings/settings-api-tokens.tsx

@@ -781,6 +781,10 @@ function SettingsAPITokens() {
                                         <Pencil />
                                         Edit
                                     </DropdownMenuItem>
+                                    <DropdownMenuItem onClick={() => handleCopyTokenId(token.tokenId)}>
+                                        <Copy />
+                                        Copy Token ID
+                                    </DropdownMenuItem>
                                     <DropdownMenuSeparator />
                                     <DropdownMenuItem
                                         disabled={isDeleteLoading && deletingToken?.tokenId === token.tokenId}