The «عملیات» dropdown was absolutely positioned inside the table container,
which has overflow:hidden for its rounded corners, so the menu was clipped
below the table. Render it through a Portal with fixed positioning computed
from the trigger's rect (RTL-aligned to the trigger's right edge), tracking
scroll/resize while open.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>