Fix Open WebUI feedback rating scale truncation

Job description

Source issue: https://github.com/open webui/open webui/issues/26846 Bug summary: When multiple models are displayed in Open WebUI, the feedback component truncates the 1 10 rating scale after 6, preventing users from selecting ratings 7 through 10. This appears to be a UI layout or overflow bug. Scope: Reproduce the truncation issue described in the GitHub issue. Identify the frontend layout / overflow cause. Implement a fix so the full 1 10 scale remains usable when multiple models are shown. Verify behavior across the affected feedback popover path. Acceptance criteria: Ratings 1 through 10 are fully visible and selectable. The fix works when at least 3 models are displayed in the interface. Include a short implementation note with root cause, files changed, and verification steps. Prefer a PR ready patch or clean change set. Tech context: Likely fits TypeScript / React / frontend UI debugging work.