Add types to StackWithBorder & TeamMember; fix all frontend typecheck errors

[Copilot]

The frontend had untyped component props and several type errors causing yarn run frontend::typecheck to fail.

Types added

• StackWithBorder — new StackWithBorderProps interface with text?, tooltip?, and children? as optional:

  interface StackWithBorderProps {
    text?: string;
    tooltip?: string;
    children?: React.ReactNode;
  }

• TeamMember / TeamMemberRequest — typed with TeamResponseDTO, UserListDto, and explicit callback signatures

Type errors fixed

• TS2345 (edit-team.tsx): updateTeam was called with a spread TeamResponseDTO which is incompatible with TeamDTO (owner: UserResponseDto vs UserDTO). Changed the API method to accept TeamUpdateDTO and the call site to pass only { id, title, description, teamImg }.
• TS2554 (api/index.ts): delete() accepts 1 argument but removeUserFromTeam was passing a spurious {} as never second arg.
• TS6133 (edit-team.tsx): Removed unused TextField and Stack imports.
• TS6133 (rating-form.tsx): Removed unused Tooltip import.