feat: de-mui the <UserGroupsCell /> component (#24277)

This pull-request takes the `<UserGroupsCell />` component and removes
out the `@mui/material/List`/`@mui/material/ListItem` dependencies. One
step closer to being a mui-free codebase.

<img width="364" height="309" alt="image"
src="https://github.com/user-attachments/assets/999995ef-88b6-4e54-834a-aa03c1274da0"
/>

site/src/pages/UsersPage/UsersTable/UserGroupsCell.tsx

@@ -1,18 +1,13 @@
-import { useTheme } from "@emotion/react";
-import List from "@mui/material/List";
-import ListItem from "@mui/material/ListItem";
 import { UsersIcon } from "lucide-react";
 import type { FC } from "react";
 import type { Group } from "#/api/typesGenerated";
 import { Avatar } from "#/components/Avatar/Avatar";
-import { OverflowY } from "#/components/OverflowY/OverflowY";
-import { TableCell } from "#/components/Table/Table";
 import {
-	Tooltip,
-	TooltipContent,
-	TooltipProvider,
-	TooltipTrigger,
-} from "#/components/Tooltip/Tooltip";
+	Popover,
+	PopoverContent,
+	PopoverTrigger,
+} from "#/components/Popover/Popover";
+import { TableCell } from "#/components/Table/Table";
 import { cn } from "#/utils/cn";
 
 type GroupsCellProps = {
@@ -20,69 +15,66 @@ type GroupsCellProps = {
 };
 
 export const UserGroupsCell: FC<GroupsCellProps> = ({ userGroups }) => {
-	const theme = useTheme();
-
 	return (
 		<TableCell>
 			{userGroups === undefined ? (
 				<span>No groups</span>
 			) : (
-				<TooltipProvider>
-					<Tooltip delayDuration={0}>
-						<TooltipTrigger asChild>
-							<button
-								className="cursor-pointer bg-transparent border-0 p-0 text-inherit leading-none"
-								type="button"
-							>
-								<div className="flex flex-row gap-2 items-center">
-									<UsersIcon
-										className={cn([
-											"size-4 opacity-50",
-											userGroups.length > 0 && "opacity-80",
-										])}
-									/>
+				<Popover>
+					<PopoverTrigger asChild>
+						<button
+							type="button"
+							className="cursor-pointer bg-transparent border-0 p-0 text-inherit leading-none"
+							aria-label={
+								userGroups.length === 0
+									? "No groups"
+									: `View ${userGroups.length} group${userGroups.length !== 1 ? "s" : ""}`
+							}
+						>
+							<div className="flex flex-row gap-2 items-center">
+								<UsersIcon
+									className={cn([
+										"size-4 opacity-50",
+										userGroups.length > 0 && "opacity-80",
+									])}
+								/>
 
-									<span>
-										{userGroups.length} Group{userGroups.length !== 1 && "s"}
-									</span>
-								</div>
-							</button>
-						</TooltipTrigger>
+								<span>
+									{userGroups.length} Group{userGroups.length !== 1 && "s"}
+								</span>
+							</div>
+						</button>
+					</PopoverTrigger>
 
-						<TooltipContent className="p-0 bg-surface-secondary border-surface-quaternary text-content-primary">
-							<OverflowY maxHeight={400}>
-								<List
-									component="ul"
-									className="flex flex-col flex-nowrap gap-0 px-0.5 py-1"
-									style={{
-										fontSize: theme.typography.body2.fontSize,
-									}}
-								>
-									{userGroups.map((group) => {
-										const groupName = group.display_name || group.name;
-										return (
-											<ListItem
-												key={group.id}
-												className="gap-x-[10px] items-center"
-											>
-												<Avatar
-													size="sm"
-													variant="icon"
-													src={group.avatar_url}
-													fallback={groupName}
-												/>
+					<PopoverContent
+						align="start"
+						sideOffset={8}
+						className="w-auto min-w-[240px] max-w-sm max-h-[400px] p-0"
+					>
+						<ul className="m-0 list-none flex flex-col flex-nowrap gap-0 px-0.5 py-1 text-sm">
+							{userGroups.map((group) => {
+								const groupName = group.display_name || group.name;
+								return (
+									<li
+										key={group.id}
+										className="flex gap-x-[10px] items-center px-2 py-1.5"
+									>
+										<Avatar
+											size="sm"
+											variant="icon"
+											src={group.avatar_url}
+											fallback={groupName}
+										/>
 
-												<span className="whitespace-nowrap text-ellipsis overflow-hidden leading-none m-0">
-													{groupName || <em>N/A</em>}
-												</span>
-											</ListItem>
-										);
-									})}
-								</List>
-							</OverflowY>
-						</TooltipContent>
-					</Tooltip>
-				</TooltipProvider>
+										<span className="m-0 min-w-0 overflow-hidden text-ellipsis whitespace-nowrap leading-none">
+											{groupName || <em>N/A</em>}
+										</span>
+									</li>
+								);
+							})}
+						</ul>
+					</PopoverContent>
+				</Popover>
 			)}
 		</TableCell>
 	);