🎨 fix(theme): align UI controls with global radius tokens

Remove hard-coded and capped border radius overrides so shared controls and feature actions consistently follow the active theme radius.

- Replace fixed radius utilities with semantic theme-aware radius tokens
- Remove redundant `rounded-full` and pixel-based overrides from header, toolbar, Playground, and utility actions
- Drop unused `StatusBadge` rounded prop usage
- Keep existing component behavior intact while improving global theme consistency

web/default/src/features/channels/components/channels-columns.tsx

@@ -637,7 +637,7 @@ export function useChannelsColumns(): ColumnDef<Channel>[] {
                   <Tooltip>
                     <TooltipTrigger
                       render={
-                        <span className='border-border bg-muted text-primary inline-flex h-6 w-6 items-center justify-center rounded-full border' />
+                        <span className='border-border bg-muted text-primary inline-flex h-6 w-6 items-center justify-center rounded-md border' />
                       }
                     >
                       <MultiKeyModeIcon className='h-3.5 w-3.5' />