style(desktop): shared Badge component; tidy profile metadata

Add a proper shadcn-style Badge (CVA tones, app radius — not a full pill)
and use it for the Default/.env tags instead of bespoke rounded-full spans.
Drop the oversized text-sm metadata values to text-xs.

apps/desktop/src/app/profiles/index.tsx

@@ -1,6 +1,7 @@
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 
 import { PageLoader } from '@/components/page-loader'
+import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
 import { Codicon } from '@/components/ui/codicon'
 import {
@@ -282,16 +283,8 @@ function ProfileDetail({
               <div className="min-w-0">
                 <div className="flex flex-wrap items-center gap-2">
                   <h3 className="text-xl font-semibold tracking-tight">{profile.name}</h3>
-                  {profile.is_default && (
-                    <span className="rounded-full bg-primary/10 px-2 py-0.5 text-[0.65rem] font-medium text-primary">
-                      Default
-                    </span>
-                  )}
-                  {profile.has_env && (
-                    <span className="rounded-full bg-muted px-2 py-0.5 text-[0.65rem] font-medium text-muted-foreground">
-                      .env
-                    </span>
-                  )}
+                  {profile.is_default && <Badge>Default</Badge>}
+                  {profile.has_env && <Badge variant="muted">.env</Badge>}
                 </div>
                 <p className="mt-1 font-mono text-[0.7rem] text-muted-foreground" title={profile.path}>
                   {profile.path}
@@ -358,7 +351,7 @@ function DetailRow({ children, label }: { children: React.ReactNode; label: stri
   return (
     <div className="flex flex-wrap items-baseline gap-2">
       <dt className="text-[0.65rem] font-semibold uppercase tracking-[0.12em] text-muted-foreground">{label}</dt>
-      <dd className="text-sm text-foreground">{children}</dd>
+      <dd className="text-xs text-foreground">{children}</dd>
     </div>
   )
 }

apps/desktop/src/components/ui/badge.tsx

@@ -0,0 +1,34 @@
+import { cva, type VariantProps } from 'class-variance-authority'
+import { Slot } from 'radix-ui'
+import type * as React from 'react'
+
+import { cn } from '@/lib/utils'
+
+// Small status/metadata tag. App radius (not a full pill); tones map to the
+// shared accent/muted/destructive surfaces so badges read consistently.
+const badgeVariants = cva(
+  'inline-flex w-fit shrink-0 items-center gap-1 rounded-[3px] px-1.5 py-0.5 text-[0.65rem] font-medium leading-none whitespace-nowrap [&_svg]:size-3 [&_svg]:pointer-events-none',
+  {
+    variants: {
+      variant: {
+        default: 'bg-primary/10 text-primary',
+        muted: 'bg-muted text-muted-foreground',
+        destructive: 'bg-destructive/10 text-destructive',
+        outline: 'border border-(--ui-stroke-secondary) text-muted-foreground'
+      }
+    },
+    defaultVariants: { variant: 'default' }
+  }
+)
+
+export interface BadgeProps extends React.ComponentProps<'span'>, VariantProps<typeof badgeVariants> {
+  asChild?: boolean
+}
+
+export function Badge({ asChild = false, className, variant, ...props }: BadgeProps) {
+  const Comp = asChild ? Slot.Root : 'span'
+
+  return <Comp className={cn(badgeVariants({ variant }), className)} data-slot="badge" {...props} />
+}
+
+export { badgeVariants }