style(desktop): unify Input/Textarea/SelectTrigger on shared controlVariants

Mirror the buttonVariants exercise for non-composer form controls: add a
single controlVariants source of truth (2.5px radius, 12px text,
padding-driven sizing, chrome via desktop-input-chrome) and consume it from
Input, Textarea, and SelectTrigger. Drop per-call radius/height/font
overrides that fought the shared look.

apps/desktop/src/components/ui/control.ts

@@ -0,0 +1,24 @@
+import { cva, type VariantProps } from 'class-variance-authority'
+
+// Single source of truth for non-composer form-control chrome — Input,
+// Textarea, and SelectTrigger all consume this. Mirrors `buttonVariants`:
+// 2.5px radius, 12px text, padding-driven sizing (no fixed heights). The visual
+// chrome (background, border tint, hover, focus glow, invalid state) comes from
+// the `desktop-input-chrome` CSS so every control shares one exact look.
+export const controlVariants = cva(
+  'desktop-input-chrome w-full min-w-0 rounded-[2.5px] border text-xs leading-4 text-foreground outline-none placeholder:text-muted-foreground disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50',
+  {
+    variants: {
+      size: {
+        sm: 'px-2 py-1',
+        default: 'px-2.5 py-1.5',
+        lg: 'px-3 py-2 text-sm leading-5'
+      }
+    },
+    defaultVariants: {
+      size: 'default'
+    }
+  }
+)
+
+export type ControlVariantProps = VariantProps<typeof controlVariants>

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

@@ -2,11 +2,19 @@ import * as React from 'react'
 
 import { cn } from '@/lib/utils'
 
-function Input({ className, type, ...props }: React.ComponentProps<'input'>) {
+import { type ControlVariantProps, controlVariants } from './control'
+
+function Input({
+  className,
+  type,
+  size,
+  ...props
+}: Omit<React.ComponentProps<'input'>, 'size'> & ControlVariantProps) {
   return (
     <input
       className={cn(
-        'desktop-input-chrome h-9 w-full min-w-0 rounded-md border px-3 py-1 text-base outline-none selection:bg-primary selection:text-primary-foreground file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 md:text-sm',
+        controlVariants({ size }),
+        'selection:bg-primary selection:text-primary-foreground file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-xs file:font-medium file:text-foreground',
         className
       )}
       data-slot="input"

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

@@ -2,17 +2,24 @@ import { Select as SelectPrimitive } from 'radix-ui'
 import * as React from 'react'
 
 import { Codicon } from '@/components/ui/codicon'
+import { type ControlVariantProps, controlVariants } from '@/components/ui/control'
 import { cn } from '@/lib/utils'
 
 function Select({ ...props }: React.ComponentProps<typeof SelectPrimitive.Root>) {
   return <SelectPrimitive.Root data-slot="select" {...props} />
 }
 
-function SelectTrigger({ className, children, ...props }: React.ComponentProps<typeof SelectPrimitive.Trigger>) {
+function SelectTrigger({
+  className,
+  children,
+  size,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Trigger> & ControlVariantProps) {
   return (
     <SelectPrimitive.Trigger
       className={cn(
-        'flex h-8 w-full items-center justify-between gap-2 rounded-lg border border-input bg-background px-3 py-2 text-sm whitespace-nowrap shadow-xs outline-none transition-[color,box-shadow] focus-visible:border-ring focus-visible:ring-[0.1875rem] focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50 data-placeholder:text-muted-foreground [&_svg]:pointer-events-none [&_svg]:shrink-0',
+        controlVariants({ size }),
+        'flex items-center justify-between gap-2 whitespace-nowrap data-placeholder:text-muted-foreground [&_svg]:pointer-events-none [&_svg]:shrink-0',
         className
       )}
       data-slot="select-trigger"
@@ -66,7 +73,7 @@ function SelectItem({ className, children, ...props }: React.ComponentProps<type
   return (
     <SelectPrimitive.Item
       className={cn(
-        'relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-sm outline-none select-none focus:bg-accent focus:text-accent-foreground data-disabled:pointer-events-none data-disabled:opacity-50',
+        'relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-xs outline-none select-none focus:bg-accent focus:text-accent-foreground data-disabled:pointer-events-none data-disabled:opacity-50',
         className
       )}
       data-slot="select-item"

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

@@ -2,13 +2,12 @@ import * as React from 'react'
 
 import { cn } from '@/lib/utils'
 
-function Textarea({ className, ...props }: React.ComponentProps<'textarea'>) {
+import { type ControlVariantProps, controlVariants } from './control'
+
+function Textarea({ className, size, ...props }: React.ComponentProps<'textarea'> & ControlVariantProps) {
   return (
     <textarea
-      className={cn(
-        'desktop-input-chrome min-h-16 w-full rounded-md border px-3 py-2 text-sm outline-none placeholder:text-muted-foreground disabled:cursor-not-allowed disabled:opacity-50',
-        className
-      )}
+      className={cn(controlVariants({ size }), 'min-h-16', className)}
       data-slot="textarea"
       {...props}
     />