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/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"