refactor: migrate UI to Tailwind and unify chat with shadcn

src/components/ui/input.tsx

@@ -2,13 +2,20 @@ import { Input as InputPrimitive } from "@base-ui/react/input";
 import { cn } from "cn";
 import type * as React from "react";
 
-function Input({ className, type, ...props }: React.ComponentProps<"input">) {
+function Input({
+  className,
+  type,
+  variant = "default",
+  ...props
+}: React.ComponentProps<"input"> & { variant?: "default" | "measurement" }) {
   return (
     <InputPrimitive
       type={type}
       data-slot="input"
       className={cn(
         "h-8 w-full min-w-0 rounded-lg border border-input bg-transparent px-2.5 py-1 text-base transition-colors outline-none file:inline-flex file:h-6 file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:pointer-events-none disabled:cursor-not-allowed disabled:bg-input/50 disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 md:text-sm dark:bg-input/30 dark:disabled:bg-input/80 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40",
+        variant === "measurement" &&
+          "bg-background text-ui-20 tabular-nums md:text-ui-20 dark:bg-background",
         className,
       )}
       {...props}