Fix TypeScript errors and add Input component for assistant saving

frontend/src/components/ui/input.tsx

@@ -0,0 +1,25 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+export interface InputProps
+  extends React.InputHTMLAttributes<HTMLInputElement> {}
+
+const Input = React.forwardRef<HTMLInputElement, InputProps>(
+  ({ className, type, ...props }, ref) => {
+    return (
+      <input
+        type={type}
+        className={cn(
+          "flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Input.displayName = "Input"
+
+export { Input }

frontend/src/pages/Playground.tsx

@@ -856,7 +856,7 @@ export function Playground() {
               <Input
                 id="assistant-name"
                 value={assistantName}
-                onChange={(e) => setAssistantName(e.target.value)}
+                onChange={(e: React.ChangeEvent<HTMLInputElement>) => setAssistantName(e.target.value)}
                 placeholder="e.g., Code Review Expert"
                 className="mt-1"
               />
@@ -866,7 +866,7 @@ export function Playground() {
               <Textarea
                 id="assistant-description"
                 value={assistantDescription}
-                onChange={(e) => setAssistantDescription(e.target.value)}
+                onChange={(e: React.ChangeEvent<HTMLTextAreaElement>) => setAssistantDescription(e.target.value)}
                 placeholder="Describe what this assistant is good at..."
                 rows={3}
                 className="mt-1"