Implement server management enhancements with window close handling

- Introduced a checkbox in the ConnectionForm to allow users to keep the server running when the app closes.
- Added a setupWindowCloseHandler function to manage server shutdown based on user preference.
- Updated App component to integrate the new window close handling logic.
- Created a reusable Checkbox component for better UI consistency.
- Modified serverStore to include state management for the new setting.

app/src/components/ui/checkbox.tsx

@@ -0,0 +1,36 @@
+import * as React from 'react';
+import { cn } from '@/lib/utils/cn';
+
+export interface CheckboxProps extends React.InputHTMLAttributes<HTMLInputElement> {
+  onCheckedChange?: (checked: boolean) => void;
+}
+
+const Checkbox = React.forwardRef<HTMLInputElement, CheckboxProps>(
+  ({ className, onCheckedChange, ...props }, ref) => {
+    const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+      if (onCheckedChange) {
+        onCheckedChange(e.target.checked);
+      }
+      // Call original onChange if provided
+      if (props.onChange) {
+        props.onChange(e);
+      }
+    };
+
+    return (
+      <input
+        type="checkbox"
+        className={cn(
+          'h-4 w-4 rounded border-gray-300 text-primary focus:ring-2 focus:ring-primary focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50',
+          className,
+        )}
+        ref={ref}
+        onChange={handleChange}
+        {...props}
+      />
+    );
+  },
+);
+Checkbox.displayName = 'Checkbox';
+
+export { Checkbox };