feat: keep the model registry dialog open on overlay click and Escape

Editing a large registry draft is easy to lose to a stray click; the
dialog now only closes via the X or Close button.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/app/components/ConfigDialog.tsx

@@ -27,7 +27,12 @@ export function ConfigDialog({ open, onOpenChange }: ConfigDialogProps) {
       open={open}
       onOpenChange={onOpenChange}
     >
-      <DialogContent className="sm:max-w-6xl">
+      <DialogContent
+        className="sm:max-w-6xl"
+        onPointerDownOutside={(event) => event.preventDefault()}
+        onInteractOutside={(event) => event.preventDefault()}
+        onEscapeKeyDown={(event) => event.preventDefault()}
+      >
         <DialogHeader>
           <DialogTitle>Model registry</DialogTitle>
           <DialogDescription>