fix: ignore toast promise message if promiseData is undefined or some…

[dev-mmh]

…thing

fix issues
#669

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Name	Status	Preview	Comments	Updated (UTC)
sonner	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 21, 2025 5:51pm

[dev-mmh]

I want to dismiss toast promise based on condition like this

toast.promise(promise(), {
   loading: "Loading...",
   success: ({ data }) => {
      if (data.message === "something") {
         // skip the toast
         return undefined;
      }
      return "Success!";
   },
   error: (error) => {
      if(error.status === 404) {
         // skip the toast 
         return undefined
      }
      return "Error"
   }
});