add try catch alert to imageGen

src/addImage.tsx

@@ -195,6 +195,7 @@ export function AddImage({
                 className="bg-sky-400 m-1 p-1 rounded disabled:bg-slate-500"
                 disabled={imageGenGenerating}
                 onClick={async () => {
+                  try {
                     setImageGenGenerating(true);
                     const body: any = {
                       prompt: imageGenPrompt,
@@ -217,6 +218,7 @@ export function AddImage({
                         body: JSON.stringify(body),
                       }).then((resp) => resp.json())
                     ).data;
+                    console.log("image gen resp", resp);
 
                     for (const image of resp) {
                       let url = "";
@@ -247,9 +249,12 @@ export function AddImage({
 
                       setChatStore({ ...chatStore });
                     }
-
+                  } catch (e) {
+                    console.error(e);
+                    alert("Failed to generate image: " + e);
+                  } finally {
                     setImageGenGenerating(false);
-                  console.log("image resp", resp);
+                  }
                 }}
               >
                 {Tr("Generate")}