website update version display and ota handler

rust/src_webpack/src/main.ts

@@ -201,15 +201,22 @@ export class Controller {
         }, false);
         ajax.addEventListener("load", () => {
             controller.progressview.removeProgress("ota_upload")
-            controller.reboot();
+            const status = ajax.status;
+            if (status >= 200 && status < 300) {
+                controller.reboot();
+            } else {
+                const statusText = ajax.statusText || "";
+                const body = ajax.responseText || "";
+                toast.error(`OTA update error (${status}${statusText ? ' ' + statusText : ''}): ${body}`);
+            }
         }, false);
         ajax.addEventListener("error", () => {
-            alert("Error ota")
             controller.progressview.removeProgress("ota_upload")
+            toast.error("OTA upload failed due to a network error.");
         }, false);
         ajax.addEventListener("abort", () => {
-            alert("abort ota")
             controller.progressview.removeProgress("ota_upload")
+            toast.error("OTA upload was aborted.");
         }, false);
         ajax.open("POST", PUBLIC_URL + "/ota");
         ajax.send(file);
@@ -570,4 +577,4 @@ window.addEventListener("beforeunload", (event) => {
         event.returnValue = confirmationMessage; // This will trigger the browser's default dialog
         return confirmationMessage;
     }
-});
+});