fix(autoUpdate): better error handling in frontEnd

#50

app/sendReport.js

@@ -35,10 +35,17 @@ async function sendReport(params) {
             }
         }
 
-        const response = await fetch(process.env.BUG_REPORT_URL, {
+        const reportUrl = process.env.BUG_REPORT_URL;
+        const reportApiKey = process.env.BUG_REPORT_API_KEY;
+
+        if (!reportUrl || !reportApiKey) {
+            throw new Error("Bug report service is not configured. Missing BUG_REPORT_URL or BUG_REPORT_API_KEY on backend.");
+        }
+
+        const response = await fetch(reportUrl, {
             method: "POST",
             headers: {
-                "X-Api-Key": process.env.BUG_REPORT_API_KEY
+                "X-Api-Key": reportApiKey
             },
             body: formData
         });

public/script/autoUpdate.js

@@ -45,13 +45,32 @@ async function initUpdateUI() {
       return;
     }
 
-    btn.onclick = () => {
-      window.electronAPI.downloadUpdate();
+    const initialButtonText = btn.textContent;
+    const initialIconText = icon.textContent;
+    const initialTitleText = title.textContent;
+    const initialSubText = sub.textContent;
+
+    btn.onclick = async () => {
+
       btn.disabled = true;
       btn.textContent = "Downloading...";
       icon.textContent = "download";
       title.textContent = "Downloading update";
       progressWrap.style.display = "flex";
+
+      try {
+        await window.electronAPI.downloadUpdate();
+      } catch {
+        btn.disabled = false;
+        btn.textContent = initialButtonText;
+        icon.textContent = initialIconText;
+        title.textContent = initialTitleText;
+        sub.textContent = initialSubText;
+        progressWrap.style.display = "none";
+        progressFill.style.width = "0%";
+        progressPct.textContent = "0%";
+        progressEta.textContent = "";
+      }
     };
 
     window.electronAPI.onDownloadProgress((progress) => {