Return JSON on unhandled contact errors

functions/api/contact.ts

@@ -149,8 +149,20 @@ const handlePost: PagesFunction<Env> = async ({ request, env }) => {
 };
 
 export const onRequest: PagesFunction<Env> = async (context) => {
-    if (context.request.method !== "POST") {
+    try {
-        return jsonResponse({ ok: false, error: "Method not allowed." }, 405);
+        if (context.request.method !== "POST") {
+            return jsonResponse(
+                { ok: false, error: "Method not allowed." },
+                405,
+            );
+        }
+        return handlePost(context);
+    } catch (error) {
+        const message =
+            error instanceof Error ? error.message : "Unknown error";
+        return jsonResponse(
+            { ok: false, error: "Unhandled exception.", details: message },
+            500,
+        );
     }
-    return handlePost(context);
 };