Update exception handling in Handler and TestEmailController for improved error reporting

app/Http/Controllers/TestEmailController.php

@@ -36,7 +36,7 @@ class TestEmailController extends Controller
 
             $status  = 'success';
             $message = 'Test email sent successfully to ' . $recipient . '.';
-        } catch (\Exception $e) {
+        } catch (\Throwable $e) {
             $status  = 'danger';
             $message = 'Failed to send email: ' . $e->getMessage();
         }