fix: add error handling for launchUrl in About Us feedback link

The feedback/bug-report link in about_us_screen.dart called launchUrl()
directly with no canLaunchUrl check and no try/catch. If the URL fails
to launch for any reason, the app throws an unhandled exception and
crashes.

Added canLaunchUrl check before calling launchUrl, consistent with the
existing pattern used by other links in the same file.

Fixes #3374

Author: prajakta128

lib/view/about_us_screen.dart

@@ -135,7 +135,14 @@ class _AboutUsScreenState extends State<AboutUsScreen> {
                   style: const TextStyle(fontSize: 15),
                 ),
                 onTap: () async {
-                  await launchUrl(Uri.parse(appLocalizations.feedbackForm));
+                  final uri = Uri.parse(appLocalizations.feedbackForm);
+                  if (await canLaunchUrl(uri)) {
+                    await launchUrl(uri);
+                  } else {
+                    debugPrint(
+                      'Could not launch ${appLocalizations.feedbackForm}',
+                    );
+                  }
                 },
               ),
               const Divider(thickness: 0.5),
@@ -162,7 +169,8 @@ class _AboutUsScreenState extends State<AboutUsScreen> {
                       );
                     } else if (snapshot.hasError) {
                       logger.e(
-                          "Error getting version information: ${snapshot.error.toString()}");
+                        "Error getting version information: ${snapshot.error.toString()}",
+                      );
                       return Text(
                         appLocalizations.error,
                         style: const TextStyle(fontSize: 15),