💄 Optimize thought input space to avoid input cover message

lib/screens/thought/think.dart

@@ -102,7 +102,7 @@ class ThoughtScreen extends HookConsumerWidget {
               } catch (e) {
                 showSnackBar('Failed to retry billing');
               }
-              hideLoadingModal(context);
+              if (context.mounted) hideLoadingModal(context);
             },
             [context, ref],
           );

lib/screens/thought/think_sheet.dart

@@ -62,7 +62,7 @@ class ThoughtSheet extends HookConsumerWidget {
               } catch (e) {
                 showSnackBar('Failed to retry billing');
               }
-              hideLoadingModal(context);
+              if (context.mounted) hideLoadingModal(context);
             },
             [context, ref],
           );