Fix locking out editor buttons while submitting

lib/screens/editor.dart

@@ -26,6 +26,8 @@ class _EditorScreenState extends State<EditorScreen> {
   final spoilerController = TextEditingController();
   TimelineEntry? parentEntry;
 
+  var isSubmitting = false;
+
   bool get isComment => widget.parentId.isNotEmpty;
 
   String get statusType => widget.parentId.isEmpty ? 'Post' : 'Comment';
@@ -51,11 +53,17 @@ class _EditorScreenState extends State<EditorScreen> {
       buildSnackbar(context, "Can't submit an empty post/comment");
       return;
     }
+    setState(() {
+      isSubmitting = false;
+    });
     final result = await manager.createNewStatus(
       contentController.text,
       spoilerText: spoilerController.text,
       inReplyToId: widget.parentId,
     );
+    setState(() {
+      isSubmitting = false;
+    });
 
     if (result.isFailure) {
       buildSnackbar(context, 'Error posting: ${result.error}');
@@ -85,6 +93,8 @@ class _EditorScreenState extends State<EditorScreen> {
                 if (isComment && parentEntry != null)
                   buildCommentPreview(context, parentEntry!),
                 TextFormField(
+                  readOnly: isSubmitting,
+                  enabled: !isSubmitting,
                   controller: spoilerController,
                   decoration: InputDecoration(
                     labelText: '$statusType Spoiler Text (optional)',
@@ -98,6 +108,8 @@ class _EditorScreenState extends State<EditorScreen> {
                 ),
                 const VerticalPadding(),
                 TextFormField(
+                  readOnly: isSubmitting,
+                  enabled: !isSubmitting,
                   maxLines: 10,
                   controller: contentController,
                   decoration: InputDecoration(
@@ -116,14 +128,18 @@ class _EditorScreenState extends State<EditorScreen> {
                   mainAxisAlignment: MainAxisAlignment.center,
                   children: [
                     ElevatedButton(
-                      onPressed: () async => createStatus(context, manager),
+                      onPressed: isSubmitting
+                          ? null
+                          : () async => createStatus(context, manager),
                       child: const Text('Submit'),
                     ),
                     const HorizontalPadding(),
                     ElevatedButton(
-                      onPressed: () {
-                        context.pop();
-                      },
+                      onPressed: isSubmitting
+                          ? null
+                          : () {
+                              context.pop();
+                            },
                       child: const Text('Cancel'),
                     ),
                   ],