Minor fixes

lib/models/app.dart

@@ -117,7 +117,7 @@ class App extends BaseApp with DataModelMixin<App> {
     final file = File(path.join(dir.path, hash));
 
     installOnDevice() async {
-      notifier.state = DeviceInstallProgress();
+      notifier.state = VerifyingHashProgress();
 
       if (await _isHashMismatch(file.path, hash)) {
         var e = 'Hash mismatch, ';
@@ -344,10 +344,10 @@ Future<bool> _isHashMismatch(String path, String hash) async {
     final digestOutputSink = AccumulatorSink<Digest>();
     final digestInputSink = sha256.startChunkedConversion(digestOutputSink);
     String? digest;
-
     try {
       while (true) {
-        final chunk = await reader.readChunk(1024 * 1024);
+        // Chunk size determined from approximate cpu/memory profiling
+        final chunk = await reader.readChunk(2048);
         if (chunk.isEmpty) {
           break; // EOF
         }
@@ -385,7 +385,7 @@ class DownloadingInstallProgress extends AppInstallProgress {
   DownloadingInstallProgress(this.progress);
 }
 
-class DeviceInstallProgress extends AppInstallProgress {}
+class VerifyingHashProgress extends AppInstallProgress {}
 
 class HashVerifiedInstallProgress extends AppInstallProgress {}
 

lib/screens/app_detail_screen.dart

@@ -475,7 +475,10 @@ class InstallButton extends ConsumerWidget {
         _ => switch (progress) {
             IdleInstallProgress() => () {
                 // show trust dialog only if first install
-                if (app.canInstall && !disabled) {
+                if (disabled) {
+                  context.showError('Missing signer');
+                }
+                if (app.canInstall) {
                   showDialog(
                     context: context,
                     builder: (BuildContext context) {
@@ -500,7 +503,7 @@ class InstallButton extends ConsumerWidget {
       child: LinearPercentIndicator(
         lineHeight: 40,
         percent: switch (progress) {
-          DeviceInstallProgress() => 1,
+          VerifyingHashProgress() => 1,
           DownloadingInstallProgress(:final progress) => progress,
           _ => switch (app.status) {
               AppInstallStatus.updated => 1,
@@ -538,16 +541,15 @@ class InstallButton extends ConsumerWidget {
                   '${(progress * 100).floor()}%',
                   style: TextStyle(fontWeight: FontWeight.bold),
                 ),
-              DeviceInstallProgress() => compact
+              VerifyingHashProgress() => compact
                   ? SizedBox(
                       width: 14, height: 14, child: CircularProgressIndicator())
-                  : Text(
-                      'Requesting ${app.canUpdate ? 'update' : 'installation'} on device'),
+                  : Text('Verifying file integrity'),
               HashVerifiedInstallProgress() => compact
                   ? SizedBox(
                       width: 14, height: 14, child: CircularProgressIndicator())
                   : Text(
-                      'Hash verified, ${app.canUpdate ? 'updating' : 'installing'}'),
+                      'Hash verified, requesting ${app.canUpdate ? 'update' : 'installation'}'),
               ErrorInstallProgress() => compact
                   ? SizedBox(width: 14, height: 14, child: Icon(Icons.error))
                   : Text('Error, tap to see message'),

lib/screens/settings_screen.dart

@@ -23,7 +23,6 @@ class SettingsScreen extends HookConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final systemInfoState = ref.watch(systemInfoProvider);
     final controller = useTextEditingController();
-    // throw 'Invalid testing error';
     final user = ref.settings
         .watchOne('_', alsoWatch: (_) => {_.user})
         .model!
@@ -58,12 +57,14 @@ class SettingsScreen extends HookConsumerWidget {
               loadingWidget: SizedBox(
                   width: 14, height: 14, child: CircularProgressIndicator()),
               onPressed: () async {
-                final text =
-                    '${controller.text.trim()} [from ${user.npub} on ${DateFormat('MMMM d, y').format(DateTime.now())}]';
-                final event = BaseEvent(content: text).sign(kI);
-                await ref.apps.nostrAdapter.notifier
-                    .publish(event, relayUrls: ['wss://relay.zap.store']);
-                controller.clear();
+                if (controller.text.trim().isNotEmpty) {
+                  final text =
+                      '${controller.text.trim()} [from ${user.npub} on ${DateFormat('MMMM d, y').format(DateTime.now())}]';
+                  final event = BaseEvent(content: text).sign(kI);
+                  await ref.apps.nostrAdapter.notifier
+                      .publish(event, relayUrls: ['wss://relay.zap.store']);
+                  controller.clear();
+                }
               },
               builder: (context, child, callback, state) {
                 return switch (state) {