[imp]: Add waitForInstalled and use after install

This is an attempt to fix the issue of Uninstall/Open not displaying after install. The app requires a hot reload to fix it.

lib/providers/app_provider.dart

@@ -550,7 +550,9 @@ class AppProvider extends ChangeNotifier {
           .toList();
 
       // Clean up preferences for uninstalled apps
-      final installedPackages = _installedApps.map((app) => app.packageName).toSet();
+      final installedPackages = _installedApps
+          .map((app) => app.packageName)
+          .toSet();
       await _preferencesService.cleanupUninstalledApps(installedPackages);
 
       _installedAppsState = LoadingState.success;
@@ -616,7 +618,9 @@ class AppProvider extends ChangeNotifier {
 
   /// Gets the latest version for an app based on per-app unstable preference
   Future<FDroidVersion?> getLatestVersion(FDroidApp app) async {
-    final includeUnstable = await _preferencesService.getIncludeUnstable(app.packageName);
+    final includeUnstable = await _preferencesService.getIncludeUnstable(
+      app.packageName,
+    );
     return app.getLatestVersion(includeUnstable: includeUnstable);
   }
 
@@ -644,6 +648,23 @@ class AppProvider extends ChangeNotifier {
     }
   }
 
+  /// Polls until an app shows up as installed or timeout is reached.
+  Future<bool> waitForInstalled(
+    String packageName, {
+    Duration timeout = const Duration(seconds: 20),
+    Duration interval = const Duration(milliseconds: 800),
+  }) async {
+    final deadline = DateTime.now().add(timeout);
+    while (DateTime.now().isBefore(deadline)) {
+      await fetchInstalledApps();
+      if (isAppInstalled(packageName)) {
+        return true;
+      }
+      await Future.delayed(interval);
+    }
+    return isAppInstalled(packageName);
+  }
+
   /// Refreshes all data
   Future<void> refreshAll({RepositoriesProvider? repositoriesProvider}) async {
     // Clear cached data

lib/screens/app_details_screen.dart

@@ -174,8 +174,7 @@ class _AppDetailsScreenState extends State<AppDetailsScreen> {
           }
 
           await downloadProvider.installApk(downloadInfo!.filePath!);
-          await Future.delayed(const Duration(milliseconds: 100));
-          await appProvider.fetchInstalledApps();
+          await appProvider.waitForInstalled(widget.app.packageName);
           if (context.mounted) {
             ScaffoldMessenger.of(context).showSnackBar(
               SnackBar(
@@ -2469,8 +2468,7 @@ class _VersionDownloadButton extends StatelessWidget {
               try {
                 if (downloadInfo.filePath != null) {
                   await downloadProvider.installApk(downloadInfo.filePath!);
-                  await Future.delayed(const Duration(milliseconds: 100));
-                  await appProvider.fetchInstalledApps();
+                  await appProvider.waitForInstalled(app.packageName);
                   if (context.mounted) {
                     ScaffoldMessenger.of(context).showSnackBar(
                       SnackBar(content: Text('Installing ${app.name}...')),