make it more clear which methods free the buffer

This reverts commit a86748e85f, as it was causing issues on Windows.

lib/controllers/client.dart

@@ -108,7 +108,7 @@ class ClientController extends AsyncNotifier<int> {
         () => callback(handle, bufferPointer.ref),
       );
 
-      final json = response.buf.toJson();
+      final json = response.buf.toJsonAndFree();
 
       if (response.command.cast<Utf8>().toDartString() == "error") {
         throw json;

lib/controllers/gomuks_listener.dart

@@ -35,7 +35,7 @@ class GomuksListenerController extends AsyncNotifier<void> {
           try {
             final muksEventType = command.cast<Utf8>().toDartString();
             debugPrint("Handling $muksEventType...");
-            final decodedMuksEvent = data.toJson();
+            final decodedMuksEvent = data.toJsonAndFree();
 
             switch (muksEventType) {
               case "client_state":

lib/controllers/unified_push.dart

@@ -3,7 +3,6 @@ import "dart:convert";
 import "dart:io";
 
 import "package:flutter/foundation.dart";
-import "package:flutter/services.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:intl/intl.dart";
 import "package:nexus/controllers/key.dart";
@@ -78,7 +77,7 @@ class UnifiedPushController extends AsyncNotifier<bool> {
                       KeyController.provider(KeyController.roomKey).future,
                     ) ==
                     event.roomId)) {
-          if (isInBackground) SystemNavigator.pop();
+          if (isInBackground) exit(0);
           return;
         }
 
@@ -104,7 +103,7 @@ class UnifiedPushController extends AsyncNotifier<bool> {
               },
             );
 
-        if (isInBackground) SystemNavigator.pop();
+        if (isInBackground) exit(0);
       },
       onUnregistered: deregister,
     );

lib/helpers/extensions/gomuks_buffer.dart

@@ -1,20 +1,21 @@
 import "dart:convert";
 import "dart:ffi";
 import "dart:typed_data";
+
 import "package:ffi/ffi.dart";
 import "package:nexus/src/third_party/gomuks.g.dart";
 
 extension GomuksOwnedBufferToX on GomuksOwnedBuffer {
-  Uint8List toBytes() {
+  Uint8List toBytesAndFree() {
     try {
       if (base == nullptr || length <= 0) return .new(0);
       return .fromList(base.asTypedList(length));
     } finally {
-      calloc.free(base);
+      GomuksFreeBuffer(this);
     }
   }
 
-  dynamic toJson() => jsonDecode(utf8.decode(toBytes()));
+  dynamic toJsonAndFree() => jsonDecode(utf8.decode(toBytesAndFree()));
 }
 
 extension JsonToGomuksBuffer on Map<String, dynamic> {

lib/main.dart

@@ -2,7 +2,6 @@ import "dart:io";
 
 import "package:dynamic_color/dynamic_color.dart";
 import "package:flutter/foundation.dart";
-import "package:flutter/services.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:material_emoji_picker/material_emoji_picker.dart";
 import "package:media_kit/media_kit.dart";
@@ -80,7 +79,7 @@ void main(List<String> args) async {
         .timeout(Duration(seconds: 5));
 
     await Future.delayed(Duration(seconds: 10));
-    SystemNavigator.pop();
+    exit(0);
   } else {
     if (Platform.isLinux || Platform.isMacOS || Platform.isWindows) {
       await windowManager.ensureInitialized();

lib/widgets/appbar.dart

@@ -1,7 +1,6 @@
 import "dart:io";
 
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
-import "package:flutter/services.dart";
 import "package:material_ui/material_ui.dart";
 import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:nexus/controllers/settings.dart";
@@ -60,7 +59,7 @@ final class const Appbar({
               ),
             IconButton(
               tooltip: "Close window",
-              onPressed: SystemNavigator.pop,
+              onPressed: () => exit(0),
               icon: const Icon(Icons.close),
             ),
           ],