fix(macos): retain Flutter windowing FFI structs

.github/workflows/pr.yaml

@@ -156,6 +156,8 @@
             with:
               channel: stable
               flutter-version-file: pubspec.yaml
+          - name: Patch Flutter macOS AOT FFI retention
+            run: dart tool/patch_flutter_macos_aot.dart
           - run: flutter pub get
           - name: Inject DanDan API Credentials
             run: |
@@ -204,4 +206,4 @@
             uses: actions/upload-artifact@v4
             with:
               name: ios_outputs
-              path: oneAnime_ios_*.ipa
+              path: oneAnime_ios_*.ipa

.github/workflows/release.yaml

@@ -204,6 +204,8 @@
             with:
               channel: stable
               flutter-version-file: pubspec.yaml
+          - name: Patch Flutter macOS AOT FFI retention
+            run: dart tool/patch_flutter_macos_aot.dart
           - run: flutter pub get
           - name: Inject DanDan API Credentials
             run: |
@@ -351,4 +353,4 @@
                 oneAnime_macos_*.dmg
                 oneAnime_ios_*.ipa
                 oneAnime_linux_*.tar.gz
-                oneAnime_linux_*.AppImage
+                oneAnime_linux_*.AppImage

tool/patch_flutter_macos_aot.dart

@@ -0,0 +1,56 @@
+import 'dart:io';
+
+// Work around https://github.com/flutter/flutter/issues/188060.
+const _ffiStructs = <String>[
+  '_WindowCreationRequest',
+  '_Size',
+  '_Offset',
+  '_Rect',
+  '_Constraints',
+];
+
+void main() {
+  final flutterRoot = Platform.environment['FLUTTER_ROOT'];
+  if (flutterRoot == null || flutterRoot.isEmpty) {
+    stderr.writeln('FLUTTER_ROOT is not set.');
+    exitCode = 1;
+    return;
+  }
+
+  final sourceFile = File(
+    '$flutterRoot/packages/flutter/lib/src/widgets/_window_macos.dart',
+  );
+  if (!sourceFile.existsSync()) {
+    stderr.writeln('Flutter macOS windowing source was not found.');
+    exitCode = 1;
+    return;
+  }
+
+  var source = sourceFile.readAsStringSync();
+  var changed = false;
+
+  for (final struct in _ffiStructs) {
+    final declaration = 'final class $struct extends Struct {';
+    final retainedDeclaration = "@pragma('vm:entry-point')\n$declaration";
+
+    if (source.contains(retainedDeclaration)) {
+      continue;
+    }
+
+    if (declaration.allMatches(source).length != 1) {
+      stderr.writeln('Expected one declaration for $struct.');
+      exitCode = 1;
+      return;
+    }
+
+    source = source.replaceFirst(declaration, retainedDeclaration);
+    changed = true;
+  }
+
+  if (changed) {
+    sourceFile.writeAsStringSync(source);
+    stdout.writeln('Patched Flutter macOS AOT FFI retention.');
+  } else {
+    stdout.writeln('Flutter macOS AOT FFI retention is already patched.');
+  }
+}