fix some of the dart analyzer complaints

try to generate locals manually

.github/workflows/build.yml

@@ -40,13 +40,13 @@ jobs:
       - run: set -e
       - run: ./submodules/flutter/bin/flutter doctor
       - run: ./submodules/flutter/bin/flutter config --no-analytics
-      - run: ./submodules/flutter/bin/dart run build_runner build --delete-conflicting-outputs
       - run: ./submodules/flutter/bin/flutter pub get
       - run: ./submodules/flutter/bin/dart format --output=none --set-exit-if-changed ./lib
       - run: ./submodules/flutter/bin/dart analyze ./lib
      # - name: Run tests with nix (starts postgres and invidious server)
      #   run: nix-shell --run './submodules/flutter/bin/flutter test'
       - run: ./submodules/flutter/bin/flutter pub run flutter_native_splash:create
+      - run: ./submodules/flutter/bin/flutter gen-l10n
       - run: ./submodules/flutter/bin/flutter build apk --profile --split-per-abi
       - name: Archive build artifacts
         uses: actions/upload-artifact@v3

.github/workflows/release.yml

@@ -55,9 +55,9 @@ jobs:
           export PUB_CACHE=$(pwd)/.pub-cache
           ./submodules/flutter/bin/flutter doctor
           ./submodules/flutter/bin/flutter config --no-analytics
-          ./submodules/flutter/bin/dart run build_runner build --delete-conflicting-outputs
           ./submodules/flutter/bin/flutter pub get
           ./submodules/flutter/bin/flutter pub run flutter_native_splash:create
+          ./submodules/flutter/bin/flutter gen-l10n
           ./submodules/flutter/bin/flutter build apk --split-per-abi
           ./submodules/flutter/bin/flutter build apk
           ./submodules/flutter/bin/flutter build appbundle

l10n.yaml

@@ -1,4 +1,8 @@
 arb-dir: lib/l10n
 template-arb-file: app_en.arb
 output-localization-file: app_localizations.dart
-use-escaping: true
+use-escaping: true
+# workaround for issue: https://github.com/flutter/flutter/issues/148333
+synthetic-package: false
+output-dir: lib/l10n/gen_l10n
+nullable-getter: false