icône: manette de jeu (flutter_launcher_icons) au lieu du logo Flutter

Ajoute flutter_launcher_icons (manette blanche sur fond indigo, adaptatif +
legacy) et l'étape CI de génération après flutter create/pub get.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -28,6 +28,7 @@ jobs:
           flutter create --platforms=android --org nfteam --project-name gamemanager .
           python3 tool/patch_android.py
           flutter pub get
+          dart run flutter_launcher_icons
           flutter build apk --release --build-name="${NAME}" --build-number="${RUN}"
           cp build/app/outputs/flutter-apk/app-release.apk gamemanager.apk
           printf '{"version":"1.0.%s","version_code":%s,"notes":"Build CI #%s"}' "${RUN}" "${RUN}" "${RUN}" > version.json

pubspec.yaml

@@ -23,6 +23,17 @@ dependencies:
 
 dev_dependencies:
   flutter_lints: ^5.0.0
+  flutter_launcher_icons: ^0.14.1
+
+# Icône de lanceur (générée en CI par flutter_launcher_icons après `flutter create`).
+# Manette blanche sur fond indigo ; adaptatif Android 8+ + PNG legacy.
+flutter_launcher_icons:
+  android: true
+  ios: false
+  image_path: "assets/brand/gm-legacy.png"
+  adaptive_icon_background: "#4F46E5"
+  adaptive_icon_foreground: "assets/brand/gm-foreground.png"
+  min_sdk_android: 21
 
 flutter:
   uses-material-design: true