chore: icônes de bundle, packaging Flatpak et bump version 0.1.2

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

flatpak/com.pena.app.yml

@@ -21,6 +21,8 @@ modules:
         path: pena.deb
       - type: file
         path: com.pena.app.metainfo.xml
+      - type: file
+        path: icon.png
     build-commands:
       - |
         set -eux
@@ -40,9 +42,8 @@ modules:
           -e 's/^Icon=.*/Icon=com.pena.app/' \
           /app/share/applications/com.pena.app.desktop
 
-        # Icône : on prend la plus grande disponible
-        icon="$(find usr/share/icons -name '*.png' | sort | tail -n1)"
-        install -Dm644 "$icon" /app/share/icons/hicolor/128x128/apps/com.pena.app.png
+        # Icône (128x128) fournie séparément à côté du manifeste.
+        install -Dm644 icon.png /app/share/icons/hicolor/128x128/apps/com.pena.app.png
 
         # Métadonnées AppStream
         install -Dm644 com.pena.app.metainfo.xml /app/share/metainfo/com.pena.app.metainfo.xml