- csproj: add <Version>0.9.0</Version> as single source of truth
- AppVersion reads Major.Minor.Build from the assembly; WindowTitle
exposes "Palladium Wallet 0.9.0" bound to Window.Title
- Menu Help → in-app overlay (same pattern as settings/server overlays)
showing app name, version and a short description; backdrop tap and
Esc close it
- i18n: menu.help, help.title, help.info in all 6 languages
Add logo.png (source) and logo.ico (multi-size: 256/128/64/48/32/16)
generated with Pillow. Remove avalonia-logo.ico (Avalonia template
placeholder). Update MainWindow.axaml Icon and csproj ApplicationIcon
to point to the new files.
Adds QRCoder 1.8.0 and generates a PNG QR code in-memory each time
the receive address changes (OnReceiveAddressChanged). The bitmap is
displayed in the Receive tab inside a white-background border with
pixel-perfect scaling (BitmapInterpolationMode=None). Previous bitmap
is disposed to avoid memory leaks.
davide