Fix Windows badge API for windows-rs 0.61 + add libfuse2 for Linux AppImage

- Move BOOL import to windows::core (removed from Win32::Foundation in 0.61)
- Move CreateBitmap import from WindowsAndMessaging to Win32::Graphics::Gdi
- Wrap nullable handles in Some() for GetDC, CreateCompatibleDC,
  CreateDIBSection, ReleaseDC (new Option<T> API in 0.61)
- Add .into() for all SelectObject/DeleteObject GDI handle args (now HGDIOBJ)
- Use FONT_PITCH_AND_FAMILY type directly in CreateFontW instead of u32 cast
- Make DrawTextW slice mutable (&mut [u16] required in 0.61)
- Use hicon.unwrap_or_default() for SetOverlayIcon (takes HICON not Option<HICON>)
- Add libfuse2 to apt-get for Linux AppImage bundler (FUSE mount fallback)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -134,7 +134,8 @@ jobs:
             libayatana-appindicator3-dev \
             librsvg2-dev \
             patchelf \
-            xdg-utils
+            xdg-utils \
+            libfuse2
 
       - uses: dtolnay/rust-toolchain@stable