fix: title bar buttons work with a finger on Wayland (Issue #36)

winit 0.29 draws the title bar itself on Wayland but only handles the
mouse there. A vendored copy of winit 0.29.15 (vendor/winit, used via
[patch.crates-io]) passes touches on the decorations to the frame like a
left click, so close, minimize and maximize work with a finger and
dragging the title bar moves the window.

CI no longer sets a global -D warnings, which would also apply to the
vendored crate; clippy still runs with -D warnings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitea/workflows/release.yaml

@@ -48,6 +48,9 @@ jobs:
           # schlagen cargo fmt und cargo clippy in den Quality Gates sofort fehl
           components: rustfmt, clippy
           cache: true
+          # No global -D warnings: it would also apply to the vendored winit (vendor/winit),
+          # which is built as a path dependency. The quality gates run clippy with -D warnings.
+          rustflags: ""
 
       - name: Install rsign2 (Release-Signatur)
         # RUSTFLAGS leeren: die Toolchain-Action setzt -D warnings, das soll nicht für rsign2 gelten