fix(desktop): prevent crash when using "Screenshot area picker" shortcut #6417

Job	Run time
Typecheck	1m 29s
Format (Biome)	9s
Detect Changes	6s
Lint (Biome)	10s
Format (Cargo)	18s
Clippy (aarch64-apple-darwin, macos-latest)	2m 42s
Clippy (x86_64-pc-windows-msvc, windows-latest)	4m 22s
Build Desktop	-1s
Verify Tauri plugin versions	-1s
Rust cache	-1s
	9m 13s

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