fix: Add cross-platform handling for tray, updater, and icon generation

- Add platform notes for tray startup, shortcut saving, and Linux-only settings
- Handle stat error in processRecording (missing file)
- Select correct binary name based on OS in updater
- Increase tray icon canvas size from 64 to 128 pixels
- Update frontend dist asset hash

main.go

@@ -87,6 +87,8 @@ func main() {
 		OnBeforeClose:    app.beforeClose,
 		StartHidden:      true,
 		Bind:             []interface{}{app},
+		// PLATFORM NOTE: Linux-specific Wails options (sets the program name
+		// for desktop integration). These options are only applied on Linux.
 		Linux: &linux.Options{
 			ProgramName: "wis-free-v3",
 		},