improvemets & fixes:

- added 'open with' handling to desktop shortcuts
- move logs button to app configuration
- fix sync progress disappearing after long hashing
- fix sync double file counter
- merge wine and proton prefix folders via symlink

src/shortcuts.js

@@ -44,8 +44,14 @@ function execToken(token) {
   return /[ $"'\\]/.test(token) ? `"${escaped}"` : escaped
 }
 
+// The `%f` file field is appended AFTER escaping (a literal % would have been
+// doubled into a literal). It makes the shortcut a file handler: the file
+// manager substitutes the opened file there - and removes the field when the
+// shortcut is launched from the menu - so "Open with" on the shortcut runs the
+// app with that file, like it does on Windows.
 function execLine(extraArgs) {
-  return [...launcherArgv(), ...extraArgs.split(' ').filter(Boolean).map(execToken)].map(execToken).join(' ')
+  const tokens = [...launcherArgv(), ...String(extraArgs).split(' ').filter(Boolean)]
+  return [...tokens.map(execToken), '%f'].join(' ')
 }
 
 function sanitizeName(name) {
@@ -71,7 +77,7 @@ function buildDesktopEntry(game) {
     'Type=Application',
     `Name=${name}`,
     'Comment=Launch via PLWL',
-    `Exec=${execLine(`--launch ${game.id}`)}`,
+    `Exec=${execLine(`--launch ${game.id} --file`)}`,
     'Terminal=false',
     'Categories=Game;'
   ]