add support for directly launching windows exes from file exporer using .desktop shortcut

src/preload.js

@@ -10,6 +10,15 @@ ipcRenderer.on('import:progress', (e, data) => {
   if (importProgressCb) importProgressCb(data)
 })
 
+// "Open with PLWL": single-slot callback for files handed over via --open
+// (Exec %f) - the renderer shows the wine/prefix picker popup for it.
+let openWithCb = null
+ipcRenderer.on('openwith:file', (e, openPath) => {
+  if (openWithCb) openWithCb(openPath)
+})
+const fs = require('fs')
+const path = require('path')
+
 contextBridge.exposeInMainWorld('plwl', {
   FILES_DIR: DIRS.FILES,
   i18nList: () => ipcRenderer.invoke('i18n:list'),
@@ -26,6 +35,20 @@ contextBridge.exposeInMainWorld('plwl', {
   prefixesCreate: name => ipcRenderer.invoke('prefixes:create', name),
   prefixesDelete: name => ipcRenderer.invoke('prefixes:delete', name),
   prefixesSetDefault: name => ipcRenderer.invoke('prefixes:setDefault', name),
+  openwithTake: () => ipcRenderer.invoke('openwith:take'),
+  openwithRun: payload => ipcRenderer.invoke('openwith:run', payload),
+  openwithTexts: lang => ipcRenderer.invoke('openwith:texts', lang),
+  onOpenWith: cb => {
+    openWithCb = cb
+  },
+  basename: p => (p ? path.basename(p) : ''),
+  fileExists: p => {
+    try {
+      return !!p && fs.existsSync(p)
+    } catch {
+      return false
+    }
+  },
   gamesList: () => ipcRenderer.invoke('games:list'),
   gamesGet: id => ipcRenderer.invoke('games:get', id),
   gamesUpdate: (id, patch) => ipcRenderer.invoke('games:update', id, patch),