Enable native dialogs across shells

packages/ui/src/lib/native/electron/functions.ts

@@ -0,0 +1,39 @@
+import type { NativeDialogOptions } from "../native-functions"
+
+interface ElectronDialogResult {
+  canceled?: boolean
+  paths?: string[]
+  path?: string | null
+}
+
+interface ElectronAPI {
+  openDialog?: (options: NativeDialogOptions) => Promise<ElectronDialogResult>
+}
+
+function coerceFirstPath(result?: ElectronDialogResult | null): string | null {
+  if (!result || result.canceled) {
+    return null
+  }
+  const paths = Array.isArray(result.paths) ? result.paths : result.path ? [result.path] : []
+  if (paths.length === 0) {
+    return null
+  }
+  return paths[0] ?? null
+}
+
+export async function openElectronNativeDialog(options: NativeDialogOptions): Promise<string | null> {
+  if (typeof window === "undefined") {
+    return null
+  }
+  const api = (window as Window & { electronAPI?: ElectronAPI }).electronAPI
+  if (!api?.openDialog) {
+    return null
+  }
+  try {
+    const result = await api.openDialog(options)
+    return coerceFirstPath(result)
+  } catch (error) {
+    console.error("[native] electron dialog failed", error)
+    return null
+  }
+}