feat(app): open in <app> button (#12322)

packages/desktop/src/index.tsx

@@ -4,6 +4,7 @@ import { render } from "solid-js/web"
 import { AppBaseProviders, AppInterface, PlatformProvider, Platform } from "@opencode-ai/app"
 import { open, save } from "@tauri-apps/plugin-dialog"
 import { getCurrent, onOpenUrl } from "@tauri-apps/plugin-deep-link"
+import { openPath as openerOpenPath } from "@tauri-apps/plugin-opener"
 import { open as shellOpen } from "@tauri-apps/plugin-shell"
 import { type as ostype } from "@tauri-apps/plugin-os"
 import { check, Update } from "@tauri-apps/plugin-updater"
@@ -87,6 +88,10 @@ const createPlatform = (password: Accessor<string | null>): Platform => ({
     void shellOpen(url).catch(() => undefined)
   },
 
+  openPath(path: string, app?: string) {
+    return openerOpenPath(path, app)
+  },
+
   back() {
     window.history.back()
   },