feat: refine download UX and native host flow

tools/native-host/host.mjs

@@ -1,4 +1,3 @@
-import { execFile } from 'node:child_process'
 import { appendFile, mkdir } from 'node:fs/promises'
 import { homedir } from 'node:os'
 import { dirname, join } from 'node:path'
@@ -45,40 +44,7 @@ async function enqueueExternalAdd(payload) {
 }
 
 function focusGdownApp() {
-  return new Promise((resolve) => {
-    if (process.platform !== 'darwin') {
-      resolve({ ok: true, note: 'focus noop on non-macos in step1 host' })
-      return
-    }
-
-    const attempts = [
-      ['osascript', ['-e', 'tell application id "com.tauri.dev" to activate']],
-      ['osascript', ['-e', 'tell application "gdown" to activate']],
-      ['osascript', ['-e', 'tell application "System Events" to set frontmost of first process whose name is "gdown" to true']],
-      ['osascript', ['-e', 'tell application "System Events" to set frontmost of first process whose name is "Gdown" to true']],
-      ['osascript', ['-e', 'tell application "System Events" to set frontmost of first process whose name is "app" to true']],
-      ['open', ['-b', 'com.tauri.dev']],
-      ['open', ['-a', 'gdown']],
-    ]
-
-    const run = (index) => {
-      if (index >= attempts.length) {
-        resolve({ ok: false, message: 'all focus strategies failed' })
-        return
-      }
-
-      const [bin, args] = attempts[index]
-      execFile(bin, args, (error) => {
-        if (!error) {
-          resolve({ ok: true, strategy: `${bin} ${args.join(' ')}` })
-          return
-        }
-        run(index + 1)
-      })
-    }
-
-    run(0)
-  })
+  return Promise.resolve({ ok: true, note: 'focus disabled by design' })
 }
 
 async function handleRequest(message) {
@@ -119,7 +85,6 @@ async function handleRequest(message) {
       proxy: proxy || undefined,
       split: Number.isFinite(split) && split > 0 ? Math.round(split) : undefined,
     })
-    await focusGdownApp()
 
     return {
       ok: true,