fix(upgrade): use authenticated status polling after restart

Remove the version header from the health endpoint and use upgrade status polling to determine completion.

tests/Unit/CoolifyUpgradeStatusTest.php

@@ -119,23 +119,24 @@ it('ignores stale status files older than ten minutes', function () {
     expect($result['status'])->toBe('none');
 });
 
-it('waits for the running version to match the target before showing reload', function () {
+it('checks the running version through authenticated upgrade status before showing reload', function () {
     $upgradeView = file_get_contents(__DIR__.'/../../resources/views/livewire/upgrade.blade.php');
 
     expect($upgradeView)
-        ->toContain('X-Coolify-Version')
-        ->toContain('hasReachedTargetVersion')
+        ->not->toContain('X-Coolify-Version')
+        ->toContain('this.$wire.getUpgradeStatus()')
+        ->toContain("data.status === 'complete'")
         ->toContain('livewireFailures');
 });
 
-it('treats a healthy instance without a version header as ready only after downtime', function () {
+it('uses the public health endpoint only for liveness during an upgrade', function () {
     $upgradeView = file_get_contents(__DIR__.'/../../resources/views/livewire/upgrade.blade.php');
 
     expect($upgradeView)
         ->toContain('instanceWentDown')
-        ->toContain('isReadyToReload')
         ->toContain('startHealthWatch')
-        ->toContain('data.status === \'none\'');
+        ->toContain("fetch('/api/health')")
+        ->not->toContain('response.headers.get');
 });
 
 it('starts the upgrade after the Livewire response so status polling is not blocked', function () {