fix(updater): keep update dialog compact and adapt branding contract

nebula_app/i18n/en-US.json

@@ -800,8 +800,9 @@
     },
     "auto_download": "Download updates in the background",
     "stop_download": "Stop download",
+    "skip_version": "Skip version",
     "restart_install": "Restart and install",
-    "install_next_launch": "Install on next launch",
+    "install_next_launch": "Install on launch",
     "ready_hint": "The update is ready. Pebrel will save your workspace and exit before installation, then reopen it.",
     "later": "Later",
     "prepare_failed": "Could not prepare the update: {error}. Pebrel will stay open.",

nebula_app/i18n/ko-KR.json

@@ -175,6 +175,7 @@
     "sent_to": "{target}(으)로 전송했습니다"
   },
   "update": {
+    "skip_version": "이 버전 건너뛰기",
     "downloading_hint": "이 기기에 맞는 업데이트 패키지를 다운로드하고 검증하는 중입니다.",
     "no_verified_package": "이 릴리스에는 이 기기에 맞는 검증된 업데이트 패키지가 없습니다. 릴리스 페이지에서 직접 다운로드하세요.",
     "check_fallback_failed": "GitHub API 접근이 제한되었으며(HTTP {status}) 공식 릴리스 페이지에도 연결할 수 없습니다: {error}. 나중에 다시 시도하거나 릴리스 페이지를 여세요.",

nebula_app/i18n/zh-CN.json

@@ -800,9 +800,10 @@
     },
     "auto_download": "在后台预下载更新",
     "stop_download": "停止下载",
+    "skip_version": "跳过此版本",
     "restart_install": "重启并安装",
     "install_next_launch": "下次启动时安装",
-    "ready_hint": "更新已就绪。Pebrel 将先保存工作区并退出，再安装更新并重新打开。",
+    "ready_hint": "更新已就绪，将保存工作区、安装更新并重启。",
     "later": "稍后",
     "prepare_failed": "更新准备失败：{error}。Pebrel 将保持打开。",
     "draft_changed": "准备退出期间文档发生了变化。请保存或放弃最新修改后重试。",

nebula_app/src/gpui_shell/workspace/update_dialog.rs

@@ -203,7 +203,7 @@ pub(crate) fn open_update_dialog(
         let latest_version: SharedString = format!("v{}", dialog_result.latest).into();
         let later_text: SharedString =
             language.text(Message::UpdateLater).into();
-        let skip_text: SharedString = language.pick("跳过此版本", "Skip this version").into();
+        let skip_text: SharedString = language.text(Message::UpdateSkipVersion).into();
         let muted = cx.theme().muted_foreground;
         let latest_color = cx.theme().warning;
         let version_background = cx.theme().muted;
@@ -360,6 +360,7 @@ pub(crate) fn open_update_dialog(
         let cancel_save_failed_prefix = save_failed_prefix.to_owned();
         let cancel_error_separator = error_separator.to_owned();
         let mut footer = DialogFooter::new()
+            .gap(px(6.0))
             .child(
                 Button::new("skip-nebula-update")
                     .label(skip_text)

scripts/tests/test_pebrel_branding.py

@@ -85,7 +85,15 @@ class PebrelBrandingTests(unittest.TestCase):
         self.assertIn('format!("Pebrel-v{version}-windows-x64-setup.exe")', check)
         self.assertIn('format!("NebulaTerminal-{version}-windows-x64-setup.exe")', check)
         self.assertIn("windows_x64_installer_names(version)", check)
-        self.assertIn("windows_x64_installer_names(&asset.version).contains(&asset.name)", download)
+        # Discovery and validation now route through the shared native selector.
+        # Retain the Windows brand contract while also checking the macOS path;
+        # executable Rust regressions cover accepted brands and rejected URLs.
+        assets = self.source("nebula_app/src/update_check/assets.rs")
+        self.assertIn("assets::native_names(&version)", check)
+        self.assertIn("assets::native_names(&asset.version)", download)
+        self.assertIn("super::windows_x64_installer_names(version).to_vec()", assets)
+        self.assertIn("Platform::MacOS => macos_names(version, std::env::consts::ARCH)", assets)
+        self.assertIn("if !names.contains(&asset.name)", download)
 
     def test_notification_identity_uses_pebrel(self):
         source = self.source("nebula_app/src/platform/notifications.rs")