Split the largest app files and run tests on pull requests

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: Test
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: macos-15
+    steps:
+      - uses: actions/checkout@v5
+      - name: Run unit tests
+        run: swift test

README.md

@@ -131,7 +131,7 @@ swift test
 
 If tests fail because `XCTest` is unavailable, install the full Xcode app instead of using only Command Line Tools.
 
-Check all UI languages with `scripts/check-localization.sh`. Add `--snapshots` to generate a local HTML gallery of synthetic native UI fixtures under `.build/localization-audit/`; the command prints its path. Pull requests run the localization checks automatically. See [localization coverage and remaining manual checks](docs/localization-audit.md).
+Check all UI languages with `scripts/check-localization.sh`. Add `--snapshots` to generate a local HTML gallery of synthetic native UI fixtures under `.build/localization-audit/`; the command prints its path. Pull requests and pushes to `main` run the full unit test suite and the localization checks automatically. See [localization coverage and remaining manual checks](docs/localization-audit.md).
 
 ## Keyboard Flow
 

README.zh-CN.md

@@ -131,7 +131,7 @@ swift test
 
 如果测试因为 `XCTest` 不可用而失败，请安装完整 Xcode，而不是只安装 Command Line Tools。
 
-使用 `scripts/check-localization.sh` 检查所有界面语言。加上 `--snapshots` 可在 `.build/localization-audit/` 下生成使用模拟数据的原生界面 HTML 截图集，命令会输出文件路径。Pull request 会自动运行本地化检查。检查范围和仍需手动验证的项目见[本地化检查说明](docs/localization-audit.md)。
+使用 `scripts/check-localization.sh` 检查所有界面语言。加上 `--snapshots` 可在 `.build/localization-audit/` 下生成使用模拟数据的原生界面 HTML 截图集，命令会输出文件路径。Pull request 和推送到 `main` 的提交会自动运行全部单元测试和本地化检查。检查范围和仍需手动验证的项目见[本地化检查说明](docs/localization-audit.md)。
 
 ## 快捷键