Add app source and tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

test/web_build_test.dart

@@ -0,0 +1,74 @@
+import 'dart:io';
+
+import 'package:archive/archive.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:peach/Peach/about/internal/application/ServiceConfig.dart';
+import 'package:peach/Peach/about/internal/file/BuildService.dart';
+import 'package:peach/Peach/about/internal/file/WebArchive.dart';
+
+void main() {
+  test('buildWeb locates the React build/ output', () async {
+    final dir = Directory.systemTemp.createTempSync('peachdeploy_web_test');
+    addTearDown(() => dir.deleteSync(recursive: true));
+
+    Directory('${dir.path}/build').createSync(recursive: true);
+    File('${dir.path}/build/index.html').writeAsStringSync('<html></html>');
+    File('${dir.path}/build/main.js').writeAsStringSync('console.log(1)');
+
+    final svc = ServiceConfig(
+      name: 'site',
+      kind: ServiceKind.webApp,
+      framework: WebFramework.react,
+      localProjectPath: dir.path,
+      buildCommand: Platform.isWindows ? 'echo building' : 'true',
+    );
+
+    final build = BuildService();
+    addTearDown(build.dispose);
+
+    final result = await build.buildWeb(svc);
+    expect(result.ok, isTrue, reason: result.message);
+    expect(result.dir, isNotNull);
+    expect(result.dir!.path.replaceAll('\\', '/'), endsWith('build'));
+  });
+
+  test('static framework needs no build and publishes the folder', () async {
+    final dir = Directory.systemTemp.createTempSync('peachdeploy_static_test');
+    addTearDown(() => dir.deleteSync(recursive: true));
+    File('${dir.path}/index.html').writeAsStringSync('<html></html>');
+
+    final svc = ServiceConfig(
+      name: 'static',
+      kind: ServiceKind.webApp,
+      framework: WebFramework.staticFiles,
+      localProjectPath: dir.path,
+    );
+    final build = BuildService();
+    addTearDown(build.dispose);
+
+    final result = await build.buildWeb(svc);
+    expect(result.ok, isTrue, reason: result.message);
+    expect(result.dir, isNotNull);
+  });
+
+  test('WebArchive tar.gz round-trips files at the archive root', () {
+    final dir = Directory.systemTemp.createTempSync('peachdeploy_arch_test');
+    addTearDown(() => dir.deleteSync(recursive: true));
+    File('${dir.path}/index.html').writeAsStringSync('hello');
+    Directory('${dir.path}/assets').createSync();
+    File('${dir.path}/assets/app.js').writeAsStringSync('x = 1;');
+
+    final (bytes, count) = WebArchive.tarGz(dir);
+    expect(count, 2);
+
+    final tar = GZipDecoder().decodeBytes(bytes);
+    final archive = TarDecoder().decodeBytes(tar);
+    final names = archive.files.map((f) => f.name).toSet();
+    // Paths must be POSIX (forward slashes) so `tar` on Linux rebuilds the
+    // directory tree instead of creating literal `assets\app.js` files.
+    expect(names.any((n) => n.contains('\\')), isFalse,
+        reason: 'archive entries must use forward slashes');
+    expect(names, contains('index.html'));
+    expect(names, contains('assets/app.js'));
+  });
+}