integration tests

webclient/vitest.integration.config.ts

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+import react from '@vitejs/plugin-react';
+import { defineConfig } from 'vitest/config';
+
+// Integration tests exercise the full inbound/outbound webclient pipeline
+// (ProtobufService → event handlers → persistence → Redux) with only the
+// browser WebSocket constructor mocked. They live in `integration/` and run
+// under their own config so they can use `isolate: true` without slowing down
+// the unit suite (which relies on `isolate: false` for shared vi.mock state).
+export default defineConfig({
+  plugins: [react()],
+  resolve: {
+    tsconfigPaths: true,
+  },
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: ['./integration/src/helpers/setup.ts'],
+    include: ['integration/src/**/*.spec.ts'],
+    isolate: false,
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'html'],
+      reportsDirectory: './coverage/integration',
+      include: ['src/**/*.{ts,tsx}'],
+      exclude: [
+        'src/generated/**',
+        'src/**/*.spec.{ts,tsx}',
+        'src/**/__mocks__/**',
+        'src/setupTests.ts',
+        'src/polyfills.ts',
+      ],
+    },
+  },
+});