test: move stream harness into vitest

packages/app/package.json

@@ -9,7 +9,8 @@
     "ios": "expo run:ios",
     "web": "expo start --web",
     "lint": "expo lint",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run"
   },
   "dependencies": {
     "@boudra/expo-two-way-audio": "^0.1.3",
@@ -65,6 +66,7 @@
     "eas-cli": "^16.24.1",
     "eslint": "^9.25.0",
     "eslint-config-expo": "~10.0.0",
-    "typescript": "~5.9.2"
+    "typescript": "~5.9.2",
+    "vitest": "^3.2.4"
   }
 }

packages/app/vitest.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig } from "vitest/config";
+import path from "path";
+
+export default defineConfig({
+  test: {
+    environment: "node",
+  },
+  resolve: {
+    alias: {
+      "@": path.resolve(__dirname, "src"),
+      "@server": path.resolve(__dirname, "../server/src"),
+    },
+  },
+});