ci: establish trusted quality baseline

vitest.config.ts

@@ -1,5 +1,26 @@
 import { defineConfig } from "vitest/config";
 import path from "node:path";
+import { allowedNodeEnvironmentFlags } from "node:process";
+
+const baseExclude = [
+  "**/node_modules/**",
+  "**/dist/**",
+  "**/.next/**",
+  "e2e/**",
+];
+
+const browserTestFiles = [
+  "src/data/repositories/__tests__/chat_media_cache_coordinator.test.ts",
+  "src/lib/analytics/__tests__/behavior_analytics.test.ts",
+  "src/utils/__tests__/result.test.ts",
+  "src/utils/__tests__/pwa.test.ts",
+];
+
+const workerExecArgv = allowedNodeEnvironmentFlags.has(
+  "--no-experimental-webstorage",
+)
+  ? ["--no-experimental-webstorage"]
+  : [];
 
 export default defineConfig({
   resolve: {
@@ -8,8 +29,27 @@ export default defineConfig({
     },
   },
   test: {
-    environment: "jsdom",
-    exclude: ["**/node_modules/**", "**/dist/**", "**/.next/**", "e2e/**"],
-    globals: true,
+    projects: [
+      {
+        extends: true,
+        test: {
+          name: "node",
+          environment: "node",
+          execArgv: workerExecArgv,
+          include: ["src/**/*.{test,spec}.ts"],
+          exclude: [...baseExclude, ...browserTestFiles],
+        },
+      },
+      {
+        extends: true,
+        test: {
+          name: "jsdom",
+          environment: "jsdom",
+          execArgv: workerExecArgv,
+          include: ["src/**/*.{test,spec}.tsx", ...browserTestFiles],
+          exclude: baseExclude,
+        },
+      },
+    ],
   },
 });