docs(spikes): Deno 2.9.7 + TS 7 compatibility spike and ADR-004

Co-Authored-By: Claude Fable 5.1 <[email protected]>

spikes/deno/web/vitest.config.ts

@@ -0,0 +1,8 @@
+import tsconfigPaths from "vite-tsconfig-paths";
+import { defineConfig } from "vitest/config";
+
+// 单测不加载 react-router / tailwind 插件
+export default defineConfig({
+  plugins: [tsconfigPaths()],
+  test: { include: ["app/**/*.test.ts"], environment: "node" },
+});