feat(core-*): add Vitest configs + composition tests

core-api: appRouter exposes all 4 feature routers + blog procedure shape.
core-cms: payloadConfig registers all collections + globals.
core-trpc: client + provider exports verified.

Spec: §6.1, §6.6

packages/core-trpc/package.json

@@ -11,7 +11,8 @@
   "scripts": {
     "build": "tsc --noEmit",
     "lint": "eslint .",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run --passWithNoTests"
   },
   "dependencies": {
     "@repo/core-api": "workspace:*",
@@ -25,7 +26,12 @@
   },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
+    "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
-    "@types/react": "^19.0.0"
+    "@testing-library/jest-dom": "^6.5.0",
+    "@testing-library/react": "^16.0.0",
+    "@types/react": "^19.0.0",
+    "jsdom": "^25.0.0",
+    "vitest": "^3.0.0"
   }
 }

packages/core-trpc/src/client.test.ts

@@ -0,0 +1,12 @@
+import { describe, it, expect } from "vitest";
+import { useTRPC, TRPCProvider } from "./client";
+
+describe("core-trpc client exports", () => {
+  it("exports useTRPC hook", () => {
+    expect(useTRPC).toBeTypeOf("function");
+  });
+
+  it("exports TRPCProvider component", () => {
+    expect(TRPCProvider).toBeTypeOf("function");
+  });
+});

packages/core-trpc/tsconfig.json

@@ -2,11 +2,15 @@
   "extends": "@repo/core-typescript/base.json",
   "compilerOptions": {
     "outDir": "dist",
-    "rootDir": "src",
+    "rootDir": ".",
     "lib": ["ES2022", "DOM"],
     "jsx": "preserve",
     "declaration": false,
-    "declarationMap": false
+    "declarationMap": false,
+    "types": ["vitest/globals", "@testing-library/jest-dom"],
+    "paths": {
+      "@/*": ["./src/*"]
+    }
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist"]

packages/core-trpc/vitest.config.ts

@@ -0,0 +1,7 @@
+import path from "node:path";
+import { mergeConfig } from "vitest/config";
+import { jsdomVitestConfig } from "@repo/core-typescript/vitest.base.jsdom";
+
+export default mergeConfig(jsdomVitestConfig, {
+  resolve: { alias: { "@": path.resolve(__dirname, "./src") } },
+});