chore: add typecheck script and fix pre-existing TypeScript errors

- Add `typecheck` script (`tsc --noEmit`) to package.json
- Remove conflicting `declare global` from test/setup.ts (superseded
  by @cloudflare/workers-types); use `globalThis as any` for test globals
  and declare minimal `require` locally to avoid pulling in @types/node
- Cast `createMockEnv()` and `deleteRes.json()` results in admin.test.ts
  to silence strict `unknown` / MockKV-vs-KVNamespace errors

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package.json

@@ -10,7 +10,8 @@
     "deploy": "wrangler deploy --env production",
     "test": "vitest run",
     "test:watch": "vitest",
-    "test:coverage": "vitest run --coverage"
+    "test:coverage": "vitest run --coverage",
+    "typecheck": "tsc --noEmit"
   },
   "author": "",
   "license": "MIT",

src/routes/admin.test.ts

@@ -11,10 +11,10 @@ describe("Admin Routes", () => {
   let loginAndGetCookie: () => Promise<string>;
 
   beforeEach(() => {
-    mockEnv = createMockEnv();
+    mockEnv = createMockEnv() as unknown as Env;
     testApp = new Hono();
     testApp.route("/admin", app);
-    request = (path, init = {}) => testApp.request(path, init, mockEnv);
+    request = (path, init = {}) => Promise.resolve(testApp.request(path, init, mockEnv));
     loginAndGetCookie = async () => {
       const formData = new FormData();
       formData.append("password", "test-password");
@@ -161,8 +161,8 @@ describe("Admin Routes", () => {
           "json",
         );
         expect(feedConfig).toBeTruthy();
-        expect(feedConfig.title).toBe("Test Feed");
-        expect(feedConfig.description).toBe("Test Description");
+        expect((feedConfig as any).title).toBe("Test Feed");
+        expect((feedConfig as any).description).toBe("Test Description");
       });
 
       it("should reject feed creation with missing title", async () => {
@@ -297,7 +297,7 @@ describe("Admin Routes", () => {
         );
 
         expect(deleteRes.status).toBe(200);
-        const payload = await deleteRes.json();
+        const payload = (await deleteRes.json()) as any;
         expect(payload.ok).toBe(true);
         expect(payload.feedId).toBe(feedId);
       });
@@ -419,7 +419,7 @@ describe("Admin Routes", () => {
         );
 
         expect(deleteRes.status).toBe(200);
-        const payload = await deleteRes.json();
+        const payload = (await deleteRes.json()) as any;
         expect(payload.ok).toBe(true);
         expect(payload.emailKey).toBe(emailKey);
 

src/test/setup.ts

@@ -1,26 +1,10 @@
 import { beforeAll, afterAll, afterEach } from "vitest";
 import { setupServer } from "msw/node";
 
-/**
- * Mock implementation of Cloudflare Workers runtime environment
- * Based on: https://developers.cloudflare.com/workers/testing/
- */
-
-// Define Cloudflare Workers runtime globals
-declare global {
-  // CF Worker specific globals
-  var caches: CacheStorage;
-  var crypto: Crypto;
-  var Response: typeof Response;
-  var Request: typeof Request;
-  var URLSearchParams: typeof URLSearchParams;
-  var URL: typeof URL;
-  var Headers: typeof Headers;
-  var FormData: typeof FormData;
-  var Blob: typeof Blob;
-  var atob: (data: string) => string;
-  var btoa: (data: string) => string;
-}
+// Minimal Node.js built-ins used only in this test setup file.
+// Declared locally to avoid pulling in the full @types/node package,
+// which would conflict with @cloudflare/workers-types globals.
+declare function require(id: string): any;
 
 /**
  * Mock KV namespace implementation
@@ -122,36 +106,45 @@ beforeAll(() => {
   // Setup MSW server
   server.listen({ onUnhandledRequest: "error" });
 
+  // Type-safe access to Node's global object for setting Workers-like globals in tests
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const g = globalThis as any;
+
   // Mock Cloudflare Workers runtime globals
-  global.caches = {
+  g.caches = {
     default: new MockCache(),
     open: async () => new MockCache(),
   } as unknown as CacheStorage;
 
   // Mock crypto for generating random values
-  if (!global.crypto) {
-    global.crypto = require("crypto").webcrypto;
+  if (!g.crypto) {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    g.crypto = require("crypto").webcrypto;
   }
 
   // Ensure other required globals are available
-  if (!global.FormData) {
+  if (!g.FormData) {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
     const { FormData } = require("undici");
-    global.FormData = FormData;
+    g.FormData = FormData;
   }
 
-  if (!global.Headers) {
+  if (!g.Headers) {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
     const { Headers } = require("undici");
-    global.Headers = Headers;
+    g.Headers = Headers;
   }
 
-  if (!global.Request) {
+  if (!g.Request) {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
     const { Request } = require("undici");
-    global.Request = Request;
+    g.Request = Request;
   }
 
-  if (!global.Response) {
+  if (!g.Response) {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
     const { Response } = require("undici");
-    global.Response = Response;
+    g.Response = Response;
   }
 });