Fix lint: exempt storage test from no-restricted-globals, remove non-null assertion

eslint.config.js

@@ -162,7 +162,7 @@ export default [
   // window.localStorage / window.sessionStorage: only src/shared/storage.ts
   {
     files: ["src/**/*.{ts,tsx}"],
-    ignores: ["src/shared/storage.ts"],
+    ignores: ["src/shared/storage.ts", "src/shared/storage.test.ts"],
     rules: {
       "no-restricted-globals": [
         "error",

src/server/middleware/csp.test.ts

@@ -37,7 +37,7 @@ describe("cspMiddleware", () => {
       middleware(req, res, vi.fn());
       const csp = res.headers.get("Content-Security-Policy") ?? "";
       const match = csp.match(/nonce-([^']+)/);
-      if (match) nonces.push(match[1]!);
+      if (match?.[1]) nonces.push(match[1]);
     }
 
     const unique = new Set(nonces);