chore: update vitest to 5, jsdom to 30 and typescript to 6

lib/__tests__/favicon-badge.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect } from 'vitest';
+import { describe, it, expect, vi } from 'vitest';
 import { formatBadgeCount, renderBadgedFavicon } from '@/lib/favicon-badge';
 
 const BASE_SVG = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000" width="1000pt" height="1000pt"><defs><clipPath id="_clip1"><rect width="1000" height="1000"/></clipPath></defs><g clip-path="url(#_clip1)"><rect width="1000" height="1000" fill="#123456"/></g></svg>`;
@@ -165,9 +165,20 @@ describe('renderBadgedFavicon', () => {
   });
 
   it('returns null rather than throwing when the source contains a lone surrogate', () => {
-    const bad = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10"><title>abc\uD800def</title></svg>`;
-    expect(() => renderBadgedFavicon(bad, 3)).not.toThrow();
-    expect(renderBadgedFavicon(bad, 3)).toBeNull();
+    // Browsers keep the lone surrogate through parsing and serialising, so
+    // encodeURIComponent throws on it. jsdom swaps it for U+FFFD while
+    // parsing, so hand the serialiser's output the surrogate directly.
+    const serialize = XMLSerializer.prototype.serializeToString;
+    vi.spyOn(XMLSerializer.prototype, 'serializeToString').mockImplementation(function (this: XMLSerializer, node: Node) {
+      return serialize.call(this, node).replace('abc', 'abc\uD800');
+    });
+    const bad = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10"><title>abcdef</title></svg>`;
+    try {
+      expect(() => renderBadgedFavicon(bad, 3)).not.toThrow();
+      expect(renderBadgedFavicon(bad, 3)).toBeNull();
+    } finally {
+      vi.restoreAllMocks();
+    }
   });
 
   it('sizes the badge to the label, and only "99+" fills the full icon width', () => {

package.json

@@ -93,7 +93,7 @@
     "@typescript-eslint/eslint-plugin": "^8.72.1",
     "@typescript-eslint/parser": "^8.72.1",
     "@vitejs/plugin-react": "^6.1.2",
-    "@vitest/ui": "^4.1.12",
+    "@vitest/ui": "^5.0.5",
     "esbuild": "^0.28.2",
     "eslint": "^9.39.5",
     "eslint-plugin-react": "^7.37.5",
@@ -101,15 +101,14 @@
     "fake-indexeddb": "^6.2.6",
     "globals": "^17.13.0",
     "husky": "^9.1.7",
-    "jsdom": "^28.1.0",
+    "jsdom": "^30.1.3",
     "tailwindcss": "^4.3.3",
     "tw-animate-css": "^1.4.0",
-    "typescript": "^5.9.3",
-    "vitest": "^4.1.12"
+    "typescript": "^6.0.3",
+    "vitest": "^5.0.5"
   },
   "overrides": {
     "flatted": "^3.4.2",
-    "picomatch": "^4.0.4",
-    "undici": "$undici"
+    "picomatch": "^4.0.4"
   }
 }

vitest.setup.ts

@@ -1,4 +1,4 @@
-import '@testing-library/jest-dom';
+import '@testing-library/jest-dom/vitest';
 import { cleanup } from '@testing-library/react';
 import { afterEach, beforeEach, vi } from 'vitest';
 import { setNoThirdPartyTraffic } from '@/lib/third-party-mode';