chore(07-01): isolate vitest glob from e2e, add tsconfig.e2e.json typecheck gate

- Add exclude: ['e2e/**', 'node_modules/**'] to vitest.config.ts test block
  to prevent Playwright specs from being picked up by Vitest jsdom runner
- Add tsconfig.e2e.json extending main tsconfig with node types for
  playwright.config.ts and e2e/**/* typecheck coverage
- Add @types/node to pwa devDependencies (required by playwright.config.ts)
- Update typecheck script to run both src and e2e tsc passes
- 191 unit tests still pass; no e2e import errors in vitest run

apps/pwa/package.json

@@ -7,7 +7,7 @@
     "dev": "vite",
     "build": "tsc && vite build",
     "preview": "vite preview",
-    "typecheck": "tsc --noEmit",
+    "typecheck": "tsc --noEmit && tsc --project tsconfig.e2e.json --noEmit",
     "test": "vitest run",
     "test:e2e": "playwright test",
     "test:e2e:ui": "playwright test --ui",
@@ -37,6 +37,7 @@
     "@playwright/test": "1.60.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.0",
+    "@types/node": "^22.19.19",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
     "@vitejs/plugin-react": "^4.3.0",