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/vitest.config.ts

@@ -10,5 +10,10 @@ export default defineConfig({
     // With TZ=UTC, new Date('2026-06-10T23:30:00-04:00').getFullYear() etc. return the
     // UTC wall-clock values, making assertions stable across EDT/PST/UTC environments.
     env: { TZ: 'UTC' },
+    // Prevent Vitest's default **/*.{test,spec}.ts glob from picking up
+    // apps/pwa/e2e/*.spec.ts files, which import @playwright/test APIs
+    // (devices, etc.) that are not available in the jsdom environment.
+    // See Phase 7 RESEARCH.md §Pitfall 1.
+    exclude: ['e2e/**', 'node_modules/**'],
   },
 })