Add About section to settings page with version info and tests (#119)

* feat(web): add About section to settings page

- Add website link to hapi.run
- Display app version from CLI package
- Display protocol version from shared module
- Add Vitest testing setup with settings page tests

🤖 Generated with Claude Code

* test(web): add tests for website link and i18n key usage

Address residual risks mentioned in PR review:
- Test website link URL and security attributes (target, rel)
- Verify correct i18n keys are used for About section via spy

Simplify test setup by using real I18nProvider and en locale.

🤖 Generated with Claude Code

web/vitest.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig, mergeConfig } from 'vitest/config'
+import viteConfig from './vite.config'
+
+export default mergeConfig(
+    viteConfig,
+    defineConfig({
+        test: {
+            globals: false,
+            environment: 'jsdom',
+            include: ['src/**/*.test.{ts,tsx}'],
+            setupFiles: ['./src/test/setup.ts'],
+        },
+    })
+)