Phase 4: Translate Shared Components - common, navigation, status labels

- Translate LoadingState and EmptyState components (common namespace)
- Translate Header navigation labels (navigation namespace)
- Translate StatusBadge trade status labels (exchange namespace)
- Create navigation.json translation files for es, en, ca
- Create exchange.json translation files for status/direction/transfer labels
- Update IntlProvider to load navigation and exchange namespaces
- Update frontend tests to expect Spanish translations (default language)
- Configure Playwright to use English language for e2e tests via storageState
- Fix test expectations to match translated strings

All frontend and e2e tests passing.

frontend/playwright.config.ts

@@ -20,5 +20,21 @@ export default defineConfig({
     // Reduce screenshot/recording overhead
     screenshot: "only-on-failure",
     trace: "retain-on-failure",
+    // Set language to English for all e2e tests via localStorage
+    // E2E tests should only test in English according to requirements
+    storageState: {
+      cookies: [],
+      origins: [
+        {
+          origin: "http://localhost:3000",
+          localStorage: [
+            {
+              name: "arbret-locale",
+              value: "en",
+            },
+          ],
+        },
+      ],
+    },
   },
 });