Full test infrastructure, code audit fixes, and real E2E integration tests

Test infrastructure:
- Django standalone test runner (pytest-django, test settings, EmailUser model)
- React unit tests via Vitest with jsdom, jest compat layer, path aliases
- Playwright E2E tests using generated hooks in a real Chromium browser
- Docker Compose test backend (Django + Redis) for integration testing
- Desktop integration test app (PyWebView + Django + uvicorn)
- Makefile with test/test-django/test-react/test-integration targets

Library bugs found and fixed:
- hasJWT truthiness: undefined !== null was true, skipping session init
- process.env crash: CSR client referenced process.env in non-Node browsers
- baseUrl not forwarded: DjareaProvider didn't pass baseUrl to CSR client
- Relative URL handling: new URL() failed with relative base paths
- call() race condition: HTTP requests fired before CSRF cookie was set
- Session init await: added sessionRef promise so call() waits for session
- path_prefix on schema export: both export commands failed with URL reverse
- NullBooleanField removed: referenced field doesn't exist in Django 5.0+
- lru_cache on JWT settings: get_settings() now cached as intended
- Channel message routing: broadcasts now include channel name and params
- httpFunctionCall: fixed URL and request body format

Generator fixes:
- Removed 1,100 lines of REST/OpenAPI client generation (not part of Djarea)
- Generator now works for djarea-only projects without django-ninja REST APIs
- Generated DjangoContext now includes ChannelProvider when channels exist
- Fixed env var passthrough for schema export commands
- Deduplicated fetch logic into single runDjangoCommand helper

Test quality:
- Fixed 33 tautological Django tests with real assertions
- Found hidden bug: benchmark functions were never registered
- Found hidden bug: unicode lookalike test used plain ASCII
- Deleted worthless React unit tests (duplicates, shape checks, Zod-tests-Zod)
- Replaced jsdom integration tests with Playwright browser tests

Example apps:
- example/: Integration test backend with 33 server functions, 5 forms,
  4 channels covering auth variations, contexts, class-based ServerFunction,
  error codes, DjareaFormMixin, formsets, and JWT
- desktop/: PyWebView desktop app with file system access, SQLite CRUD,
  system introspection, and 39 real HTTP integration tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

example/testapp/settings.py

@@ -0,0 +1,76 @@
+"""
+Django settings for the integration test backend.
+
+Provides:
+- HTTP server functions (echo, add)
+- WebSocket channels (chat, notifications, presence)
+- JWT authentication
+- Form integration (login, signup, add_email)
+"""
+
+import os
+
+SECRET_KEY = "integration-test-secret-key-not-for-production"
+
+DEBUG = True
+
+ALLOWED_HOSTS = ["*"]
+
+INSTALLED_APPS = [
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sessions",
+    "djarea",
+    "testapp",
+]
+
+AUTH_USER_MODEL = "testapp.EmailUser"
+
+MIDDLEWARE = [
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+]
+
+ROOT_URLCONF = "testapp.urls"
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": os.path.join(os.path.dirname(__file__), "..", "db.sqlite3"),
+    }
+}
+
+DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
+
+ASGI_APPLICATION = "testapp.asgi.application"
+
+# JWT
+JWT_PRIVATE_KEY = "integration-test-jwt-secret-key"
+JWT_ALGORITHM = "HS256"
+
+# Channel layers — Redis when available, in-memory fallback for local dev
+REDIS_URL = os.environ.get("REDIS_URL", "")
+if REDIS_URL:
+    CHANNEL_LAYERS = {
+        "default": {
+            "BACKEND": "channels_redis.core.RedisChannelLayer",
+            "CONFIG": {"hosts": [REDIS_URL]},
+        },
+    }
+else:
+    CHANNEL_LAYERS = {
+        "default": {
+            "BACKEND": "channels.layers.InMemoryChannelLayer",
+        },
+    }
+
+# Session
+SESSION_ENGINE = "django.contrib.sessions.backends.db"
+
+# CORS — allow React dev server
+CSRF_TRUSTED_ORIGINS = [
+    "http://localhost:3000",
+    "http://localhost:5173",
+    "http://localhost:5174",
+]