Rename djarea to mizan and fix React casing conventions

Rename the package from djarea to mizan across the entire codebase —
Python package, React library, generators, tests, and examples. Fix
JSX/hook casing (MizanProvider, useMizan, etc.) that broke when the
original PascalCase names were lowercased during the rename.

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

desktop/tests/conftest.py

@@ -1,7 +1,8 @@
 import django
 from django.conf import settings
 
+
 # Ensure migrations run before tests
 def pytest_configure():
-    # Import djarea_clients to trigger function registration
-    import backend.djarea_clients  # noqa: F401
+    # Import mizan_clients to trigger function registration
+    import backend.mizan_clients  # noqa: F401