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/test_notes.py

@@ -12,7 +12,7 @@ from urllib.request import urlopen, Request
 
 class RealHTTPMixin:
     def _session_init(self):
-        url = f"{self.live_server_url}/api/djarea/session/"
+        url = f"{self.live_server_url}/api/mizan/session/"
         resp = urlopen(Request(url))
         cookies = resp.headers.get_all("Set-Cookie") or []
         for cookie in cookies:
@@ -24,7 +24,7 @@ class RealHTTPMixin:
         self._cookies = ""
 
     def _call(self, fn: str, args: dict | None = None):
-        url = f"{self.live_server_url}/api/djarea/call/"
+        url = f"{self.live_server_url}/api/mizan/call/"
         body = json.dumps({"fn": fn, "args": args or {}}).encode()
         req = Request(url, data=body, method="POST")
         req.add_header("Content-Type", "application/json")
@@ -105,6 +105,7 @@ class NotesCRUDTests(RealHTTPMixin, LiveServerTestCase):
 
         # Verify it's gone
         from urllib.error import HTTPError
+
         try:
             get_data = self._call("get_note", {"id": note_id})
             self.assertTrue(get_data["error"])