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/pyproject.toml

@@ -1,16 +1,16 @@
 [project]
-name = "djarea-desktop"
+name = "mizan-desktop"
 version = "0.1.0"
-description = "Desktop integration test app for Djarea"
+description = "Desktop integration test app for mizan"
 requires-python = ">=3.10"
 dependencies = [
-    "djarea[channels]",
+    "mizan[channels]",
     "uvicorn[standard]>=0.30",
     "pywebview[qt]>=5.0",
 ]
 
 [tool.uv.sources]
-djarea = { path = "../django", editable = true }
+mizan = { path = "../django", editable = true }
 
 [project.optional-dependencies]
 dev = [