Flatten to three packages + extract mizan-runtime

packages/
  mizan-runtime/   Framework-agnostic state engine (~150 lines)
                   Context registry, batched invalidation, fetch primitives
  mizan-django/    Django server adapter (was packages/mizan-rpc/adapters/django/)
                   Codegen moved to mizan-django/generate/
  mizan-react/     React adapter (was packages/mizan-csr/adapters/react/)

Removed premature abstractions: mizan-ast, mizan-schema, mizan-rpc,
mizan-csr, mizan-ssr stub packages. The actual architecture is three
concrete packages, not five abstract layers.

mizan-runtime implements the v1 spec: registerContext with params,
scoped invalidation via microtask batching, server-driven invalidation
from mutation responses, mizanFetch for context bundles, mizanCall for
mutations.

264 Django + 33 React tests pass.

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

packages/mizan-react/README.md

@@ -0,0 +1,103 @@
+# @rythazhur/mizan (TypeScript)
+
+React client for the mizan framework. See the [monorepo root](../README.md) for full documentation.
+
+## Install
+
+```bash
+npm install @rythazhur/mizan@git+https://git.impactsoundworks.com/isw/mizan.git#workspace=react
+```
+
+## Usage
+
+You don't use this package directly. You use the **generated hooks**.
+
+### 1. Configure
+
+```js
+// django.config.mjs
+export default {
+    source: {
+        django: {
+            managePath: '../backend/manage.py',
+            command: ['uv', 'run', 'python'],
+        },
+    },
+    output: 'src/api/generated.ts',
+}
+```
+
+### 2. Generate
+
+```bash
+npx mizan-generate        # once
+npx mizan-generate --watch # dev mode
+```
+
+### 3. Wrap your app
+
+```tsx
+import { DjangoContext } from '@/api'
+
+<DjangoContext>
+    <App />
+</DjangoContext>
+```
+
+`DjangoContext` is the only provider you need. It handles HTTP, WebSocket, CSRF, session init, context auto-fetching, and channel connections.
+
+### 4. Use generated hooks
+
+```tsx
+import { useCurrentUser, useEcho, useContactForm, useChatChannel } from '@/api'
+
+// Context (SSR-hydrated, auto-refreshed)
+const user = useCurrentUser()
+
+// Server function
+const echo = useEcho()
+const result = await echo({ text: 'hello' })
+
+// Form (Zod + server validation)
+const form = useContactForm()
+form.set('email', 'test@example.com')
+await form.submit()
+
+// Channel (WebSocket)
+const chat = useChatChannel({ room: 'general' })
+chat.send({ text: 'hello' })
+chat.messages  // typed, reactive
+```
+
+## Generated Files
+
+| File | Contents |
+|------|----------|
+| `generated.django.tsx` | `DjangoContext` + typed hooks |
+| `generated.mizan.ts` | Pydantic types |
+| `generated.forms.ts` | Form hooks with Zod |
+| `generated.channels.hooks.tsx` | Channel hooks |
+| `index.ts` | Re-exports everything |
+
+## Sub-exports
+
+| Import | When to use |
+|--------|------------|
+| `@rythazhur/mizan` | Core: mizanProvider, hooks, forms, errors |
+| `@rythazhur/mizan/channels` | WebSocket channels |
+| `@rythazhur/mizan/jwt` | JWT token management |
+| `@rythazhur/mizan/client` | HTTP clients (CSR/SSR) |
+| `@rythazhur/mizan/allauth` | Allauth UI components |
+
+These are **library internals** used by the generated code. You should import from `@/api` (your generated index), not from the library directly.
+
+## Running Tests
+
+```bash
+# Unit tests (Vitest, jsdom)
+npm test
+
+# E2E tests (Playwright, real browser)
+# Requires Docker backend running
+npx playwright test
+```