Restructure tree by role; rename mizan-runtime → mizan-base

packages/ flattens into:
  backends/   server protocol adapters (mizan-django, mizan-ts)
  frontends/  client kernel + framework adapters (mizan-base, mizan-react, mizan-vue, mizan-svelte)
  workers/    runtime workers (mizan-ssr)
  cores/      shared language-level primitives (empty for now; mizan-python forthcoming)

The frontend kernel (was packages/mizan-runtime, now frontends/mizan-base) is
renamed to reflect its role — it's the shared base that frontend adapters
depend on directly. Reflects the substrate position that per-framework adapters
wrap a single shared kernel; codegen targets the adapter, not the raw kernel.

Path updates landed in: Makefile, two Gitea workflows, Dockerfile.test, four
example/harness config files, .claude/settings.local.json, four docs
(CLAUDE/ISSUES/ROADMAP/AFI_ARCHITECTURE), four codegen templates (stage1 +
react/vue/svelte adapters), and three package.jsons (the mizan-base rename
plus mizan-vue/svelte peerDeps).

Generated files under examples/django-react-site/harness/src/api/ still
reference @mizan/runtime — left as-is; they're regenerated artifacts and
the harness is non-functional pending the React wrapper-layer codegen.

Also folded in a pre-existing fix: the Gitea workflows had
working-directory: react / django pointing at a layout that predates
packages/, never updated.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

workers/mizan-ssr/bun.lock

@@ -0,0 +1,37 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "@mizan/ssr",
+      "dependencies": {
+        "react": "^19.0.0",
+        "react-dom": "^19.0.0",
+      },
+      "devDependencies": {
+        "@types/react": "^19.0.0",
+        "@types/react-dom": "^19.0.0",
+        "bun-types": "latest",
+      },
+    },
+  },
+  "packages": {
+    "@types/node": ["@types/node@25.5.2", "", { "dependencies": { "undici-types": "~7.18.0" } }, "sha512-tO4ZIRKNC+MDWV4qKVZe3Ql/woTnmHDr5JD8UI5hn2pwBrHEwOEMZK7WlNb5RKB6EoJ02gwmQS9OrjuFnZYdpg=="],
+
+    "@types/react": ["@types/react@19.2.14", "", { "dependencies": { "csstype": "^3.2.2" } }, "sha512-ilcTH/UniCkMdtexkoCN0bI7pMcJDvmQFPvuPvmEaYA/NSfFTAgdUSLAoVjaRJm7+6PvcM+q1zYOwS4wTYMF9w=="],
+
+    "@types/react-dom": ["@types/react-dom@19.2.3", "", { "peerDependencies": { "@types/react": "^19.2.0" } }, "sha512-jp2L/eY6fn+KgVVQAOqYItbF0VY/YApe5Mz2F0aykSO8gx31bYCZyvSeYxCHKvzHG5eZjc+zyaS5BrBWya2+kQ=="],
+
+    "bun-types": ["bun-types@1.3.11", "", { "dependencies": { "@types/node": "*" } }, "sha512-1KGPpoxQWl9f6wcZh57LvrPIInQMn2TQ7jsgxqpRzg+l0QPOFvJVH7HmvHo/AiPgwXy+/Thf6Ov3EdVn1vOabg=="],
+
+    "csstype": ["csstype@3.2.3", "", {}, "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ=="],
+
+    "react": ["react@19.2.4", "", {}, "sha512-9nfp2hYpCwOjAN+8TZFGhtWEwgvWHXqESH8qT89AT/lWklpLON22Lc8pEtnpsZz7VmawabSU0gCjnj8aC0euHQ=="],
+
+    "react-dom": ["react-dom@19.2.4", "", { "dependencies": { "scheduler": "^0.27.0" }, "peerDependencies": { "react": "^19.2.4" } }, "sha512-AXJdLo8kgMbimY95O2aKQqsz2iWi9jMgKJhRBAxECE4IFxfcazB2LmzloIoibJI3C12IlY20+KFaLv+71bUJeQ=="],
+
+    "scheduler": ["scheduler@0.27.0", "", {}, "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q=="],
+
+    "undici-types": ["undici-types@7.18.2", "", {}, "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w=="],
+  }
+}

workers/mizan-ssr/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "@mizan/ssr",
+  "version": "0.1.0",
+  "description": "Mizan SSR worker — renders React components to HTML via stdin/stdout JSON-RPC.",
+  "type": "module",
+  "main": "src/worker.tsx",
+  "scripts": {
+    "test": "bun test"
+  },
+  "dependencies": {
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "bun-types": "latest",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0"
+  },
+  "license": "MIT"
+}

workers/mizan-ssr/src/index.ts

@@ -0,0 +1,2 @@
+// The SSR package is a Bun worker subprocess (worker.tsx).
+// It is not imported as a library. Django's SSRBridge spawns it.

workers/mizan-ssr/src/test-worker.tsx

@@ -0,0 +1,29 @@
+/**
+ * Test SSR worker — registers simple components for the test suite.
+ */
+
+import { registerComponent } from './worker'
+
+// Simple component that renders props
+function Hello({ name }: { name: string }) {
+    return <div>Hello, {name}!</div>
+}
+
+// Component that renders a list
+function UserProfile({ user_id, name }: { user_id: number; name: string }) {
+    return (
+        <div className="profile">
+            <h1>{name}</h1>
+            <span>ID: {user_id}</span>
+        </div>
+    )
+}
+
+// Component that throws during render
+function Broken() {
+    throw new Error('Intentional render error')
+}
+
+registerComponent('Hello', Hello)
+registerComponent('UserProfile', UserProfile)
+registerComponent('Broken', Broken)

workers/mizan-ssr/src/worker.tsx

@@ -0,0 +1,72 @@
+import { renderToString } from 'react-dom/server'
+import { createElement } from 'react'
+
+const cache = new Map<string, any>()
+
+function respond(msg: Record<string, any>): void {
+    Bun.write(Bun.stdout, JSON.stringify(msg) + '\n')
+}
+
+async function handleMessage(msg: any): Promise<void> {
+    if (msg.method === 'ping') {
+        respond({ id: msg.id, pong: true })
+        return
+    }
+
+    if (msg.method === 'render') {
+        const { file, props } = msg.params ?? {}
+
+        if (!file) {
+            respond({ id: msg.id, error: 'Missing file path' })
+            return
+        }
+
+        try {
+            let mod = cache.get(file)
+            if (!mod) {
+                mod = await import(file)
+                cache.set(file, mod)
+            }
+
+            const Component = mod.default || Object.values(mod)[0]
+            if (!Component) {
+                respond({ id: msg.id, error: `No component exported from ${file}` })
+                return
+            }
+
+            const html = renderToString(createElement(Component, props ?? {}))
+            respond({ id: msg.id, html })
+        } catch (e: any) {
+            respond({ id: msg.id, error: e.message })
+        }
+        return
+    }
+
+    respond({ id: msg.id, error: `Unknown method: ${msg.method}` })
+}
+
+async function processInput(): Promise<void> {
+    const reader = Bun.stdin.stream().getReader()
+    const decoder = new TextDecoder()
+    let buffer = ''
+
+    while (true) {
+        const { done, value } = await reader.read()
+        if (done) break
+
+        buffer += decoder.decode(value, { stream: true })
+
+        let i: number
+        while ((i = buffer.indexOf('\n')) !== -1) {
+            const line = buffer.slice(0, i).trim()
+            buffer = buffer.slice(i + 1)
+            if (line) {
+                try { await handleMessage(JSON.parse(line)) }
+                catch (e: any) { respond({ id: -1, error: e.message }) }
+            }
+        }
+    }
+}
+
+respond({ id: 0, ready: true })
+processInput()