fix: remove backend placeholders

README.md

@@ -36,7 +36,7 @@ cd frontend && npm install && npm run dev
 # → http://localhost:3000
 ```
 
-**Frontend + backend** (so the app can show “Backend API: N todos”):
+**Frontend + backend** (for AI agent and health):
 
 ```bash
 # Terminal 1 – backend
@@ -45,7 +45,7 @@ cd backend && npm install && npm run dev
 
 # Terminal 2 – frontend
 cd frontend && npm install && npm run dev
-# → http://localhost:3000 (Vite proxies /api/todos to backend)
+# → http://localhost:3000 (Vite proxies /api/* and /health to backend)
 ```
 
 ---
@@ -89,16 +89,9 @@ For self-hosting (e.g. Tailscale/HTTPS): set `CORS_ORIGIN` to your frontend URL;
 
 | Method | Path | Description |
 |--------|------|-------------|
-| GET    | `/api/todos`     | List all todos. |
-| GET    | `/api/todos/:id` | Get one todo. |
-| POST   | `/api/todos`     | Create (`{ "title": "...", "completed": false }`). |
-| PUT    | `/api/todos/:id` | Update. |
-| DELETE | `/api/todos/:id` | Delete. |
 | GET    | `/health`        | Health check (e.g. for Docker). |
 | POST   | `/api/agent`     | Run AI agent; body `{ "prompt", "context?", "contextNodes?" }` → `{ "markdown" }`. |
 
-Data is in-memory (resets on restart). Add a JSON file or DB later if needed.
-
 ---
 
 ## Agent node (local LLM or OpenAI)

backend/package.json

@@ -2,7 +2,7 @@
   "name": "zui-backend",
   "version": "1.0.0",
   "private": true,
-  "description": "Minimal Express API for Zui (todos CRUD, no DB)",
+  "description": "Minimal Express API for Zui (agent, health; no DB)",
   "main": "src/index.js",
   "scripts": {
     "start": "node src/index.js",

backend/src/index.js

@@ -1,5 +1,5 @@
 /**
- * Minimal Express API: /api/todos CRUD (in-memory).
+ * Minimal Express API: /api/agent, /health.
  * No DB, no auth. CORS allowed for frontend. Production-ready env (PORT, CORS_ORIGIN).
  */
 
@@ -14,72 +14,6 @@ const app = express()
 app.use(cors({ origin: CORS_ORIGIN }))
 app.use(express.json())
 
-// In-memory store (replace with JSON file or DB later)
-let todos = [
-  { id: '1', title: 'Sample todo', completed: false },
-  { id: '2', title: 'Another item', completed: true },
-]
-let nextId = 3
-
-/** GET /api/todos — list all */
-app.get('/api/todos', (req, res) => {
-  try {
-    res.json(todos)
-  } catch (err) {
-    res.status(500).json({ error: err.message })
-  }
-})
-
-/** GET /api/todos/:id — get one */
-app.get('/api/todos/:id', (req, res) => {
-  try {
-    const todo = todos.find((t) => t.id === req.params.id)
-    if (!todo) return res.status(404).json({ error: 'Not found' })
-    res.json(todo)
-  } catch (err) {
-    res.status(500).json({ error: err.message })
-  }
-})
-
-/** POST /api/todos — create */
-app.post('/api/todos', (req, res) => {
-  try {
-    const { title, completed } = req.body ?? {}
-    const id = String(nextId++)
-    const todo = { id, title: title ?? '', completed: Boolean(completed) }
-    todos.push(todo)
-    res.status(201).json(todo)
-  } catch (err) {
-    res.status(500).json({ error: err.message })
-  }
-})
-
-/** PUT /api/todos/:id — update */
-app.put('/api/todos/:id', (req, res) => {
-  try {
-    const idx = todos.findIndex((t) => t.id === req.params.id)
-    if (idx === -1) return res.status(404).json({ error: 'Not found' })
-    const { title, completed } = req.body ?? {}
-    if (title !== undefined) todos[idx].title = title
-    if (completed !== undefined) todos[idx].completed = Boolean(completed)
-    res.json(todos[idx])
-  } catch (err) {
-    res.status(500).json({ error: err.message })
-  }
-})
-
-/** DELETE /api/todos/:id — delete */
-app.delete('/api/todos/:id', (req, res) => {
-  try {
-    const idx = todos.findIndex((t) => t.id === req.params.id)
-    if (idx === -1) return res.status(404).json({ error: 'Not found' })
-    const removed = todos.splice(idx, 1)[0]
-    res.json(removed)
-  } catch (err) {
-    res.status(500).json({ error: err.message })
-  }
-})
-
 /** Build OpenAI client and full prompt from request body. Returns { openai, modelId, fullPrompt } or { error }. */
 function buildAgentRequest(body) {
   const { prompt, context, contextNodes, connection: conn, reasoning } = body ?? {}

frontend/src/app/canvas/CanvasPage.tsx

@@ -194,16 +194,6 @@ export function CanvasPage({ projectId }: CanvasPageProps) {
   graphRef.current.nodes = nodes
   graphRef.current.edges = edges
 
-  const [apiTodosCount, setApiTodosCount] = React.useState<number | null>(null)
-  React.useEffect(() => {
-    fetch('/api/todos')
-      .then((r) => r.json())
-      .then((data: unknown) => {
-        if (Array.isArray(data)) setApiTodosCount(data.length)
-      })
-      .catch(() => setApiTodosCount(-1))
-  }, [])
-
   const pendingChangesRef = useRef<NodeChange<Node>[]>([])
   const rafRef = useRef<number | null>(null)
   const onNodesChange = useCallback(
@@ -644,11 +634,6 @@ export function CanvasPage({ projectId }: CanvasPageProps) {
         canCopy={selectedNodes.length === 1}
         onFitView={() => flowActionsRef.current?.fitView?.()}
       />
-      {apiTodosCount !== null && (
-        <div className="shrink-0 px-3 py-1 text-xs text-muted-foreground border-b border-border/50">
-          Backend API: {apiTodosCount >= 0 ? `${apiTodosCount} todos` : 'unavailable'}
-        </div>
-      )}
       <div className="flex-1 min-h-0 relative flex flex-col">
         <div className="flex-1 min-h-0 flex flex-col">
           <GraphContext.Provider value={graphContextValue}>

frontend/vite.config.ts

@@ -8,14 +8,6 @@ export default defineConfig({
   server: {
     proxy: {
       // Backend API (dev): proxy to avoid CORS
-      '/api/todos': {
-        target: 'http://localhost:8080',
-        changeOrigin: true,
-      },
-      '/api/todos/': {
-        target: 'http://localhost:8080',
-        changeOrigin: true,
-      },
       '/health': {
         target: 'http://localhost:8080',
         changeOrigin: true,