fix: remove backend placeholders

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 ?? {}