add empty chat endpoint

apps/chat/src/chat.app.ts

@@ -0,0 +1,27 @@
+import { Hono } from 'hono'
+import { useWorkersLogger } from 'workers-tagged-logger'
+
+import { withNotFound, withOnError } from '@repo/hono-helpers'
+
+import type { App } from './context'
+
+const app = new Hono<App>()
+	.use(
+		'*',
+		// middleware
+		(c, next) =>
+			useWorkersLogger(c.env.NAME, {
+				environment: c.env.ENVIRONMENT,
+				release: c.env.SENTRY_RELEASE,
+			})(c, next)
+	)
+
+	.onError(withOnError())
+	.notFound(withNotFound())
+
+	.get('/', (c) => c.json({ service: 'chat', status: 'ok' }))
+
+	// Chat threads. No DB binding yet — the C# `ChatController.Get` returns `[]`.
+	.get('/thread', (c) => c.json([]))
+
+export default app