0.1.0:4 - expose /api/endpoints as separate StartOS service interface

Adds a second sdk.createInterface with type='api' and path='/api/endpoints' on the
same uiPort (9999). StartOS dashboard now shows two service interfaces: Web UI and
OpenAI-compatible API. The API URL is discoverable to other services without users
needing to remember the /api/endpoints suffix.

package/startos/interfaces.ts

@@ -18,8 +18,21 @@ export const setInterfaces = sdk.setupInterfaces(async ({ effects }) => {
     path: '',
     query: {},
   })
+  const api = sdk.createInterface(effects, {
+    name: i18n('OpenAI-compatible API'),
+    id: 'api',
+    description: i18n(
+      'Service-discovery JSON at /api/endpoints. Other apps on the LAN can GET this to learn the current vLLM, Parakeet, and Magpie URLs.',
+    ),
+    type: 'api',
+    masked: false,
+    schemeOverride: null,
+    username: null,
+    path: '/api/endpoints',
+    query: {},
+  })
 
-  const uiReceipt = await uiMultiOrigin.export([ui])
+  const receipt = await uiMultiOrigin.export([ui, api])
 
-  return [uiReceipt]
+  return [receipt]
 })