feat: support dynamic agent runner defaults

src/langbot/templates/config.yaml

@@ -137,4 +137,6 @@ space:
     # OAuth authorization page URL (user will be redirected here)
     oauth_authorize_url: 'https://space.langbot.app/auth/authorize'
     disable_models_service: false
+    # Max seconds to wait for startup model-list sync. Set to 0 to disable the timeout.
+    models_sync_timeout: 10
     disable_telemetry: false

src/langbot/templates/default-pipeline-config.json

@@ -38,12 +38,10 @@
     },
     "ai": {
         "runner": {
-            "id": "plugin:langbot/local-agent/default",
+            "id": "",
             "expire-time": 0
         },
-        "runner_config": {
-            "plugin:langbot/local-agent/default": {}
-        }
+        "runner_config": {}
     },
     "output": {
         "long-text-processing": {
@@ -64,4 +62,4 @@
             "remove-think": false
         }
     }
-}
+}