fix: align config with Frontier Local Agenda and fix provider error

config.yaml

@@ -1,6 +1,6 @@
 model:
-  default: claude-opus-4-6
+  default: hermes4:14b
-  provider: anthropic
+  provider: custom
 toolsets:
 - all
 agent:
@@ -27,7 +27,7 @@ browser:
   inactivity_timeout: 120
   record_sessions: false
 checkpoints:
-  enabled: false
+  enabled: true
   max_snapshots: 50
 compression:
   enabled: true
@@ -110,7 +110,7 @@ tts:
     device: cpu
 stt:
   enabled: true
-  provider: local
+  provider: openai
   local:
     model: base
   openai: