Feature Request

Current behaviour: Talk Mode has a hard-coded client-side silence timeout that cuts off the user after a fixed period of silence. This causes repeated interruptions during natural pauses in speech (thinking, reading, etc.).

Desired behaviour: Make the silence timeout configurable, either:

1. A setting in openclaw.json (e.g. talk.silenceTimeoutMs: 5000)
2. A runtime toggle in Talk Mode UI (short/medium/long/manual)
3. Both — config default with runtime override

Use case: Users who pause to think, read documents, or compose thoughts mid-sentence are constantly cut off. The current timeout is too aggressive for conversational use.

Environment: OpenClaw 2026.2.14, macOS, AirPods Pro