v0.6.1

Changed

• Enable stamping by default: stamp_claude_code_enabled (Anthropic
  TTL/thinking/top_k/max_tokens/output_config/context_management stamps) and
  stamp_reasoning_effort_enabled (OpenAI reasoning_effort injection) now
  default to true. Existing installs without an explicit value in
  config.json are silently upgraded — a startup console.warn banner fires
  when the flip is implicit. Set to false in Config → Stamps or config.json
  to disable.

Added

• Restart-service button on the API key gate: after saving the API key,
  the login page now shows a "Restart Service" button. umans_api_key is a
  restart-required field — the live proxy config does not pick up the saved
  key until restart. The button calls POST /dashboard/api/restart, polls
  until the server responds, then reloads the page.

Fixed

• API key not recognized until manual restart: the dashboard saved the
  key to disk but the gate closed without prompting for a restart, leaving
  the user in a state where /v1/usage polling and gate sizing stayed
  disabled until the next manual service restart.
• Promotion paragraph on API key gate now mentions stamp toggles: the
  "Heads up" paragraph previously pointed only to "Config → Experimental"
  for passthrough-proxy users. It now also mentions "Config → Stamps" since
  stamping is enabled by default and is the most impactful body-modification
  feature.