feat: display agent name alongside label in terminal title and list output

When a label is set (e.g. "bob"), the display becomes "bob (claude-implementer)"
so the agent type is always visible. Affects all three backends (docker,
macos-container, smolmachines) and the `cli.py list active` output.

Closes #243

bot_bottle/backend/docker/launch.py

@@ -176,7 +176,7 @@ def launch(
             agent_command=plan.agent_command,
             agent_prompt_mode=plan.agent_prompt_mode,
             agent_provider_template=plan.agent_provider_template,
-            terminal_title=plan.spec.label or plan.spec.agent_name,
+            terminal_title=f"{plan.spec.label} ({plan.spec.agent_name})" if plan.spec.label else plan.spec.agent_name,
             terminal_color=plan.spec.color,
             agent_workdir=plan.workspace_plan.workdir,
         )