Remote Control: stuck 'Thinking…' indicator with no active tool calls

Description

A Remote Control session showed a persistent "Thinking…" indicator in the client UI with no corresponding activity — no active tool calls, no pending work on the agent side.

Environment

• Remote Control peer name: VM111 (Fedora 44 VM)
• claude-rc.service (systemd user service wrapping claude --remote-control VM111 in tmux) confirmed healthy throughout: active (running), continuous uptime since last boot, no crashes or unexpected restarts in the journal.
• No active Bash/tool calls, no background Monitor tasks, no pending MCP calls at the time the indicator was observed.

Expected behavior

The "Thinking…" indicator should reflect actual agent activity and clear when the agent is idle.

Actual behavior

Indicator persisted with the underlying session fully idle and the wrapping systemd service confirmed healthy — appears to be a client-side/UI-layer desync between the Remote Control display and actual session state, not a backend service crash.

Additional context

Not consistently reproducible; reported from a single live observation. Happy to provide more detail if needed, though the underlying claude-rc.service logs showed nothing unusual at the time.