InputController.#invokeSkillCommand cleared the draft and awaited the full
promptCustomMessage dispatch with no transcript render. AgentSession.#promptWithMessage
runs awaited preflight (memory recall, before_agent_start hooks, auto-thinking
classification, pre-prompt compaction) before the message reaches the agent, so a slow
step such as a Hindsight auto-recall timeout left the composer cleared with no pending
row, unlike a normal prompt's optimistic row from startPendingSubmission.
Idle skill submissions now paint an optimistic skill row before the awaited dispatch;
the canonical message_start reconciles it in place via EventController instead of
appending a duplicate. Streaming submissions still queue and show their chip.
Fixes#8895
roboomp
0808226ca3