Copilot review round 11. The web counterpart of the TUI lock added in round 9.
Neither clear control was guarded while the operation was pending, and
revocation can take up to five seconds — so a double click started concurrent
RFC 7009 requests, concurrent store writes and two contradictory toasts against
the same client. Both controls now share one ref-backed in-flight lock in
`runClear`, since they drive the same client and the same store entry.
A ref rather than state, for the reason the TUI one is: a double click delivers
both events before React re-renders, so a state-based guard lets both through.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0177mPHAdECD18nLLCTwR5rh
Signed-off-by: cliffhall <cliff@futurescale.com>
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