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Joeandclaude-flow
fbecae4e02
The dashboard flip-flopped between "absent" and "present_still" after
navigating away and back. The cause was not sensing. On a dropped socket the
client fell back to a built-in simulation and rendered synthetic values that
were indistinguishable from live ones, so the UI was showing made-up readings
and saying nothing about it.
That is the most damaging failure this UI can have. A sensing system that
invents data silently is worse than one that shows nothing, because every
downstream judgement -- including which nodes to move and whether a change
helped -- is then made against fiction.
Changes:
- Client-side simulation is default-OFF and must be opted into explicitly.
- An unreachable server retries forever instead of substituting data.
- A banner states plainly whenever what is displayed is not live. The
labels say what they mean: "NO DATA - SERVER UNREACHABLE" for an
unreachable server, and "INVENTED DATA - NOT MEASURED" for simulation,
replacing "OFFLINE - CLIENT SIMULATION", which read like a status rather
than a warning.
Also fixes a reconnect race in the same path: two in-flight connects could each
install handlers, so a stale socket kept overwriting fresher state. That race is
what made the flip-flop intermittent and hard to attribute.
Co-Authored-By: claude-flow <ruv@ruv.net>