Fix reset lost-response test failure timing

[SaladDay]

The lost-response reset test enabled deployment read failures before submitting the reset. A refresh could therefore correctly disable the reset button, preventing the test from reaching the scenario it intended to verify.

Enable failed reconciliation reads only after the fixture accepts the reset POST, then drop its response. Keep the existing assertions for disabled controls, exactly one reset write, and recovery after a successful read. No product code changes.

Validation: the focused Playwright case passed (15.8 seconds); git diff --check passed. The run reported font serving warnings from shared dependency paths; this is behavioral evidence, not visual acceptance. Final combined checks remain with the integration owner.

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