Phase 1: nonce/replay correctness + unauthenticated-command guard - #126

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davelee98:debug/freeze-fix-phase1

Commits on Jul 26, 2026

docs: freeze-proofing plan, plan review, and timer/watchdog inventory
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docs: Phase 1 implementation plan — nonce/replay correctness
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docs: Phase 1 adversarial review + corrections; wire-protocol constraint
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fix(nonce): replace 512 B replay value ring with a 32 B sliding bitmap
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fix(nonce): split check from commit; stop counting packet loss as tampering
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fix(pipe): do not answer a nonce-dropped 0x0081 frame with a fatal NACK
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ci: separate host-tests job for the nonce-window state machine
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test: host test for the nonce sliding-window state machine
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fix(nonce): review follow-ups - split log budgets, readable replay log, honest comments
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fix(nonce): answer session-id mismatch with AUTH_REQUIRED, not a fatal NACK
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feat(auth): drop the BLE link after 10 consecutive unauthenticated commands
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fix(auth): drop the BLE link inline on nRF; loop() is starved mid-transfer
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