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Drop the vestigial Ds4Feedback.hidout field (parse_ds4_output never filled it and neither DS4 manager read it — the lightbar rides the led field, now converted to a HidOutput::Led by the protos) and its now-unused HidOutput import; refresh the pad_gate module doc (managers now drive it via pad_slots). Verified: .21 clippy --all-targets -D warnings + full suite 290 pass / 0 fail + cargo fmt --check clean; .133 clippy --all-targets -D warnings EXITCODE 0. Part of G12/3.3 (§3a.4 commit 10) — extraction complete. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>