The Vec<Option<Pad>> slot table, active_mask unplug sweep, and PadGate-
checked create that all seven backend managers copy-paste, extracted into
one unit-tested inject/pad_slots.rs (cfg any(linux,windows), like
pad_gate). sweep() returns the swept indices as a bitmask and ensure()
returns fresh-create, so managers reset their per-index sibling state
(state / last_rumble / dedup / clocks) without closure gymnastics.
Lifecycle log lines are label/device/hint-parameterized to stay
byte-identical per backend; open() keeps the success line (it knows the
transport detail).
Additive only — no manager converted yet; first unit coverage for the
sweep/create lifecycle (5 tests: freshness, sweep-once semantics, gate
integration, recreate, pump iteration).
Verified on .21: clippy --all-targets -D warnings clean; suite 285
pass / 0 fail (280 prior + 5 new).
Part of G12/3.3 (gamepad-review-cleanup.md §3a.3, commit 2 of the §3a.4
sequence).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler
528a51d75c