* Liquify: simplify the brush-resize gesture condition
Same logic; clears clippy's nonminimal_bool on 1.96.
* Channels: keep the cached composite across view-only changes
Channel eye toggles bump the revision the cache was keyed on, so it was always dropped. The test only passed when the freed buffer came back at the same address, and failed under load.
Clippy 1.96 flags the `retain` predicate that strips stale content blocks
from pixel layers on PSD export (`clippy::nonminimal_bool`), which breaks
`cargo clippy -- -D warnings` on current stable.
Rewrite it as a single negated disjunction. The four terms, their order and
the short-circuiting are unchanged, so the same blocks are kept and dropped.
Persi