fix(thumbwheel): scale remapped vertical scrolling

[hsearcy]

Summary

Remapped thumb-wheel ScrollUp / ScrollDown actions currently go through the discrete-action path, so thumbwheel_sensitivity changes their trigger threshold but not the amount scrolled. On affected devices this produces the very slow vertical scrolling reported in #737, and setting the sensitivity as high as 100 still does not meaningfully change the scroll distance.

Route vertical scroll actions through the same continuous, native-resolution-aware accumulator used by horizontal thumb-wheel scrolling. The configured sensitivity is now a proportional multiplier for either scroll axis.

Changes

• openlogi-agent-core: treat all four scroll actions as continuous thumb-wheel output, carrying explicit horizontal and vertical deltas; add vertical-axis regression coverage.
• openlogi-inject: generalize diverted thumb-wheel injection to (delta_x, delta_y) on macOS, Linux, and Windows.
• openlogi-core: document that thumb-wheel sensitivity scales remapped vertical scrolling too.
• openlogi-desktop: add a Vertical Scroll (Reversed) thumb-wheel preset and cover its binding pair.
• openlogi-ui: add the new preset label to every locale catalog.

Related work

• fix(thumbwheel): stop the tap firing App Exposé, and scroll by the wheel's native amount #857 fixed the hidden thumb-wheel tap action and corrected diverted resolution scaling, but vertical scroll actions still bypass that proportional scroll path.
• Thumb wheel horizontal scroll can't be reversed: default binding pair is inverted vs. native scroll direction #619 tracks a separate horizontal default-direction mismatch; this PR does not change horizontal defaults.
• feat(mouse): add Zoom In/Out actions with continuous thumb-wheel zoom #764 adds continuous thumb-wheel zoom and may overlap the accumulator/injection files, but does not implement proportional vertical scrolling.

Testing

• cargo fmt --all -- --check
• cargo clippy --workspace --all-targets -- -D warnings
• cargo test -p openlogi-agent-core watchers::gesture::tests — 16 passed, including binding-change accumulator isolation
• cargo test -p openlogi-desktop thumbwheel — 12 passed
• cargo test -p openlogi-desktop services::i18n::tests::locale_file_resolves_keys — passed
• cargo test -p openlogi-ui locale — 3 passed
• cargo check -p openlogi-inject
• cargo doc -p openlogi-inject -p openlogi-agent-core --no-deps --document-private-items with RUSTDOCFLAGS=-D warnings

cargo test --workspace passes all product and feature suites locally, but the command exits on an existing Windows-only xtask assertion: its workflow parser joins \\\n continuations while this checkout contains \\\r\n. The full non-GUI rustdoc command likewise reaches an existing Windows-gated broken link in openlogi-permissions; warnings-denied rustdoc passes for both changed non-GUI crates.

Not runtime-tested on hardware. The Windows injector compiled on the test host; macOS and Linux injection branches were hand-audited but not compiled locally.

Fixes #737

[greptile-apps]

Greptile Summary

Routes remapped vertical thumb-wheel actions through the same sensitivity-scaled accumulator and cross-platform injection path as horizontal scrolling.

• Tracks the active scroll binding so fractional progress is reset when the axis or direction changes.
• Generalizes macOS, Linux, and Windows injection to carry horizontal and vertical deltas.
• Adds a reversed vertical-scroll preset, regression tests, documentation updates, and localized labels.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains; the active scroll-binding identity now prevents fractional progress from crossing axes or directions after a live binding change.

Important Files Changed

Filename	Overview
crates/openlogi-agent-core/src/watchers/gesture.rs	Adds axis-aware continuous scrolling and resets retained fractional progress whenever the effective scroll binding changes, resolving the previous accumulator-crossing issue.
crates/openlogi-inject/src/inject.rs	Generalizes diverted thumb-wheel reinjection to explicit horizontal and vertical deltas.
crates/openlogi-inject/src/inject/macos.rs	Emits both scroll axes through the Core Graphics line-scroll event.
crates/openlogi-inject/src/inject/windows.rs	Emits vertical and horizontal wheel inputs with the appropriate Win32 event flags.
crates/openlogi-desktop/src/features/mouse/thumbwheel.rs	Adds and tests the reversed vertical-scroll preset and its action pair.

_{Reviews (2): Last reviewed commit: "fix(thumbwheel): isolate fractional bind..." | Re-trigger Greptile}