Gesture swipes never commit on Windows

[Stanley5249]

What happens

Holding a gesture button (Middle/Back/Forward in gesture mode) and swiping does
nothing on Windows. Only the plain click on release fires. The same binding works
on macOS and Linux.

Why

crates/openlogi-hook/src/windows.rs never emits MouseEvent::Moved — the
WH_MOUSE_LL translation handles buttons and both wheel axes, but not
WM_MOUSEMOVE. SwipeAccumulator therefore sees zero travel for the whole hold
and can never reach GESTURE_SWIPE_THRESHOLD.

The reason it was left out: WH_MOUSE_LL carries the cursor position
(MSLLHOOKSTRUCT.pt), not a delta, and the OS clamps that position to the desktop
bounds. macOS (MOUSE_EVENT_DELTA_X) and Linux (REL_X) both get the device's own
relative counts for free.

Two candidate fixes

• fix(hook): report Windows pointer motion by differencing the cursor point #473 — difference MSLLHOOKSTRUCT.pt against the previous point in a thread-local.
  ~15 lines, no new APIs. A swipe that runs into a screen edge stops producing
  deltas and may not reach the threshold.
• fix(hook): read Windows pointer motion from raw input #472 (draft) — register for raw input (WM_INPUT, RIDEV_INPUTSINK) and read the device's
  relative counts. No edge clamping, and matches the other two platforms. Costs a
  message-only sink window, a batched GetRawInputBuffer drain on the hook thread,
  and ordering care between the two input paths.

They are alternatives, not a sequence — one of them lands.

Environment

Windows 11, OpenLogi 0.6.22, Logitech G502 X LIGHTSPEED.

[linear-code]

OLG-172